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针对国内首次凹底平车凹底架折角设计方案，提出了１∶３模型模拟试验方法，设计制造了模型及加载装置，通过测试，将模拟试验与有限元结构强度及刚度分析结果进行了对比分析研究。得出了折角式凹底架的应力分布及设计重点。
Aiming at the design scheme of the concave angle of concave frame for the first concave flat car in China, a 1: 3 model simulation test method is proposed. The model and the loading device are designed and manufactured. The results of the simulation and finite element structural strength and stiffness analysis are compared Analysis. The stress distribution and design focus of the angled concave chassis are obtained.