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-  2016 

基于Morris法分析的液压参数对互联悬架的影响

Keywords: 车辆工程,液压互联悬架,功率谱密度,灵敏度分析 Morris法
vehicle engineering hydraulically interconnected suspension power spectral density sensitivity analysis Morris

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Abstract:

针对液压参数对液压互联悬架输出响应影响强度大小的问题,在Matlab中建立了液压互联悬架半车侧倾耦合频域模型,根据系统的传递函数和路面输入得到了垂直和侧倾输出加速度谱密度并将其与传统悬架进行对比,分析对比结果.采用Morris灵敏度分析方法计算得到各液压参数的灵敏度值并进行灵敏度排序.结果表明,由于在侧倾振动中液压油频繁地流进和流出蓄能器,蓄能器参数及与蓄能器连接的阻尼阀压力损失系数对侧倾振动模态有较大影响;与作动器上下腔连接的阻尼阀压力损失系数对垂直振动模态有较大影响,所得结果为进一步的悬架优化中设计变量的选取提供了理论依据.
To solve the problem of how the degree of hydraulic parameters influences hydraulically interconnected suspension response, a hydraulically interconnected suspension roll frequency domain model was set up by using the Matlab.Bounce and roll acceleration output spectral densities were obtained and compared with the traditional suspension,and the results were analyzed.By applying the method of local sensitivity analysis called Morris, the influence degree of hydraulic parameters on bounce response and roll response was obtained.The results indicate that, because the liquid flows in and out of the accumulator, the accumulator and the valves connected to it have a great impact on the roll vibration model, and the valves connected to the hydraulic chambers have a great impact on the bounce vibration model.This paper provides a theoretical basis for suspension optimization.

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