Finite Element Stress Analysis for the Coupling Hook of Schnable Car

The load capacity of maximum load schnable car in our country is 380t. The fixed bearing device of corollary use for this type schnable car is specific coupling hook of generator stator. It has been used for several times and the running distance exceeds 0.02 million kilometers. Because of the condition limits such as welding technology, welding condition, welding experience and heat treatment level, etc. at that time in our country, the defects such as crack etc. that due to the manufacturing process are exposed in use. In the flaw inspections prior to multiple transportations, new cracking defects are found and the harm can not be ignored. According to the features of railway schnable car and coupling hook, stress analysis of static load and dynamic load for the schnable arms and coupling hooks of schnable car are simulated. Operational loading conditions of the coupling hook are determined and the load cases are calculated. By using the finite element software package ANSYS, the whole structure of coupling hook is built. The structure is discrete by solid element. Under the condition of different load cases, the structural stress of coupling hook is calculated. This article analyses and defines the critical dangerous parts of coupling hook in order to strengthen the flaw inspections and the safety monitoring during transportation of critical dangerous parts, as well as research the anti-fatigue performances of coupling hook.