Analysis of torsional vibration of the automobile transmission parts with torque converter
Keywords:
computer dynamic model, automobile transmission, hydraulic torque converter, forced torsional vibrations, spectral densityAbstract
Mathematical and computer models are presented to analyze vibrations of an automobile transmission with a planetary reductor and hydraulic torque converter. The aim of the work is to analyze the influence of rotation unevenness of the engine crankshaft on the torsional vibrations of parts of an automobile transmission with a planetary reductor and hydraulic torque converter. The work was carried out by the method of computer simulation using the software «Universal Mechanism». The analysis of forced torsional vibrations of transmission parts in the time and frequency domains is carried out. Statistical characteristics of torsional vibrations and transmission natural frequencies for different gears are calculated. The ranges of the crankshaft angular velocity values are determined, for which the oscillations of the angular velocities and accelerations of the transmission parts have the highest values. The use of hydraulic torque converter makes it possible to significantly reduce the rapid oscillations of angular velocities and accelerations of transmission parts. Angular accelerations increase more strongly than angular velocities when blocking hydraulic torque converter. In the spectral analysis of the automobile transmission torsional vibrations, to determine the step value for presenting the results, the determinant is the condition of the sampling frequency exceeding the doubled value of the highest frequency of the converted variable. The spectra modules of angular accelerations of the turbine and other transmission parts have up to 3 harmonics with amplitudes greater than 0,1 of the 1st harmonic amplitude with the hydraulic torque converter blocked. When the hydraulic torque converter is unlocked, the modules of the angular acceleration spectra do not have higher harmonics with an amplitude greater than 0,1 of the 1st harmonic amplitude. The computer simulation results can be used while designing automotive transmissions.
References
Yoon J.Y., Kim B. Gear rattle analysis of a torsional system with multi-staged clutch damper in a manual transmission under the wide-open throttle condition // Journal of Mechanical Science and Technology. 2016. Vol. 30 (3).
Рp. 1003–1019.
Modeling and analysis of friction clutch at a driveline for suppressing car starting judder / L.P. Li, Z.J. Lu, X.L. Liu et al. // Journal of Sound and Vibration, 2018. Vol. 424. Рp. 335–351.
Тарасик В.П. Математическое моделирование переключения передач с перекрытием характеристик управления // Автомобильная промышленность. 2016. № 7. С. 10–18.
Реутов А.А. Моделирование переключения передач автомобильной трансмиссии с гидротрансформатором // Автоматизация и моделирование в проектировании и управлении. 2022. № 2 (16). С. 27–38.
Реутов А.А. Моделирование переключения передач автомобильной трансмиссии с двойным сцеплением // Автоматизация и моделирование в проектировании и управлении. 2021. № 3-4 (14). С. 14–24.
Haj-Fraj A., Pfeiffer F. A model based approach for the optimization of gearshifting in automatic transmissions // International journal of vehicle design. 2002. Vol. 28 (1), Рp. 171–188.
Li L., Singh R. Analysis of start-up transient for a powertrain system with a nonlinear clutch damper // Mechanical Systems and Signal Processing. 2015. Vol. 62. Рp. 460–479.
Sezgen H.C., Tinkir M. Optimization of torsional vibration damper of cranktrain system using a hybrid damping approach // Engineering Science and Technology. 2021. № 24. Рp. 959–973.
Барков А.В., Баркова Н.А. Вибрационная диагностика машин и оборудования. Анализ вибрации. СПб. : СПбГМТУ, 2004. 156 с.
Effect of stiffness ratio of piecewise-linear spring on the occurrence of subharmonic nonlinear vibration in automatic transmission powertrain / T. Ryu, S. Rosbi, K. Matsuzaki et al. // Applied Mechanics and Materials. 2015. Vol. 786. Рp. 156–160.
Иванов С.Н. Колебания и вибрации трансмиссий автомобилей // Автомобильная промышленность. 2009. № 8. С. 14–16.
Sayın P., Schoftner J. Analytical Investigation on the Damping Performance of а torque Converter in an Automotive Driveline Model // MATEC Web of Conferences 2017. 108:07001. DOI 10.1051/matecconf/201710807001.
Fundamental study of subharmonic vibration of order 1/2 in automatic transmissions for cars / T. Ryu, T. Nakae, K. Matsuzaki et. al. // Journal of Physics: Conference Series, 2016. Vol. 744. 012206. DOI 10.1088/ 1742-6596 /744/1/012206.
Mendes A.S., Meirelles P.S., Zampieri D.E. Analysis of torsional vibration in internal combustion engines: modelling and experimental validation // Proc. IMechE Part K: Journal Multi-body Dynamics. 2008. Vol. 222. Рp. 155–178. DOI 10.1243/14644193JMBD1.
Diesel engine torsional vibration control coupling with speed control system / Guo Yibin, Li Wanyou, Yu Shuwen et al. // Mechanical Systems and Signal Processing, 2017. Vol. 94. Рp. 1–13.
Lin, T.R., Zhang, X.W. A study of the torsional vibration of a 4-cylinder diesel engine crankshaft // Lecture Notes in Mechanical Engineering. Springer Nature Publ, 2019. Р. 383–392.
Brancati R., Rocca E., Lauria D. Feasibility study of the Hilbert transform in detecting the gear rattle phenomenon of automotive transmissions // Journal of Vibration and Control. 2018. Vol. 24 (12). Рp. 2631–2641.
Modeling of transmission. User's manual // Universal mechanism : site. URL: http://www.universalmechanism.com/download/90/eng/22_um_driveline.pdf (Дата обращения: 18.01.2022).
