一种转向架构架扭曲载荷测试方法

A Test Method for Twist Load on the Bogie Frame

TB/T 3549.1—2019《机车车辆强度设计及试验鉴定规范转向架第1部分:转向架构架》给出了扭曲载荷的定义,但未明确转向架构架在扭曲载荷条件下开展静态试验和疲劳试验的测试方法。依据转向架构架实验室测试条件和JIS E 4207—2019《铁路车辆转向架转向架构架设计通则》,提出一种无一系弹簧条件下测试转向架构架刚度,来完成扭曲载荷试验的方法。详细论述转向架构架扭曲载荷与变形量关系、扭曲刚度测试原理,并对比西南交通大学和实验室扭曲刚度测试方法。有限元软件分析计算结果表明,2种测试方法的误差都控制在6%之内,采用实验室扭曲刚度测试方法,开展加载扭曲载荷试验,用以评估转向架构架结构强度更安全。

TB/T 3549.1—2019 Strength design and test accreditation specification for rolling stock—Bogie—Part 1:Bogie frame provides the definition of twist load but does not specify the testing methods for static and fatigue tests un⁃der it.According to the testing conditions of bogie frame laboratory and JIS E 4207—2019 Rolling stock—Bogie—General rules for design of bogie frame strength,a method for testing the stiffness of bogie frame with primary spring is proposed to complete the twist load.The relation between twist load and deformation amount and the principle of twist stiffness measurement are discussed in detail.The test methods of twist stiffness between Southwest Jiaotong Universi⁃ty and laboratory are compared.Finite element analysis software finite element analysis and calculation results show that the error of the two test methods is controlled within 6%,and it is safer to carry out the twist load test to evaluate the strength of the frame structure by using the test method of twist stiffness in the laboratory.