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以ＣＷ－２００型转向架为研究对象，根据提速试验时的动应力实测数据，对构架动应力的频谱特性进行了分析研究．首先根据各测试点的动应力测试结果整理得到构架动应力较大的部位，然后分析了在不同速度、不同路况条件下这些部位频谱特性的变化规律；同时，采用有限元方法计算了构架在弹性约束下的模态，并对构架的应力响应与结构动态特性之间的内在联系进行了初步探讨．
Taking CW-200 bogie as the research object, the spectrum characteristics of structural dynamic stress were analyzed based on the measured data of dynamic stress in speed-up test. Firstly, according to the dynamic stress test results at each test point, the dynamic stress of the frame is larger and larger, and then the variation of the spectrum characteristics at different speeds and different road conditions is analyzed. At the same time, the finite element method Constrained mode, and the intrinsic relationship between the structural stress response and the structural dynamic characteristics were discussed.