Correlation Research Between Gondola Car Body Structure And Weld Stress Based On Asymmetry Coefficient

In order to find out the root cause of cross bearer welds’ cracks on the general purpose gondola cars, the relationship between asymmetric structure and stress distribution is studied in this paper. Firstly, the concept of asymmetry coefficient is proposed, and the asymmetric coefficients’ calculation methods of independent and dependent variables are given respectively in two-dimensional space. Secondly, according to the different positions of side column 1 and side column 2, 30 local models are established, the cross bearer weld stresses are extracted after finite element simulation, and the stress distribution clusters are formed. Finally, the asymmetry coefficients of the side columns are calculated, and the correlation between the positions of the side columns and the weld stresses is studied by the methods of Pearson correlation coefficient and complex correlation coefficient. The results show that the correlation between the stress of cross bearer weld 2 and the positions of the side columns is much higher. This research can not only provide an important basis for the structural optimization of 80t gondola car body, and it also provides reference for the structural design of the gondola car body.