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Tytuł:
Kultura twórczych dyskusji. Komunikat z badań eksperymentalnych
Culture of Constructive Discussions. A Statement from Experimental Research
Autorzy:
Okraj, Zofia
Powiązania:
https://bibliotekanauki.pl/articles/2171495.pdf
Data publikacji:
2014-02-28
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
discussion
creative thinking
experimental research
Opis:
The article presents the results of experimental research on the culture of creative thinking that consists of its: characteristics, purposes, contents, principles, forms, methods of discussions, and didactic means used to activate students’ creative thinking. The research has also allowed to learn how important in the process of stimulation of students’ creative thinking are such conditions as: atmosphere of discussion, appearance of critical expressions destroying ideas (“idea killers”), and moderators’ personality traits. The main results of the described cycle of creative discussion are: stimulation of students’ creative thinking, teaching students the culture of creative discussion and strategy of “attacking” problems by generating many various and original ideas to solve problems, increasing students’ awareness of their own potential of creativity, and obtaining the ability of discussing and cooperating in teams / groups.
Źródło:
Kultura i Edukacja; 2014, 1(101); 72-98
1230-266X
Pojawia się w:
Kultura i Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the supporting structure of the ”crossbow” rocket launcher in the aspect of improvement of its resistance properties
Autorzy:
Rybak, P.
Borkowski, W.
Hryciów, Z.
Michałowski, B.
Wiśniewski, A.
Wysocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/243483.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
structure
dynamical loads
experimental research
numerical research
Opis:
This paper presents the results of the studies on a special vehicle Polaris Ranger 6×6 800 equipped with the ”Crossbow” antiaircraft rocket launcher, manufactured by TELESYSTEM-MESKO Sp z o. o. Implementation and Manufacture Centre. The supporting structure of the launcher made the main object of the analysis. The essential goal of that undertaking was to obtain a structure of resistance assuring reliable system operation in various conditions of use. In order to reach that goal, the experimental as well as the model tests have been performed on the launcher vehicle. The experimental tests were carried out during multi-variant rides on the paved roads and in the wilderness of significant level of unevenness. Significant information on the level, directions and nature of affecting dynamic loads and the effects of their influence on the vehicle elements. The analysis of obtained results also provided the data required for a development of a model of the object of the studies. A MES model of the object of the studies was prepared in the LS-DYNA system. A high pressure was put on modelling a complex chassis of the launcher and mutual reaction of assemblies and parts. A generalized issue on the own properties was solved – frequencies and associated forms of vibrations of own main assemblies were designated. Resistance calculations were carried out for assumed loads. In principle, loads imposed by normative requirements for a particular class of armament and military equipment were assumed. Loads resulting from potential conditions of use and installation on other carriers were also included. The tests were performed for various load variants. Sensitive elements of the chassis were modified and highly satisfying results were obtained. It gives a reason to think that the chassis is resistant to expected and difficult operation conditions and assures that the whole system will work reliably.
Źródło:
Journal of KONES; 2013, 20, 3; 353-358
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the effectiveness of the innovative protective structure for vehicles
Autorzy:
Borkowski, W.
Rybak, P.
Hryciów, Z.
Starczewski, L.
Gmitrzuk, M.
Szcześniak, K.
Powiązania:
https://bibliotekanauki.pl/articles/243785.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
structure
dynamical loads
experimental research
numerical research
Opis:
This article presents results of the research on developed innovative protective structure for vehicles. The fundamental objective of executed work was to check the correctness of assumed assumptions, shape and geometry of the solution and configuration of components that affect the protective effectiveness during the impact of the explosive. In order to reach that goal, both model tests and experimental tests were carried out. The experimental tests were carried out on the real object. Significant information about the level, directions and nature of affecting dynamic loads were obtained as well as information about their impact on particular structure elements. The MES numerical model of the research object has been developed in LS-Dyna system. Special emphasis was placed on the mapping of complex geometry, configuration of components and their interactions. Test calculations were carried out and then the resistance calculations were made. As a load, generating post-explosion impact wave, the load imposed by normative requirements concerning the way of explosive arrangement as well as the shape and weight. The analysis of obtained results of the experimental and numerical tests allows for high evaluation of effectiveness of proposed solution.
Źródło:
Journal of KONES; 2015, 22, 1; 29-36
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy intensity of the electric vehicle
Autorzy:
Dziubiński, M.
Drozd, A.
Adamiec, M.
Siemionek, E.
Powiązania:
https://bibliotekanauki.pl/articles/102305.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
energy intensity
electric vehicle
experimental research
Opis:
Continuous energy intensity is a relationship between continuous energy intensity and energy intensity of movement. In the paper we proposed to analyze energy intensity of the movement, as the size specifying the power demand to the wheel drive and presented the balance of power of an electric car moving in the urban cycle. The object of the test was a hybrid vehicle with an internal combustion engine and electric motor. The measurements were carried out for 4 speeds and 2 driving profiles.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 27-34
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerodynamic Research on the Midsection of a Long Turbine Blade
Autorzy:
Šimurda, D.
Luxa, M.
Šafařík, P.
Synáč, J.
Powiązania:
https://bibliotekanauki.pl/articles/1943255.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska
Tematy:
transonic flow
turbine blade cascade
experimental research
Opis:
The paper is concerned with experimental aerodynamic research on the midsection of a 1220mm long turbine rotor blade. Optical as well as pneumatic measurements of the midsection blade cascade have been performed in a suction type high-speed wind tunnel. The results of measurements are analyzed and discussed. Interferograms and schlieren pictures taken in a wide range of isentropic exit Mach numbers and incidence angles exhibit the existence of several phenomena occurring in the transonic flow field at certain conditions concerning the exit Mach number and the angle of incidence. A flow separation taking place at an extreme negative incidence has been found to produce an additional loss of 6%. The presence of the reflection of an exit shock wave on the suction side of the neighbouring profile has been found to have a substantial influence on the losses, since the loss coefficient value has increased about 10% in cases without the reflection, i.e. the cases at a high exit Mach number and a high positive angle of incidence. Several reflection types have been observed and described.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 3-4; 135-145
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of Forces During the Extraction Process
Autorzy:
Biały, W.
Wedzicha, J.
Nordin, V.
Powiązania:
https://bibliotekanauki.pl/articles/2065025.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
workability
device
component forces
experimental research
measurement
Opis:
The article briefly describes the factors affecting the workability of coal seams. Next, the construction and principle of operation of a globally unique device for determining the values of forces involved in the cutting process (coal extraction) named POU-BW/01-WAP by the author were presented. It is the only device in the world that determines two of the three component forces that are involved in the cutting process. To this end, two independent measuring blocks were used, which consist of tensometric force sensors: cutting (Fs) and pick downforce (Fd). To register these forces, a real pick was used, which is used in longwall drum shearers - a conical pick. The device has ATEX certification that allows working in real conditions, as a device intended for use in potentially explosive atmospheres - in accordance with Directive 94/9/EC. The instrument has received many awards at global inventiveness and innovative solution trade shows.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 117--128
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehksperimental'nye issledovanija izmel'chitelja grubykh i stebel'chatykh kormov
Experimental reseаrches of shredding machine of coarse and stalky fodder
Autorzy:
Braginec, N.
Vertjj, A.
Powiązania:
https://bibliotekanauki.pl/articles/76512.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
experimental research
shredder
construction characteristics
working body
experimental verification
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operational loads of combat vehicles
Autorzy:
Borkowski, W.
Rybak, P.
Hryciów, Z.
Wysocki, J.
Papliński, K.
Michałowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/244652.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combat vehicles
maintenance
modeling and experimental research
Opis:
The paper describes dynamic load-generating sources and their effects on combat vehicles (CV), placed people and equipment within it. The variety of the operation conditions causes a complex dynamic load, both in terms of level, direction and distribution. The effects of the impacts are shown in photographs. It is important to know the level of loads in terms of the development of resistant and safe high-speed tracked combat vehicles. The selected results of its own researches of high-speed tracked combat vehicles were presented. Research were carried out under conditions similar to those typical for this class of vehicles, both during the rides on the road, the ground and obstacles on the specially constructed for this purpose. The results of research and analysis are compared in the form of graphs and the estimated value. The paper presents angular movement of the hull of the CV as well as displacements of carrying wheels during overcoming a single obstacle, elastic characteristics of hydro-pneumatic suspension components, distribution of pressure acting on a selected area of the bottom of the hull after mine explosion and power spectral density estimator of tank gun vibration as well as being the source longitudinal vibration of the hull tank. The presented scope and methodology allows the multi-variants investigation and estimate the loads of the hall, interior fittings and people in special vehicles and other objects that may be exposed to this type of loads.
Źródło:
Journal of KONES; 2011, 18, 1; 77-84
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad słyszeniem absolutnym u dzieci w wieku wczesnoszkolnym
Research in Perfect Pitch in Children at Early School Age
Autorzy:
Kozłowska-Lewna, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/521964.pdf
Data publikacji:
2011
Wydawca:
Akademia Muzyczna im. Stanisława Moniuszki w Gdańsku
Tematy:
perfect pitch
experimental research
early music education
Opis:
The author presents an overview of contemporary research in perfect pitch and the absolute method, discusses results of her survey on the importance of perfect pitch in musicians, and presents results of experimental activities stimulating perfect pitch in children at early school age. The aim of the experimental research was to answer the question of whether it was possible to effectively stimulate perfect pitch abilities in children at early school age. An experimental ear training program with the use of the absolute method was directed onto children in year one of music school. The effects of the stimulation were applied to two control groups trained by using the relative mFollowing the study, it was found that: perfect pitch can be shaped in a conscious way; the ability develops primarily in early childhood; the process of forming the capacity for absolute hearing begins with memorizing the seven standard pitches of the diatonic scale of C major. The research also confi rmed a high attractiveness of perfect pitch for professional musicians and proved that the ability to consciously stimulate the capacity for absolute hearing in children aged 7–8 years speaks for the use of the absolute method in the initial stage of studies in music schools.
Źródło:
Aspekty Muzyki; 2011, 1; 101-122
2082-6044
Pojawia się w:
Aspekty Muzyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehksperimentalnye i teoreticheskie issledovanija gidrodinamiki kipjashhego sloja drevesnogo topliva
Experimental and theoretical researches of hydrodynamics of the fluidized bed of wood waste
Autorzy:
Red'ko, A.
Pivnenko, J.
Powiązania:
https://bibliotekanauki.pl/articles/78160.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
fluidized bed
wood waste
hydrodynamics
experimental research
theoretical research
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research of the reconfigurable multimodular mechatronic system for inside work
Autorzy:
Kotova, E.
Korotynsky, A.
Kirchenko, V.
Zharov, V.
Powiązania:
https://bibliotekanauki.pl/articles/386402.pdf
Data publikacji:
2008
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
robotyka
badanie eksperymentalne
multimodular system
robotics
experimental research
Opis:
The urgency of the multimodularity concept in a modern robotics is connected to increase of requirements to the created mobile technical systems intended for performance of the broad variety of tasks, including problems of development of space, safety of ability to live and counteraction to terrorism. The modular approach is considered to be the most perspective. There are considered functionalities of multimodular system of wheel type and given characteristics of working breadboard models of modules. The purposes are formulated and results of experimental researches are given.
Źródło:
Acta Mechanica et Automatica; 2008, 2, 4; 44-50
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Granice eksperymentu w makro- i mikrosocjologii
THE LIMITS OF EXPERIMENT IN MACRO- AND MICROSOCIOLOGY
Autorzy:
Sulek, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/427791.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EXPERIMENT
NATURAL SCIENCES
NON-EXPERIMENTAL RESEARCH
SOCIAL SCIENCE
Opis:
One of the frequently discussed features of sociology are its modest possibilities - compared with natural sciences and, even, psychology - of conducting experimental research. Hence the supposition that sociology encounters in the sphere of experiment certain obstacles which are either unknown to those sciences or not met by them in such in such a form and intensity. The aim of this paper is to depict those barriers to experimenting on individuals and social systems. Three main barriers - technical, social-psychological, and axiological are indentified and analyzed.
Źródło:
Studia Socjologiczne; 2011, 1(200); 139-156
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Teoreticheskie i ehksperimental'nye issledovanija gorizontal'nogo otstojjnika s poristojj peregorodkojj
Theoretical and experimental researches of horizontal sump with porous wall
Autorzy:
Ehpojan, S.
Sukhorukov, D.
Ajjrapetjan, T.
Powiązania:
https://bibliotekanauki.pl/articles/76416.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
horizontal sump
porous wall
concrete wall
theoretical research
experimental research
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rezul'taty ehksperimental'nykh issledovanijj pressa predvaritel'nogo uplotnenija s klinopodobnojj kamerojj dlja rastitel'nykh materialov
Results of experimental investigation of press pre-seal with wedge chambers for plant material
Autorzy:
Milko, D.
Powiązania:
https://bibliotekanauki.pl/articles/76537.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
sealing operation
wedge chamber
plant material
density
experimental research
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2016, 18, 1
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The results of experimental research of the huller-polisher machine for grain
Rezul'taty ehksperimental'nykh issledovanijj shelushil'no-shlifoval'nojj mashiny dlja zerna
Autorzy:
Salo, V.
Leschenko, S.
Powiązania:
https://bibliotekanauki.pl/articles/77591.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
experimental research
huller-polisher machine
grain processing
regression equation
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Green rocket propulsion research and development at the institute of aviation : problems and perspectives
Autorzy:
Surmacz, P.
Powiązania:
https://bibliotekanauki.pl/articles/246498.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
propulsion
rocket engine
experimental research
green propellant
hydrogen peroxide
Opis:
The paper presents the main activities of the Institute of Aviation (IoA) in the field of chemical rocket propulsion. The relatively "fresh" research and development team performed many useful works within the last 5 years, starting from the strategy and ideas. Nowadays, the Space Technology Department of IoA acts as a member of international consortia realizing space projects, as well as itself working on its own assignments financed by the European Space Agency (ESA) and IoA funds. The important development aspect of rocket propulsion developed at IoA is the use of "green" propellants. These are chemicals, which are relatively safe for the environment and personnel, being a very promising alternative for storable toxic substances, e.g. hydrazine and derivatives, nitrogen tetroxide. R&D activities of STD are based on the use of Rocket Grade Hydrogen Peroxide (RGHP), also known as High Test Peroxide (HTP). This high-performance mono-propellant and oxidizer is regarded by European entities as one of the most promising candidates to replace hydrazine and its derivatives in the future. Due to numerous advantages, hydrogen peroxide is better suited for systems with human interaction that most of other propellant combinations. The paper contains selected results of research on green rocket propulsion performed at IoA, in which 98% hydrogen peroxide was used as oxidizer and monopropellant. Three types of rocket engines: monopropellant, liquid bipropellant and hybrid have been investigated and are still being developed.
Źródło:
Journal of KONES; 2016, 23, 1; 337-344
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of experimental research on the durability and reliability of mining equipment
Autorzy:
Biały, W.
Powiązania:
https://bibliotekanauki.pl/articles/359457.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
maintenance
reliability
methods of measurement
experimental research
measuring device
Opis:
Due to special conditions of functioning of machinery and devices used in coal mining, the process of its selection is important and should comprise variability of working conditions. A short review of methods of assessment of coal workability used as yet was done and the results were divided into groups. Significance of measurements and assessment of mechanical characteristics (including workability) is proven by worldwide in scientific centres by numerous elaborated methods of its assessment. In the article new devices used in determining and assessing mechanical characteristics of coal that significantly influence durability and reliability of mining machinery were described.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 34 (106); 27-34
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental evaluation of the Constant False Alarm Rate (CFAR) algorithms used in maritime FM-CW radars
Autorzy:
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/360397.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
algorithms
practical efficiency
maritime radar
video signals
experimental research
Opis:
Paper presents basic information on the Constant False Alarm Rate (CFAR) algorithms and assessment of their practical efficiency in maritime FM-CW radar. Experimental research comprised qualitative assessment of the different CFAR algorithms done by the comparison of radar video signals presented by installed in the Gdynia Maritime University FM-CW radar type CRM-203 utilised these algorithms and pulse radars with digital (Raytheon Pathfinder MK2 and NSC 34) and analogue (Racal Decca AC 1690) display units.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 177-181
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research on identifying data for modelling special purpose vehicles
Autorzy:
Rybak, P.
Wysocki, J.
Hryciów, Z.
Michałowski, B.
Wiśniewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/245056.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
special purpose vehicle
combat vehicle
loads
experimental research
modelling
Opis:
The work presents selected results of experimental research on special purpose vehicles used on military training grounds, and bench tests of their main structural elements. The results are connected mainly with identifying the main vibration parameters of those vehicles (regarding weight, resilience and damping), and with the assessment of the level of dynamic loads. The more output data experimental research provides, the more input data we have for designing models. Determined in laboratory tests, weight parameters (regarding weight and moments of inertia), coefficients of stiffness and damping, as well as selected resilience and damping characteristics, are applied in the process of creating the numerical models of assemblies, systems, and complete vehicles. The numerical models created are subject to full verification in order to minimize the differences between the real objects and their representations. The models are applied in multivariate simulation tests of the existing design solutions, upgrading them, or creating new designs. Due to a certain sensitivity of the range of special purpose vehicles, the results of experimental tests and simulation analyses presented in the work are mainly qualitative rather than quantitative.
Źródło:
Journal of KONES; 2017, 24, 3; 245-252
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Acoustic Properties of a Metamaterial with a Multi-Ring Structure
Autorzy:
Szczepański, Grzegorz
Podleśna, Marlena
Morzyński, Leszek
Włudarczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/31339790.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
acoustic metamaterials
numerical research
experimental research
finite element method
multiring structures
Opis:
In this article, the authors present the geometry and measurements of the properties of an acoustic metamaterial with a structure composed of multiple concentric rings. CAD models of the structure were developed and subsequently used in numerical studies, which included the study of resonant frequencies using the Lanczos method and an analysis of sound pressure level distribution under plane wave excitation using the finite element method. Subsequently, experimental tests were carried out on models with the same geometry produced with three different materials (PLA, PET-G, and FLEX) using a fused deposition modeling 3D printing technique. These tests included: determining insertion loss for a single model based on tests using the measurement window of a reverberation chamber and determining transmission loss through tests in a semi-anechoic chamber. Sound wave resonance was obtained for frequencies ranging from 1700 to 6000 Hz. Notably, the experimental studies were carried out for the same structure for which numerical tests were conducted. The physical models of a metamaterial were manufactured using three different readily available 3D printing materials. The results of laboratory tests confirm that the created acoustic metamaterial consisting of multi-ring structures reduces noise in medium and high frequencies.
Źródło:
Archives of Acoustics; 2023, 48, 4; 497-507
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rezul'taty eksperimental'nykh issledovanijj barabannogo dozatora s jacheistojj poverkhnost'ju dlja sypuchikh materialov
The results of experimental research of the drum dispenser with cellular surface for loose materials
Autorzy:
Milko, D.
Powiązania:
https://bibliotekanauki.pl/articles/78107.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
experimental research
drum dispenser
loose material
cellular surface
variation coefficient
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 9
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research on the dynamic loads of the wheeled armoured personnel carrier
Autorzy:
Borkowski, W.
Hryciów, Z.
Michałowski, B.
Rybak, P.
Wiśniewski, A.
Wysocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/243711.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
experimental research
dynamic loads
wheeled armoured personnel carrier
acceleration
vibrations
Opis:
The results of the experimental research on the influence of the special vehicle movement conditions on the body shell and the vehicle crew dynamic load will be presented in the paper. ROSOMAK Wheeled Armoured Personnel Carrier (Wheeled APC), the basic version, was the subject of the research. The research work was aimed at analysis of the dynamic loads resulting from the deterministic inputs and driving on the selected types of surfaces generating random kinematic inputs. The personnel carrier service conditions, measuring apparatus, and testing methods will be described. The vertical accelerations of the selected points of the vehicle, and deflection of the prime and second suspension of the vehicle left side were measured. The time and the acceleration RMS value spectrum charts for the selected implementations will be presented. The cumulative statistics will be shown in the form of a table. The conclusions regarding the influence of the road surface on the personnel carrier driver's working comfort will be formulated. The assessment of the suspension quality will be included in the conclusions. Driving on the smooth surface is comfortable. However, the road surface worsening causes decreased proficiency sense until the exposure limit boundary is reached when the vehicle drives on a poor quality cobble road with 50 km/h speed. The vehicle basic version is not fitted with the seats for assault troops, therefore the influence of the road irregularities on the centre of mass of the body shell, and the driver's and commander's seats were determined. It is recommended to make further tests on the personnel carrier combat and special versions.
Źródło:
Journal of KONES; 2011, 18, 1; 69-76
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary study of the Vacuum Packed Particles torsional damper
Autorzy:
Zalewski, Robert
Rodak, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/1839686.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
Vacuum Packed Particles
torsional damper
experimental research
Bouc-Wen model
Opis:
The paper presents a prototype of an innovatory controllable torsional damper. The device is composed of Vacuum Packed Particles. Such structures are made of granular materials placed in a hermetic soft encapsulation. Generating so called underpressure inside the system changes global dissipative properties of the granular structure. The partial vacuum value is a convenient way to control physical properties of the granular structure. The authors introduce an original prototype of a torsional vibration attenuator. In the experimental part, preliminary experimental results are presented and discussed. To capture the real response of the device, a Bouc-Wen rheological model is adopted.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 173-178
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of results of experimental research of flexible rod composite reinforced concrete structure with sheet steel framework
Autorzy:
Storozhenko, L.
Murza, S.
Beznigaev, B.
Efimenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/111013.pdf
Data publikacji:
2016
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
composite reinforced concrete structure
flexible structure
rod structure
experimental research
Opis:
The article shows the main results of experimental research flexible rod composite reinforced concrete structure with sheet steel framework. When conducting experimental studies of researched the peculiarities of constructions under load and nature loss bearing capacity composite reinforced concrete structure samples with external steel framework with steel plates depending on the eccentricity application of efforts. Common to all samples is that under load was hogging the long axis of the element. This led to an uneven distribution of longitudinal deformations in reinforcement sheet, and accordingly, the wrinkles were formed by the opposite direction of bending. The results showed that the compressed-noncentral elements as limiting load advisable to take two values: the first corresponds to the limit efforts to achieve the most intense fiber sheet reinforcing fluidity limits of steel; second – the moment destruction test sample in which there is intense curvature of the longitudinal axis.
Źródło:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2016, 3; 34-37
2450-1859
2450-8721
Pojawia się w:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research of hydrotransporting concentrated residues at solid fuel burning
Ehksperimentalnye issledovanija parametrov gidrotransportirovanija tverdykh otkhodov TEHC
Autorzy:
Chernetskaya-Beletskaya, N.
Kuschenko, A.
Kapustin, D.
Powiązania:
https://bibliotekanauki.pl/articles/792192.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
non-Newtonian fluid
hydrotransport
transportation
fuel burning
coefficient
experimental research
Opis:
The article presents data of experimental studies that determine the pressure losses and the effective coefficients of linear losses on friction and local resistance at transportation of ash concentrated wastes that show abilities of non-Newtonian fluid in the steady state of constant pipeline diameter, which has a straight portion and turns on 900 and 1800.
В статье представлены материалы экспериментальных исследований по определению потерь давления и эффективных коэффициентов линейных потерь на трение и местные сопротивления при транспортировании концентрированных золовых отходов, которые проявляют свойства неньютоновской жидкости, в установившемся режиме по трубопроводу постоянного диаметра, который имеет прямолинейный участок и повороты на 900 и 1800.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
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