地铁转向架制动载荷识别与分布特征研究

Study on Brake Force Identification and Distribution Characteristics for Metro Bogie

轨道交通车辆在城市的应用越来越多,且制动频次相对较高,制动载荷识别与分布研究至关重要。借助有限元分析,确定了信噪比较高的载荷识别测点并获得测点的应力动态响应特性。通过对应力响应测试数据进行频谱分析,确定了合适的载荷识别方法。用"雨流计数法"编制了线路实测制动载荷谱,得到了制动载荷谱的威布尔概率密度曲线,为今后转向架构架的设计分析提供载荷依据。

The study of brake force identification and distribution characteristics is increasingly important by the reason of its high brake frequency as well as the widespread metro use in the city. In this paper, high SNR force identification test points and their stress dy namic response characteristics are confirmed based on FEA method. An appropriate force identification method is adopted after the frequency spectrum analysis of stress response data. This study gains the operation brake force spectrum by rain-flow counting method, and the Weibull density distribution curve. Both are the design basis for the metro bogie in the future.