Simulation Of Damping Characteristics In Automotive Double-Tube Shock Absorbers

In recent years, the demand of automotive parts'quality is increasing with the development of automotive industry. Vehicle shock absorbers play a very important role in vehicle handling, stability and ride performance, which has a key effect on the competitions in automotive industry. However, design tools in the domestic shock absorber plants, which finish the product development by themselves, are still very limited. They use the traditional design method based on physical prototype and testing, which has a long development cycle and high cost. This method can not fulfil the requirement of current automotive parts industry, and a simulation-based design new method for shock absorber is necessary.In order to improve the method of shock absorber design and improve our capability for designing shock absorbers by ourselves, a dynamics simulation method based on ADAMS has been used for completing the new product analysis and design accurately and efficiently. An automotive shock absorber model has been set up in virtual prototype simulation. The damping performance has been analyzed in the simulation. The simulation method has been correlated with the physical prototype test, and the accuracy and efficiency has been proved. Combining the computer-aided design, analysis and evaluation methods, a systematic shock absorber design method has been built up, and a software system for shock absorber design and analysis has been successfully developed.The works include:(1) The structure of a shock absorber has been analyzed, and a simplified model has been built up. Based on ADAMS software and ADAMS/Hydraulic plug-in, a virtual prototype for this shock absorber has been built up.;(2) Based on the shock absorber model, a simulation has been finished and the shock absorber's damping characteristic has been achieved. The simulation result has been correlated with the physical prototype test data, and the accuracy and efficiency has been proved. The effect mechanism for the model parameters to the shock absorber damping performance has been studied in detail. Hence the design demand can be fulfilled by adjusting the valve structure parameters. (3) A software system for modeling and simulating shock absorber's damping performance has been developed based on ADAMS. Based on this software system, the design and analysis work for shock absorbers can be finished flexibly and rapidly, and the efficiency of shock absorber development can be greatly enhanced.