基于CFD理论的变容积空气悬架系统动刚度特性与匹配理论

项目名称： 基于CFD理论的变容积空气悬架系统动刚度特性与匹配理论

项目编号： No.51305111

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 李美

作者单位： 海南大学

项目金额： 26万元

中文摘要： 结合流体力学、热力学和空气动力学理论，构建带附加气室空气弹簧系统的动力学模型，研究系统的振动响应特性；基于CFD理论，引入动网格技术，对变容积附加气室空气弹簧系统内部气体流动进行数值计算，模拟系统内部的气体流动，分析其流场特性；探索弹簧系统动态特性产生机理，研究动刚度的求解方法，构建空气弹簧的动刚度特性理论；利用多体动力学理论与方法，建立空气悬架系统动力学模型，分析空气悬架系统对车辆综合性能的影响；综合车辆行驶平顺性、操纵稳定性和道路友好性等三方面的性能，构建系统性能的综合评价指标，确定优化目标函数，探索空气悬架系统的匹配理论；提出从空气弹簧刚度特性理论研究到悬架系统参数间匹配优化的学术思想和理论方法，实现空气悬架系统的良好匹配，以提高车辆的综合性能，为空气悬架系统特性的研究及在车辆上的应用奠定理论基础。

中文关键词： 空气悬架；CFD；变容积；动刚度；匹配

英文摘要： A dynamic model of air spring with auxiliary chamber will be set up based on theories of aerodynamics, fluid mechanics and thermodynamics. The vibration response of the system can be analyzed. The CFD theory and dynamic meshing technology will be applied to simulating the flow in the air spring with variable volume chambers, and the flow field characteristics can be analyzed. The mechanism of dynamic characteristics for the spring system with auxiliary chamber will be explored. The solving method of dynamic stiffness will be studied, and the dynamic stiffness theroy will be established. The dynamic model of air suspension system will be built with multi-body dynamics theory. The comprehensive effect of air suspension system on vehicle performane can be analyzed. The general index will be determined through combination of the ride performance, handling stability and road friendliness, then the optimal function will be set up to analyze the matching theory of air suspension system. New idea and new method of air spring dynamic stiffness and parameter matching of the suspension system are put forward, and the parameters of the suspension system will be well matched to improve vehicle performance. It will lay the theoretical foundation for further study on characteristic of air suspension system and its application.

英文关键词： air suspension；CFD；variable volume；dynamic stiffness；matching