摘要
采用Sobol′指数法,将全局灵敏度分析方法应用于一种轨道车辆吸能薄壁管耐撞性分析当中.以总吸能量和接触力峰值作为目标响应,构建Kriging代理模型,分析薄壁管中各筋板、横档等输入参数对目标响应的影响程度,辨别出对吸能性能影响较大的参数,并将其安装在轨道车辆上与原结构进行对比.结果表明:Sobol′法与Kriging代理模型相结合能有效的分析碰撞试验中各输入参数的灵敏度,为优化设计提供有力参考,降低相应实验的设计周期和难度.
The Sobol` index method is used to apply the Global Sensitivity Analysis(GSA) to the crashworthiness analysis of a thin-walled tube applied to the rail vehicles. The total energyabsorption and the contact force peakare set as the target response to construct the Kriging surrogate model, and the impact of the input parameterssuch as stiffener board and transom of the thin-walled tubeon the response of the targetis analyzed. The parameters which have the important influence to the energy absorption performanceare identified and compare with the original structure. The results show that the combination of the Sobol` index method and the Kriging surrogate model can effectively analyze the sensitivity of the input parameters in the collision test, which provides a powerful reference for the structural optimizationand reduce the design cycle and difficulty of similar experiment.
引文
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