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Tytuł:
An experimental study of the effects of cylinder lubricating oils on the vibration characteristics of a two-stroke low-speed marine diesel engine
Autorzy:
Wu, Gang
Jiang, Guodong
Chen, Changsheng
Jiang, Guohe
Pu, Xigang
Chen, Biwen
Powiązania:
https://bibliotekanauki.pl/articles/34603764.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
two-stroke
low-speed marine diesel engine
cylinder lubricating oils
vibration characteristic
condition monitoring
Opis:
Two-stroke, low-speed diesel engines are widely used in large ships due to their good performance and fuel economy. However, there have been few studies of the effects of lubricating oils on the vibration of two-stroke, low-speed diesel engines. In this work, the effects of three different lubricating oils on the vibration characteristics of a low-speed engine are investigated, using the frequency domain, time-frequency domain, fast Fourier transform (FFT) and short-time Fourier transform (STFT) methods. The results show that non-invasive condition monitoring of the wear to a cylinder liner in a low-speed marine engine can be successfully achieved based on vibration signals. Both the FFT and STFT methods are capable of capturing information about combustion in the cylinder online in real time, and the STFT method also provides the ability to visualise the results with more comprehensive information. From the online condition monitoring of vibration signals, cylinder lubricants with medium viscosity and medium alkali content are found to have the best wear protection properties. This result is consistent with those of an elemental analysis of cylinder lubrication properties and an analysis of the data measured from a piston lifted from the cylinder after 300 h of engine operation.
Źródło:
Polish Maritime Research; 2023, 4; 92-101
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Behaviour of a torsional vibration viscous damper in the event of a damper fluid shortage
Autorzy:
Chmielowiec, Andrzej
Michajłyszyn, Adam
Homik, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/32921253.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
engine vibration
torsional vibration
viscous damper
oil channel
damper design
Opis:
This article presents the analysis of a damping fluid deficiency in a torsional vibration viscous damper. The problem is analysed both qualitatively and quantitatively. Experimental results are presented, showing what happens to the damper in a situation where the design of the housing is inadequate and the inertia forces prevent the formation of an oil film. In addition, the article deals with the problem of the proper design of the oil channel and the dimensions required to enable the damper to operate reliably. The results of the article may be useful to the constructors of torsional vibration viscous dampers for marine engines.
Źródło:
Polish Maritime Research; 2023, 2; 105-113
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid methodology using balancing optimization and vibration analysis to suppress vibrations in a double crank-rocker engine
Autorzy:
Albaghdadi, Anwr M.
Baharom, Masri
Sulaiman, Shaharin
Powiązania:
https://bibliotekanauki.pl/articles/2057975.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
balancing optimization
vibration analysis
double crank rocker engine
mathematical modelling
simulation
Opis:
This study aims to present mathematical modelling to evaluate and analyze double crankrocker engine performance. The study suggests the use of two methods to reduce system vibration through balancing optimization and vibrational analysis. The combination of both methods acts as a verification method; besides it can be used as a tool for further system design enhancement and condition monitoring. The derived mathematical model is then used for balancing optimization to identify system shaking forces and moments, while variable speed is considered as an added parameter to evolve the optimization process. This factor shows better enhancement in reducing system shaking forces and moments compared to constant speed balancing method. Next, the system characteristics were concluded in terms of mode shapes and natural frequencies using modal and frequency response analysis, which give clear clue for secure system operational ground. Finally, the reduction in system vibrations was translated into engine’s centre of mass velocity, which evaluates balancing process effectiveness and indicate if further enhancement should be conducted.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 1; 53--61
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of maximum vibration after the addition of the gorger construction to evaluate the side deck girder construction planning in the ship engine room
Autorzy:
Sugeng, S.
Utomo, B.
Said, S. D.
Yusim, A. K.
Windyandari, A.
Khristyson, S. F.
Afrizal, L.
Jatmiko, A. B.
Sanjiwo, Z. Z.
Powiązania:
https://bibliotekanauki.pl/articles/2172504.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship engine room
side deck girder construction
maximum vibration
gorger construction, vibration
ship vibration measurement
side deck girder
girder
Opis:
The greatest vibration occurs in the engine room, but all other parts of the ship also experience vibrations because it is propagating. Even though there are methods to reduce these vibrations such as engine beds, they can only reduce the damaging effects and cannot completely eliminate the vibrations themselves. The method used in this research is to compare the measurement of good vibrations in the conditions before the addition of construction and after the addition of construction for later comparison with numerical calculation data. The purpose of this study is to obtain the maximum vibration value in the conditions after the addition of the gorger construction before the addition of the side deck girder construction as a means of evaluating the side deck girder construction planning in the ship engine room ship 2000 DWT. The result consideration of adding construction becomes one or the alternative in providing reinforcement so that it can reduce the vibration that occurs. From analyze results after addition of a sized T profile FB 180 x 8 mm FP 75 x 10 mm, which ranges from 28 - 29 m/s2 for the x-axis vibration value, while for vibrations on the y-axis the maximum is 10-11 m/s2, and on the maximum z-axis. at 20-21 m/s2, this analyze vibration is based on the time between 0 - 15 seconds or per 15 second interval, able to reduce percentage of vibration in the ship engine room area is 34.91%.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 2; 337--340
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration-based identification of engine valve clearance using a convolutional neural network
Autorzy:
Tabaszewski, Maciej
Szymański, Grzegorz M.
Nowakowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2124718.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
combustion engine
diagnostics
vibration
machine learning
convolutional network
silnik spalinowy
diagnostyka
drgania
uczenie maszyny
splotowa sieć neuronowa
Opis:
Contemporary operation-related requirements for combustion engines force the necessity of ongoing assessment of their in operation technical condition (e.g. marine engines). The engine efficiency and durability depend on a variety of parameters. One of them is valve clearance. As has been proven in the paper, the assessment of the valve clearance can be based on vibration signals, which is not a problem in terms of signal measurement and processing and is not invasive into the engine structure. The authors described the experimental research aiming at providing information necessary to develop and validate the proposed method. Active experiments were used with the task of valve clearance and registration of vibrations using a three-axis transducer placed on the engine cylinder head. The tests were carried out during various operating conditions of the engine set by 5 rotational speeds and 5 load conditions. In order to extract the training examples, fragments of the signal related to the closing of individual valves were divided into 11 shorter portions. From each of them, an effective value of the signal was determined. Obtained total 32054 training vectors for each valve related to 4 classes of valve clearance including very sensitive clearance above 0.8 mm associated with high dynamic interactions in cylinder head. In the paper, the authors propose to use a convolutional network CNN to assess the correct engine valve clearance. The obtained results were compared with other methods of machine learning (pattern recognition network, random forest). Finally, using CNN the valve clearance class identification error was less than 1% for the intake valve and less than 3.5% for the exhaust valve. Developed method replaces the existing standard methods based on FFT and STFT combined with regression calculation where approximation error is up to 10%. Such results are more useful for further studies related not only to classification, but also to the prediction of the valve clearance condition in real engine operations.
Źródło:
Archives of Transport; 2022, 61, 1; 117--131
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Study of Identifying Emission Sources of Acoustic Signals on the Cylinder Body of a Two-Stroke Marine Diesel Engine
Autorzy:
Dong, Xuan Thin
Nguyen, Manh Hung
Powiązania:
https://bibliotekanauki.pl/articles/1953513.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
acoustic emission
two-stroke marine diesel engine
experimental method
low-to-high frequency ranges
medium-to-high frequency ranges
vibration
Opis:
In this paper, an experimental method was utilized to investigate acoustic emission (AE) characteristics and to identify emission sources of the nonlinear AE signal on the cylinder body of a large low-speed two-stroke marine diesel engine in real-working conditions on the sea in misfiring and normal firing modes. Measurements focused on the AE signal acquired in a transverse direction in low-frequency (20-80 kHz), medium-frequency (100-400 kHz) and high-frequency (400-900 kHz) ranges. The collected signals were analyzed on the crank angle and crank angle-frequency domains. The results showed that all potential sources of the nonlinear AE signal could be mapped in the low-frequency range. However, only the AE signal caused by the combustion process at around the top dead center could be well-observed in the medium-to-high-frequency range. The findings also revealed that in normal firing conditions, the AE energy radiated by friction in the down-stroke period was smaller than in the up-stroke process due to gas-sealing forces. Moreover, the AE energy in the misfiring condition was higher than in the normal firing state. These outcomes considerably contributed understandings to characteristics of friction and wear around the mid-stroke area of the cylinder on a two-stroke marine diesel engine.
Źródło:
Archives of Acoustics; 2021, 46, 1; 105-119
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engine valve clearance diagnostics based on vibration signals and machine learning methods
Diagnostyka luzu zaworów silnika spalinowego z wykorzystaniem sygnału drganiowego i metod uczenia maszynowego
Autorzy:
Tabaszewski, Maciej
Szymański, Grzegorz. M.
Powiązania:
https://bibliotekanauki.pl/articles/1365185.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
combustion engine
diagnostics
vibration
machine learning
silnik spalinowy
diagnostyka
drgania
uczenie maszynowe
Opis:
A dynamic advancement of the design of combustion engines generates a necessity of introduction of strategies of operation based on the information related to their technical condition. The paper analyzes problems related to vibration based diagnostics of valve clearance of a piston combustion engine, significant in terms of its efficiency and durability. Methods of classification have been proposed for the assessment of the valve clearance. Experiments have been performed and described that aimed at providing information necessary to develop and validate the proposed methods. In the performed investigations, the vibration signals were obtained from a triaxial accelerometer located in the engine cylinder head. A parameterization of the obtained vibration signal has been carried out for the engine operating under different engine loads, rotation speeds and valve clearance settings. The parameterization pertained to the specific features of the vibration signals, the derivative of the vibration signal as a function of time as well as the envelope of this derivative. In the first approach, the authors developed a classifier in the form of a set of binary trees that additionally allowed distinguishing the features significant in terms of the identification of adopted classes. For comparison, the authors also developed classifiers in the form of a neural network as well as a k-nearest neighbors algorithm using the Euclidean metric. Based on the performed investigations and analyses a method of valve clearance assessment has been proposed.
Dynamiczny rozwój konstrukcji silników spalinowych generuje potrzebę wprowadzenia strategii eksploatacji jednostek napędowych, opartej na znajomości ich stanu technicznego. W artykule poddano analizie zagadnienia, związane z drganiową diagnostyką luzu zaworów tłokowego silnika spalinowego, istotnego ze względu na efektywność pracy silnika i jego trwałość. Zaproponowano wykorzystanie metod klasyfikacji do oceny poprawności luzu zaworowego. Przeprowadzono i opisano eksperymenty, które miały na celu dostarczenie informacji koniecznych do zbudowania i zweryfikowania zaproponowanych metod. W przeprowadzonych badaniach pozyskano sygnały drganiowe z trójosiowego czujnika przyspieszeń drgań zlokalizowanego na głowicy silnika. Dokonano parametryzacji uzyskanych przebiegów czasowych sygnału drganiowego dla silnika pracującego pod różnym obciążeniem, z różnymi prędkościami obrotowymi oraz z różnymi luzami zaworowymi. Parametryzacja dotyczyła zarówno cech sygnału przyspieszeń drgań, pochodnej przyspieszeń drgań względem czasu jak i obwiedni tej pochodnej. W pierwszym podejściu zbudowano klasyfikator w postaci zbioru drzew binarnych, który przy okazji pozwolił na wyodrębnienie istotnych, ze względu na przyjęte klasy, cech. Dla porównania zbudowano także klasyfikatory w postaci sieci neuronowej jak i algorytmu k – najbliższych sąsiadów z metryką euklidesową. Na podstawie przeprowadzonych badań i analiz zaproponowano metodę oceny luzu zaworowego.
Źródło:
Eksploatacja i Niezawodność; 2020, 22, 2; 331-339
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
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:
The analysis of vibrations in the vehicle with naturally aspirated and turbocharged gasoline engine
Autorzy:
Łoza, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2097460.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
vehicle
vibration
engine
downsizing
fast Fourier transform
accelerometry
pojazd
drgania
silnik
szybka transformata Fouriera
akcelerometria
Opis:
In this paper, the author presents a study of vibrations in a passenger vehicle and the possible influence on driver’s body in the process of natural operation. The author describes the dependence of engine size and additional equipment as the possible primary source of the vibration variations and their further propagation in the entire vehicle structure. The analysis was performed on the passenger cars with naturally aspirated and turbocharged gasoline engines. The aim of this study was to verify the level of vibrations in the vehicle structure with these particular engines, especially influence of downsized power unit, during various state of engine operation. The second goal was to examine the vibrations in the specified location related to driver’s body. The measuring method used piezoelectric accelerometers, which were attached to the designated locations in the vehicle and were able to detect variations of the acceleration. The signals were collected as characteristics in the time domain. In order to achieve frequency domain for spectral analyses, the author applied the Fast Fourier Transform (FFT).
Źródło:
Combustion Engines; 2020, 59, 2; 19--23
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of vibration signals using short-time analysis and clustering in parameter space for detection of combustion engine state
Autorzy:
Boguś, Piotr
Merkisz, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/134160.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
vibration signals
Diesel engine diagnostic
short-time analysis
clustering
sygnały drganiowe
diagnostyka silników wysokoprężnych
analiza krótkoczasowa
klasteryzacja
Opis:
The paper presents a short-time analysis of the vibration signals for the diagnosis of Diesel engine of combustion locomotive by recognition of different engine states using the clustering technique. The main aim of the researches was to distinguish between different engine states represent different wear extends. The proposed method of vibration signal analysis consists on sliding a time window along signal in time and observing the changes of some given statistical parameters. The set of this parameter values creates a multidimensional parameter space where the time evolution can be observed. For recognition and detection of different engine system states some clustering techniques in the parameter space were performed. The results show the possibility of distinguishing different cluster centers within the parameter space which can be assigning to different engine states represented the states before and after a general repair.
Źródło:
Combustion Engines; 2019, 58, 2; 83-87
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of vibrations of gasoline and diesel vehicles as a function of their engine sizes
Autorzy:
Łoza, Łukasz
Wróbel, Radosław
Sitnik, Lech
Powiązania:
https://bibliotekanauki.pl/articles/133959.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
vehicle
vibration
engine
Fourier
vibrometer
pojazd
drgania
silnik
wibrometr
Opis:
This paper presents a study of vibrations appearing in a vehicle in the process of its operation. The authors describe the primary source of the vibrations and their propagation in the entire structure. The observations were performed on the passenger cars with various gasoline and diesel engines. The aim was to examine the level of damping factor in the different locations in the car, precisely specified for the purpose of this studies. The secondary goal was to develop an effective method of obtaining and analyzing signals generated during the engine operation. The chosen instrument was Laser Doppler Vibrometer (LDV), which is used as the non-intrusive measurement utensil to detect velocity variations in designated places. The signals are gathered and collected as group of sinusoidal characteristics in the time domain. In order to achieve specific information about every component of the original signal, the authors apply Fast Fourier Transform (FFT) as the analyzing method. It allows to distinct the basic sinusoidal characteristics in the frequency domain through the spectral analysis. Based on the results, the authors are able to distinguish the dominant modes from the complex signal and indicate their impact on the car.
Źródło:
Combustion Engines; 2019, 58, 3; 20-23
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tire and Engine Sources Contribution to Vehicle Interior Noise and Vibration Exposure Levels
Autorzy:
Abouel-Seoud, Shawki
Powiązania:
https://bibliotekanauki.pl/articles/178006.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
vibro-acoustic
interior vibration
interior noise
tire-road interaction
vehicle engine
Opis:
The main objective of the research presented in this paper is to enhance driver-passengers Comfort of a vehicle that in turn leads to better vehicle safety and stability. The focus was put on studying the interior vibration and noise contributions originated from tire-road and engine-transmission subsystems, due to their significant impact on the dynamic performance of the vehicle. The noise and vibration measurements were recorded at the driver’s head position and on the driver legs room. Furthermore, the influence of different tire types and road surface textures on the vehicle interior noise and vibration were considered. The results indicate that the widely used conventional engine mounts and tires in commercial vehicles cannot fulfill the conflicting requirements for the best isolation concerning both road surface and engine-transmission induced excitations. The values of driver’s head position sound pressure level and floor vibration acceleration broadband averages originate for engine-transmission are lower than that for tire-road interaction. Furthermore, the values of RMS, crest factor, kurtosis and IRI for the vehicle waveform were estimated for vehicle speeds, tire types and road surface textures. Moreover, the percentage contribution for both interior noise and vibration originated from tire-road interaction is higher than the one from vehicle engine-transmission system in all the vehicle speed range, tire type and road surface texture considered.
Źródło:
Archives of Acoustics; 2019, 44, 2; 201-214
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental analysis of noise and vibration of a diesel engine
Autorzy:
Kilikevičienė, K.
Fursenko, A.
Kilikevičius, A.
Vainorius, D.
Matijošius, J.
Rimkus, A.
Bereczky, A.
Powiązania:
https://bibliotekanauki.pl/articles/245124.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biodiesel
compression ignition engine
engine vibration
sound pressure level
silnik wysokoprężny
wibracje silnika
poziom ciśnienia akustycznego
Opis:
Noise and vibration of ignition compression engine is one of the most complicated fields to cope with since every mechanism that compose of the engine affect them separately. In this study, effect of diesel on engine noise and vibration has been studied on an unmodified compression ignition engine. Noise and vibration characteristic of a direct ignition engine, which was fuelled with diesel, were investigated. With the usage of equations obtained from regression analysis, estimation of engine characteristic fuelled with various biodiesels researches were carried out. Tests were conducted at fixed injection timing of diesel fuel. The first system is for diesel fuel injection; the second one is PFI (port-fuelled injection) and is used for injecting alcohol into the engine intake manifold. The engine applied to this study was a naturally aspirated, 3in-line, IVECO AIFO 8031 i06.05 diesel engine with direct injection. Experiments were conducted in a sound insulated room. For each experiment, vibration data gathered from the engine block with 3.2 kHz (for vibration) for 2 s and with 20 kHz sampling frequency for 0.320 s. All measurements were performed under conditions: angle 10; 4 different loads (4, 8, 12 and 20 kW).
Źródło:
Journal of KONES; 2018, 25, 1; 225-232
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of measurement points sensitivity of vibration signals on the stand of jet engine
Autorzy:
Szymański, G. M.
Misztal, W.
Powiązania:
https://bibliotekanauki.pl/articles/133313.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
vibration signal
jet engine
sygnał drganiowy
silnik samolotowy
Opis:
The diagnostic testing of internal combustion engine can be made by using working processes and methods which take advantage of leftover processes. Working processes give information about general condition of internal combustion engine. Leftover processes give information about condition of particular subassemblies and kinematic couples; hence they are used as autonomous processes or as processes supporting other diagnostic methods. Methods based on analysis of vibrations and noise changes to determine technical condition of object are named as vibroacoustic diagnostics. In papers about vibroacoustic diagnostics of engine, problems connected with difficulty to select test point and to define diagnostic parameters containing essential information about engine’s condition, are most often omitted. Selection of engine’s working parameters and conditions of taking measurements or recording vibration signal are usually based on references, researcher’s experience or intuition. General assumptions about taking measurements of signal closest to its source are most often used. This paper presents a new approach to vibroacoustic diagnostics of jet engine. Selection of measurement points of vibration signals on the basis of tests stand results was suggested and perform a sensitivity analysis of measurement points on the engine support.
Źródło:
Combustion Engines; 2017, 56, 4; 279-282
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of middle range frequency vibration of aircraft reciprocating engine
Autorzy:
Goliasz, T.
Czarnigowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/246782.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vibration
aircraft
radial engine
identification
wibracja
samolot
silnik radialny
identyfikacja
Opis:
The authors investigate into vibration characteristics of ASz-62IR-16E aircraft engine. The focus of empirical tests was on the middle frequency vibration range (1000-7000 Hz) that corresponds to vibrations caused by air-fuel mixture combustion process, and defining root mean square of the detected vibration and the amplitude − frequency function. The tests were conducted for seven characteristic engine speeds. Vibrations were measured along three axes of local Cartesian coordinate system. Results indicate directions, frequency ranges and scale of strongest vibrations. The work is a part of identification tests and is intended to provide input for redesign of the engine ignition system. In particular, ASz-62IR-16E engine in test bed, coordinate system for the experiment − designation of axes, sensors mounted on the engine block, comparison of root mean square of full detected range of vibrations (RMS), spectral analysis of vibration for characteristic engine speeds, vibration peaks for all engine speeds, vibrations attributable to combustion process are presented in the article.
Źródło:
Journal of KONES; 2017, 24, 1; 151-158
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 54

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