Dynamic Optimal Design Of The Cab Of Heavy Commercial Vehicle Under Full Vehicle Environment

The dynamic design of the cab of the truck for full vehicle was discussed. Inthe analysis, FE model of full truck was established. The contents wereorganized as follows. In the first chapter, a brief review of the state art of thedynamic design was given. The second chapter presented the dynamic theoryfor the structures including structural stiffness sensitivity and generalizedinverse iterative method. In the third chapter, the FE model of a full truck wasestablished in which the cab and its support springs, the frame, the body, andthe support springs are included. The model parameters of the full truck werecomputed and the modal stiffness of the components was also obtained. Theforth chapter presented the comparison of two analysis models for the dynamicoptimal of the cab of the truck. The ride comfort of the full truck was discussedincluding random response analysis, road spectrum input, the analysis of theoutput, response spectrum of the cab, the comparison of the response RMSvalue for two loading conditions of the truck. In the chapter five, the dynamicdesign and the light weight design of the cab were presented. The modalstiffness contributions of the cab structure and its support spring to the fulltruck were computed, and the modal stiffness sensitivities were also obtained.The optimization of the cab structure and its support spring stiffness weredeveloped under full truck environment were presented. The light weightdesign of the cab was given. In the chapter six, the conclusions of the studywere drawn. The satisfied results of the optimal dynamic property and lightweight design were obtained. The results show that the presented method, thegeneralized inverse iterative based on modal stiffness sensitivity is effective and valid for the large complex structures in engineering.