摘要
铁路货车整车静强度、冲击强度等在出厂前均已通过相关试验验证,符合相关标准和文件的规定。但是在实际应用中,底架附属件及制动管系仍出现破坏现象。针对这个问题,分析既有应力预测方法弊端,提出采用随机振动分析方法开展分析。阐述随机振动分析方法的适用性、基本原理,以及基于随机振动分析结果的结构评定方法,并采用随机振动分析方法预测底架附属件及制动管系可靠性。结果表明,该方法能够准确预测底架附属件及制动管系的可靠性。同时指出,随机振动分析方法计算量较大,对于铁路货车来说,有限元模型不宜过大。
The static strength and impact strength of railroad wagons have been verified by relevant tests before leaving the factory, and they conform to the relevant standards and documents. However, in the actual application, the damage phenomenon still occurs in the underframe appendages and brake system. In response to this problem, the existing stress prediction method was analyzed.In order to solve this problem, the paper analyze the shortcomings of the existing stress prediction method and propose to use the random vibration analysis method to carry out the analysis.The applicability and basic principle of the random vibration analysis method, as well as the structural evaluation method based on the random vibration analysis results, are described. The results show that the reliability of the underframe appendages and brake system system is predicted by the random vibration analysis method. At the same time, it is pointed out that the random vibration analysis method is computationally intensive, the finite element model should not be too large for railway wagon.
作者
朱丽
贺茂盛
戴安国
ZHU Li;HE Maosheng;DAI Anguo
出处
《铁道技术监督》
2022年第7期32-36,共5页
Railway Quality Control
关键词
货车
底架附属件及制动管系
动应力预测
随机振动分析
强度设计
Railway Wagon
Underframe Appendage and Brake Pipe System
Dynamic Stress Prediction
Random Vibration Analysis
Strength Design
