Parameters Analyses and Identification of Rubber Bush Based on Theoretical Dynamic Model with Effects of Temperature and Preload 2019-01-1272
A Series connection KVBC (Kelvin-Voigt and Boscawen) theoretical model of rubber bush in automobile suspension is established. Numerical calculation model is also built up through Matlab/simulation and 9 parameters are raised and identified. Experiments on bench of rubber bush are carried out for dynamic and static characteristics and supply enough and reliable data for parameters identification. Based on that, preload and temperature are taken into consideration in ordinary KVBC model as two important additional factors. As a result, it leads to regenerate a novel one with new parameters identification, which is validated under other different conditions. This new modeling way of rubber bush has three advantages. First of all, it shows much preciseness for solving non-linear problems in multi-body calculation for researches and vehicle engineers. In addition, this new way leads to a very important step of choosing appropriate bush model type before analyzing, which depends on preload value. The last one is the model can be used to deal with real occasions with temperature change around rubber bushes during simulation, which has been studying these years for automobile NVH performance vs. temperature.