Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "impact analysis" wg kryterium: Temat


Tytuł:
Dynamical analysis of a constrained flexible extensible link with rigid support and clearance
Autorzy:
Dupac, M
Powiązania:
https://bibliotekanauki.pl/articles/280562.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
multibody dynamics
impact analysis
contact forces
Opis:
Dynamic response of robotic systems is affected by deformation of their flexible components, velocity and mass of the systems, as well as by the presence of clearance or impact between the components. Since accurate simulations of such robotic systems are increasingly important, the modelling and dynamical behaviour of an extensible mechanism with a rigid crank and a flexible link is investigated in this paper. The equations of motion of the extensible flexible link, constrained to a circular, Cartesian, elliptical, Cassinian, Lame or pear-shaped quartic path, are presented. A dynamical analysis is carried out in order to compare the dynamical response of the flexible link vs. a rigid link under the combined effect of different parameters such as flexibility and clearance. The simulation result shows clear trajectories divergence due to the impact effect of the flexible link on the rigid crank.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 3; 665-676
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural assessment of the hull response of an fpso unit to dropped objects: a case study
Autorzy:
Ozguc, Ozgur
Powiązania:
https://bibliotekanauki.pl/articles/259379.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
drop object
hull response
impact analysis
offshore structures
Opis:
Offshore structures are exposed to the risk of damage caused by various types of extreme and accidental events, such as fire, explosion, collision, and dropped objects. These events cause structural damage in the impact area, including yielding of materials, local buckling, and in some cases local failure and penetration. The structural response of an FPSO hull subjected to events involving dropped objects is investigated in this study, and non-linear finite element analyses are carried out using an explicit dynamic code written LS-DYNA software. The scenarios involving dropped objects are based on the impact from the fall of a container and rigid mechanical equipment. Impact analyses of the dropped objects demonstrated that even though some structural members were permanently deformed by drop loads, no failure took place in accordance with the plastic strain criteria, as per NORSOK standards. The findings and insights derived from the present study may be informative in the safe design of floating offshore structures.
Źródło:
Polish Maritime Research; 2019, 4; 39-46
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulatory Impact Analysis Practice in New Zealand in the Light of Models of Evaluation Use – Inspiration for the Polish Government
Autorzy:
Kupiec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/417362.pdf
Data publikacji:
2015-06-15
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
regulatory impact assessment
regulatory impact analysis
use of evaluation
New Zealand
Opis:
Purpose: The paper describes the functioning of the RIA system in New Zealand using the analogy of RIA and the evaluation of public interventions. Presented solutions can provide inspiration for the Polish government in the process of improving the quality and extent of the use of RIA. Methodology: The analysis is based on a review of government documents and literature, as well as individual interviews and correspondence with representatives of the government of NZ. Conclusions: The RIA system in NZ is not error-free and its shortcomings include inter alia the lack of solutions with respect to ex-post analysis and insufficiently rigorous methodological approach. At the same time, a number of solutions can be regarded as good practice, e.g.: regular external quality reviews of RIS, obligation to supplement each RIS with ‘quality assessment’ and a ‘disclosure statement’ outlining their credibility and utility. Practical implications: The presented strengths of the RIA system in NZ may serve as an inspiration for modifying the RIA system in Poland. Originality: The RIA system is presented through the prism of the model of evaluation use, which is a related tool of collecting information about non-regulatory interventions.
Źródło:
Management and Business Administration. Central Europe; 2015, 2; 109-128
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Passive safety of a buggy-type car in the aspect of a dynamic analysis of the frame
Autorzy:
Różyło, Patryk
Powiązania:
https://bibliotekanauki.pl/articles/386470.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
passive safety
finite element method
dynamic impact analysis
overload
abaqus
Opis:
This article presents passive safety issues of a buggy-type car. The issue has been presented in the context of the dynamic impact analysis of the aluminium frame of the vehicle into a rigid wall. The study was conducted using the finite element method in the Abaqus® software. With regard to numerical calculations, a dynamic impact simulation was performed, which defined the critical areas of the structure. Numerical analysis allowed to obtain both the state of the strain of the frame structure and the characteristics of the construction work during the impact. The results of the research provide high-quality prepared FEM model.
Źródło:
Acta Mechanica et Automatica; 2019, 13, 2; 75-79
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of impact load of arch yielding support
Autorzy:
Tokarczyk, J.
Turewicz, K.
Smolnik, G.
Rotkegel, M.
Powiązania:
https://bibliotekanauki.pl/articles/243887.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
virtual prototyping
finite elements method
mining
impact analysis
experimental test
Opis:
Bumping is one of the natural hazards that occur in Polish collieries. It is a common phenomenon but difficult to predict and very often it causes huge losses in mining equipment and roadway structure. Death of miners working underground is most severe result of bumping. To reduce or even to eliminate results of bumping, especially fatal cases, many safety measures have been used. Frame of arch support is one of the measures applied to reduce dangerous results of bumping. Simulation test ofimpact load of arch yielding support was presented in the paper. The simulation of support load was realized in two stages. Static load of frame of yielding arch support was simulated at the first stage. Among others simulation of assembly of arch support components was carried out. Non-linear simulation, including contact phenomena, was conducted for that purpose. First stage of the task was realized in MSC.Marc/Mentat software Structure of yielding arch support was dynamically loaded at the second stage. The forcing corresponded to real dynamic loads that werefound in mine workings. Second stage of the task was realized in MSC.Dytran software The results of simulations carried out at the KOMAG Institute of Mining Technology were compared with the results of tests of arch supports, which were realized at the Central Mining Institute.
Źródło:
Journal of KONES; 2010, 17, 1; 455-464
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis on two wheeler chassis frame of e-bike subjected to static and impact loads
Autorzy:
Konada, Naresh Kumar
Suman, Koka Naga Sai
Powiązania:
https://bibliotekanauki.pl/articles/95203.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
two wheeler chassis frame
static analysis
impact analysis
rama podwozia pojazdu dwukołowego
analiza statyczna
analiza wpływu
Opis:
The future of automotive industry is to design and develop electrical vehicles to control the emissions released from gaseous fuels and not to release any harmful gases in to atmosphere. In this work, an attempt was made to analyze the behavior of two wheeler E- bike with alternative materials of frame such as Aluminum alloy (Al-A), Titanium alloy (Ti-A), Grey cast iron (G-CI), Carbon fiber epoxy (CF-E), and Structural steel (ST-S) and compared with AISI-1020 material. The frame of Yamaha R15 is initially modeled by using solid work and imported to Ansys. Static analysis was performed by applying a load of 1500 N on the frame and Impact analysis was performed by applying velocity of 27.7 m/s along X direction. The values of equivalent von Mises stress and total deformation for all the materials are observed. After performing static analysis, it was observed that, CF- Epoxy material exhibited higher value of Equivalent von Mises stress (7.659*107 Pa) and lower total deformation of (0.304×10-6 mm) compared to remaining materials. Based on impact analysis , it was observed that, CF-E exhibited better von Mises stress of (3994.9 MPa) closer to AISI 1020 and structural steel materials and total deformation is observed to be lower value (0.1106 mm) compared to remaining materials.
Źródło:
Journal of Mechanical and Energy Engineering; 2020, 4, 1; 15-26
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact-based piezoelectric energy harvesting system excited from diesel engine suspension
Autorzy:
Caban, Jacek
Litak, Grzegorz
Ambrożkiewicz, Bartłomiej
Gardyński, Leszek
Stączek, Paweł
Wolszczak, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/118147.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
vibration energy harvesting
impact analysis
diesel engine
zbieranie energii drgań
analiza uderzeń
silnik wysokoprężny
Opis:
Vibration energy harvesting systems are using real ambient sources of vibration excitation. In our paper, we study the dynamical voltage response of the piezoelectric vibrational energy harvesting system (PVEHs) with a mechanical resonator possessing an amplitude limiter. The PVEHs consist of the cantilever beam with a piezoelectric patch. The proposed system was subjected to the inertial excitation from the engine suspension. Impacts of the beam resonator are useful to increase of system’s frequency transition band. The suitable simulations of the resonator and piezoelectric transducer are performed by using measured signal from the engine suspension. Voltage outputs of linear (without amplitude limiter) and nonlinear harvesters were compared indicating better efficiency of the nonlinear design.
Źródło:
Applied Computer Science; 2020, 16, 3; 16-29
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental impact assessment of a planned construction project – case study of the Tuchów bypass
Ocena oddziaływania na środowisko planowanego przedsięwzięcia – studium przypadku obwodnicy Tuchowa
Autorzy:
Gawrońska, Grażyna
Gawroński, Krzysztof
Król, Karol
Buzowski, Hubert
Powiązania:
https://bibliotekanauki.pl/articles/100314.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
impact assessment analysis
road infrastructure
investment in linear infrastructure
environmental protection
analiza oceny oddziaływania
infrastruktura drogowa
inwestycje liniowe
ochrona środowiska
Opis:
The objective of the present work is to analyse the environmental impact assessment of the project consisting in the construction of the Tuchów bypass (Tarnów district of the Małopolska Region, Poland) as well as to verify the correctness of the report on the impact of the said project on the environment. The paper presents issues related to environmental impact assessment and a detailed analysis of the impact of the planned project on particular elements of the natural environment, including soil and water conditions, land surface, surface and underground water, atmospheric air, acoustic climate, as well as waste management. The conclusions are based on the results of the research and descriptive analysis. It has been demonstrated that the report on the impact of the Tuchów bypass road construction project on the environment has been prepared correctly, and the investment project in question will not have a negative impact on the environment or human health.
Celem pracy jest analiza oceny oddziaływania na środowisko przedsięwzięcia polegającego na budowie obwodnicy Tuchowa (powiat tarnowski, Małopolska, Polska), a także weryfikacja poprawności sporządzenia raportu o oddziaływaniu tego przedsięwzięcia na środowisko. W pracy przedstawione zostały zagadnienia związane z oceną oddziaływania na środowisko oraz szczegółowa analiza oddziaływania planowanego przedsięwzięcia na poszczególne elementy środowiska, w tym: warunki gruntowo-wodne, powierzchnię ziemi, wody powierzchniowe i podziemne, powietrze atmosferyczne, klimat akustyczny, a także gospodarkę odpadami. Wnioski oparto na podstawie wyników analizy opisowo-badawczej. Wykazano, że raport o oddziaływaniu przedsięwzięcia budowy obwodnicy Tuchowa na środowisko został sporządzony poprawnie, a przedmiotowa inwestycja nie będzie negatywnie oddziaływać na środowisko i zdrowie ludzi.
Źródło:
Geomatics, Landmanagement and Landscape; 2019, 2; 21-36
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Low-Velocity Impact Behavior of Twaron® Fabric Subjected to Double-Impactor Impact from a Numerical Analysis Perspective
Autorzy:
Huang, Canyi
Cui, Lina
Qiu, Yiping
Liu, Yajun
Powiązania:
https://bibliotekanauki.pl/articles/24200929.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
double impactor impact
low-velocity
impact behavior
numerical analysis
Opis:
In the present study, a finite element impact model was developed and analyzed using commercial FEM code ANSYS® and then validated via a drop-weight impact experiment. Moreover, double-impactor impact models were designed and developed with different impact distribution and locations of two impactors to compare impact properties. A total of 18 impact scenarios comprised of asymmetric and symmetric types were performed. The effect of impact location on the impact resistance force and duration time was investigated: the closer the impact point is to the fabric center, the longer the impact duration time. In addition, the effect of impact location on impactor failure deflection was also investigated and it was concluded that regardless of the symmetric or asymmetric impact scenario, the smaller the average distance between the impact location of the two impactors from the fixed boundary, the smaller the overall average failure deflection that occurs. The relevance of impact location and fabric energy absorption capacity was also identified. Furthermore, the effect of impact location on fabric stress distribution and transverse deformation and of the variation of the impact velocity on fabric impact behaviors were investigated. These findings will provide important guidance for engineering soft body armor and composite materials.
Źródło:
Fibres & Textiles in Eastern Europe; 2023, 31, 1; 38--51
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probit Analysis - a Promising Tool for Evaluation of Explosives Sensitivity
Autorzy:
Šelešovský, J.
Pachmáň, J.
Powiązania:
https://bibliotekanauki.pl/articles/357996.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
probit analysis
sensitivity
sensitiveness
friction
impact
Opis:
The sensitivity of explosives to various initiating events, in probability of initiation-level of stimulus space, has a shape of sigmoidal curve. In standard sensitivity tests only one point on this curve is sought, most often the 50% initiation probability level. The usual (and most often used) method for its determination is the up-and-down method. The whole sensitivity curve can be obtained by conducting large number of trials at all levels or more effectively by probit analysis. The usage of probit analysis, improvement of the precision of the results and comparison with the results precision of the up-and-down method is demonstrated by the example of determination of sensitivity to friction.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 3; 269-278
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation and energy parameters of fracture of steel of the main gas pipeline
Autorzy:
Maruschak, P
Panin, S
Polyvana, U
Vuherer, T.
Guzanová, A.
Brezinová, J.
Powiązania:
https://bibliotekanauki.pl/articles/102385.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
impact toughness
main gas pipeline
failure analysis
Opis:
By example of steel 17G1S, the regularities in the impact fracture of Charpy specimens at normal and low temperatures are described. The relationship between the energy parameters of fracture (impact toughness) and the deformation response of the material (the height of shear lips) of the specimens from the pipe steel is established. The micromechanisms of impact fracture of the material are described. At 20 °C and –30 °C, focal splitting of the material was observed on the fracture surface of specimens; at –60 °C, the material failed in a brittle manner by the mechanism of cleavage.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 28; 40-46
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Analysis of Trans Papua Corridor Road Infrastructure Development in West Papua and Papua Province of Indonesia
Autorzy:
Rizal, Achmad
Junianto, Junianto
Sahidin, Asep
Zaida, Zaida
Powiązania:
https://bibliotekanauki.pl/articles/1075463.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Impact
Probability
Risk Analysis
Trans Papua
West Papua
Opis:
Trans Papua corridor highway is now an important highway, predictable way Trans Papua will experience overcapacity in the future. To overcome this situation the trans-Papua road building is planned. The investment of highway construction will always be involved in risk with certain scale, it is necessary to do the risk analysis. The purpose of this study is to identify and analyze the risk, measuring of risk probability point and risk impact and risk test by performing simulations using @Risk For Excel software. This research was conducted using a survey method and interview with respondents. The survey was conducted in three phases, namely: beginning survey, preliminary survey and detailed survey. Based on research conducted identified four risk factors are financing risk, construction risk, equipment risk and force majeure. These four risks are identified in the medium risk category. The influence level of risk impact to the increase of construction investment budget plan trans-Papua roads as a whole amounted to 8.07% (IDR. 1,183 trillion equivalent to USD 82,684 million) with risk factor for 0,549 then classified as medium risk. While detaily 15% (IDR. 2,194 trillionequivalent to USD 153,346 million) by a factor of 0.685 then risk being classified as at risk. The most sensitive risk is the risk of Construction.
Źródło:
World Scientific News; 2019, 126; 261-275
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Insensitive Booster Explosive: DAAF Surface-coated with Viton A
Autorzy:
Li, X.
Wu, B.
Liu, S.
An, C.
Wang, J.
Powiązania:
https://bibliotekanauki.pl/articles/358841.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
DAAF
refinement
surface-coated
thermal analysis
impact sensitivity
Opis:
3,3’-Diamino-4,4’-azoxyfurazan (DAAF) is the principal component of an insensitive booster explosive; refined DAAF and DAAF surface-coated with Viton A were prepared. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) were employed to characterize the morphology, composition, and thermal decomposition of these samples. The impact sensitivity and theoretical detonation velocity of DAAF-based composites were also measured and analyzed. The results showed that DAAF surface-coated with Viton A was successfully obtained, and the impact sensitivity of DAAF/Viton A composites was much lower than that of crude DAAF. In addition, DAAF/Viton A composites exhibited better thermal stability compared to crude DAAF and refined DAAF. The theoretical detonation velocity of DAAF/Viton A composites and TATB/Viton A composites are roughly the same. Therefore, there is still great potential for DAAF to be used as the main explosive component of a booster explosive.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 3; 445-455
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring the Social Impact of Infrastructure Projects: The Case of Gdańsk International Fair Co.
Autorzy:
Zamojska, Anna
Próchniak, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/474930.pdf
Data publikacji:
2017
Wydawca:
Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
Tematy:
infrastructure project
social impact
cost and benefit analysis
Opis:
Efficient infrastructure is a prerequisite of, and critical to, development. Only some projects generate a positive rate of return, but all of them should generate positive non-economic impacts and contribute social gains. Social impact is considered as a consequence or effect of decisions or interventions which lead to development. It can also be considered as a social consequence of development. The main problem of social costs and benefits is that the impact is difficult to predict and quantify and can be taken into account differently by authorities, decision makers and project developers. The main purpose of the paper is to identify and demonstrate a concept of the social impact of infrastructure projects. The principal methods used are a review of existing social science literature and surveys based on focus group interviews, devoted stakeholders of infrastructure projects, and their involvement at different stages of the project. The expected result is a set of outputs and outcomes which demonstrates social impacts (costs and benefits) related to stakeholders’ groups of the analyzed project.
Źródło:
Journal of Entrepreneurship, Management and Innovation; 2017, 13, 4; 25-42
2299-7075
2299-7326
Pojawia się w:
Journal of Entrepreneurship, Management and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Environmental and Economic Impacts of Municipal Solid Wastes Management System: A Case Study
Autorzy:
Mosbah, Ezzeddine B.
Alsanad, Mohammed A.
Sassine, Youssef N.
Powiązania:
https://bibliotekanauki.pl/articles/2025720.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
environmental impact
economic impact
municipal solid waste management
MSW
life cycle analysis
life cycle cost analysis
Saudi Arabia
LCA&LCCA
Opis:
In pursuance of the Saudi vision 2030, the Al-Hasa municipality has been allocating a total of US$ 60.1 million since 2018 to the implementation of a modern Municipal Solid Wastes (MSW) management system. In addition to the improved old components, the system involves six new-engineered cells, five of which will be gradually implemented in progresses, two waste sort-out lines station, and LFG energy recovery. The present research aimed at investigating the environmental and economic impacts of this MSW management system. For this purpose, the authors applied the Life Cycle Analysis (LCA) and Life Cycle Costs Analysis (LCCA) approaches. The main results showed that the air quality was not affected. For instance, gas emission, like carbon monoxide, was less than 0.1 ppm. However, soil and groundwater were contaminated due to leachate infiltration from the uncontrolled cell in which Chloride, Nitrate, and Sulfate exceeded the maximum limits. As for noise, it was found to be high near the sorting-out station at 71.1 Leq dBA. In terms of the financial aspect, the improved MSW management was relatively feasible despite its high costs over its revenues. Thus, the negative cash-flow could be supplemented by setting household taxes at US$ 29 per capita per year, which makes the project cost-effective. Thus, the research recommends continuing the MSW management project.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 137-145
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies