Modeling and Simulation of Passive Vibration Isolation System of Combustion Engine with Flexible Base

Abstract:

Based on multi-body dynamics, finite element method and solid modeling technology, a dynamic model combined rigid bodies and flexible bodies about passive vibration isolation system of combustion engine with flexible base was built. A simulation analysis was done for a passive vibration isolation system of four-cylinder diesel supported on a flexible flat plate. Simulation result showed static balance and exciting force were same with theory calculation. Through changing support stiffness between flexible flat plate and ground, boundary condition of flexible base could be changed. And the characteristics of vibration isolation were obtained when combustion engine’s flexible base had different stiffness. Compared bearing force of vibration isolator on flexible base with bearing force on rigid base, the results could be gotten that flexible base had important influence to bearing force of vibration isolator and free vibration influenced by base’s flexibility might become main factor to influence change of vibration isolator’s bearing force.

• Periodical: Advanced Materials Research (Volume 462)
• Pages: 419-426
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.462.419
• Online since: February 2012
• Authors: Guo Qian Zhao, Hong Tian Zhang, Rui Guang Geng
• Keywords: Combustion Engine, Flexible Base, Vibration Isolation

References

[1] WEI Cun-yuan, ZHANG Wei-dong, GE Yun-shan. Higher Combustion Engine [M]. Beijing: Beijing industry university press, (2001).

[2] Wu N, Liao R D, Zhang B C, Zuo Z X. Multi-body system dynamics analysis of the crank and connecting rod mechanism in diesel engine[J]. Chinese Internal Combustion Engine Engineering, 2005(5): 69-73.

[3] Hao Z Y, Lin Q, Duan X B. Analysis on crankshaft system's dynamical behavior based on simulation and experimental method [J]. Chinese Internal Combustion Engine Engineering, 2006(1): 38-40.

[4] Zhou J P, Zhang Z Y, Feng G P, Hua H X. Modeling and simulation of active-passive vibration isolation of machinery with flexible base[J]. Journal of vibration and shock. 2008(11): 99-102.

[5] Mechanism design handbook editor committee. Mechanism design handbook. coupling, clutch and arrester[M]. Beijing: mechanical industry press, 2007: 85-93.

[6] Johnson K L, Contact Mechanics [M]. Cambridge: Cambridge University Press, 1985: 155-158.