The Handling Stability And Ride Comfort Simulation And Test Research Of Bus With Air Spring

Preface Multi-body System Dynamics, that includes Multi-rigid body System Dynamics and Multi-flexible body System Dynamics, is a science that researches multi-body's movement rules. Generally, multi-bodies are connected by flexible bodies and rigid bodies. The virtual prototype technology had the rapid development with the development of computer science technology. Now, mechanical engineers often use virtual prototype technology in the mechanical products' design process, which much shorten the design period and reduce the making and debugging cost compare with the traditional method. Based on the theory and account method of Multi-body System Dynamics, a bus with air spring of Multi-body System Dynamics model is built by using the ADAMS/Car software. The dissertation did the handling stability and ride comfort simulation analysis. Combining the non-linear flexibility of air spring, the bus's performance is full estimated by comparing with the test result. Main Contents Chapter one is the introduction of this dissertation. Based on large numbers of related books, Multi-body System Dynamics is detailed discussed in the process of research, development and appliance in vehicle. The dissertation discusses the air spring's development history, appliance actuality, and then introduces the estimate method of handling stability and ride comfort flexible characteristics. At last, giving the content and meaning of this dissertation. Chapter two systematically introduces the mechanical theory of Multi-body System Dynamics related with the software of ADAMS. First, the chapter briefly introduces the software and its components; then discusses its analysis and calculate methods; finally, giving some solving skills for the radiation of numerical value. Chapter three introduces the nonlinear characteristic of air spring and its effect on the full vehicle's performance. Then discusses the structure forms of air spring suspension, obtained the static flexible characteristic curve of air spring by test. Bases on the structure form, air spring suspension can be divided into three forms: independent suspension, dependent suspension and float axle. Based on the oriented framework, air spring suspension's oriented framework can be divided into five forms: mixture with leaf spring, single longitude arm, A shape, double transverse arms and double longitude arms. The related structures' character is discussed of this chapter. Finally, the chapter introduced the air spring's and shock absorber's test process and its results in detail. Chapter four discusses the establish process of bus module. It is briefly introduce the process of build modules and parameters that obtained in ADAMS/Car. It is introduced the subsystems' build process of air spring suspension of bus: front suspension subsystem, rear suspension subsystem, steering subsystem, body subsystem, engine subsystem and tire subsystem. The subsystems' structure and restrict are analyzed in this chapter. Chapter five is the part of handling stability simulation and test analysis of bus. First, introduces the steady static circular and pylon course salon process in detail. Combining the flexible characteristic of air spring, compared the simulation result with the test result, and then scores them by national standard. Chapter six is the part of ride comfort simulation and test analysis of bus. First, introduces ride comfort road of B class's building process; then, introduces the ride...