輪型重車液氣壓式懸吊系統與車體結構之分析與優化

Abstract

本研究以輪型重車的液氣壓式懸吊系統與車體結構為研究對象，建立一套優化設計流程來針對車輛操控性與舒適性進行懸吊系統參數設計，以及對車體結構進行優化設計使達到強度需求並提升結構剛性。首先依據現有的測試平台進行實驗的規劃，並由測試結果來驗證與修正模型，接續透過懸吊系統的振動分析、車體結構的靜動態結構分析以及整車動態模擬來探討原始設計之性能。藉由整車動態模擬了解車輛在行駛過程中的動態響應，並發現在特定負載條件下可能會對部分車體結構產生破壞。因此本研究藉由結構最佳化(Structural optimization)方法對原先可能會造成破壞的車體結構進行優化，達到同時滿足強度與剛性提升的目標需求。另外針對車輛所行駛的道路環境與使用需求，本研究嘗試對現行的懸吊系統進行參數設計，使車輛在相同運行條件下擁有較佳的舒適性與操控性能，進而提升輪型重車的承載性能並提供作為懸吊系統性能改善之依據。

In this thesis, the hydro-pneumatic suspension system and body structure of the wheeled heavy vehicle are studied. Through the establishment of a set of optimization design process, to design the parameters of the suspension system for vehicle handling and comfort, as well as to optimize the design of the body structure to achieve strength requirements and enhance structural rigidity. First, according to the existing test platform to plan experiments, and then the test results are used to verify and modify the model. And, the performance of the original design are discussed by the simulation analysis. Next, through the vehicle dynamic simulation to get the vehicle dynamic response during the driving process, and found that part of the body structure may be damage under specific load conditions. Therefore, this thesis uses structural optimization method to optimize the structure of the vehicle body, let the structural strength and rigidity are both meet the requirements. In addition, this thesis designs suitable suspension parameters for different road environment and the operation needs of the vehicle, which make the vehicle in the same operating conditions to be more comfortable and with high handling performance, improving the carrying capacity of the wheeled heavy vehicles. And, the design parameters provide the basis for improving performances of the suspension.