基于轨道扣件系统力学特性的动态拧紧策略设计

Design of Dynamic Tightening Strategy Based on Mechanical Characteristics of Rail Fastener System

对扣件系统进行受力分析,并与普通螺栓连接进行对比分析拧紧过程的不同点;对扣件弹条进行有限元仿真,观察弹条的扣压力变化特性,并设计扣压力试验和拧紧力学实验,研究扣件系统拧紧力学特性;基于扣件力学规律设计相应的动态拧紧策略,并通过实验验证了算法的可靠性和有效性,可有效提高拧紧扭矩的质量。

The stress of fastener system is analyzed, and the difference of tightening process is compared with that of ordinary bolt connection. The finite element simulation of fastener spring bar is car-ried out to observe the change characteristics of spring bar’s buckle pressure, and the buckle pressure test and tightening mechanics test are designed to study the tightening mechanics cha-racteristics of fastener system. The corresponding dynamic tightening strategy is designed based on the mechanical law of fastener, and the experiment is carried out, the reliability and effectiveness of the algorithm are verified, which can effectively improve the quality of tightening torque.