The main contents of CAE analysis of automobile structure are as follows: 1. The composition of automobile body structure is very complex, which brings great difficulties to CAE analysis of automobile, especially structural modeling. The model is too simple to reflect the actual characteristics of the structure, which affects the analysis accuracy and the reliability of the results. Although the model is too complicated, it can improve the accuracy to a certain extent, but it increases the calculation period and is not convenient for structural optimization.

2. The use conditions are complex, which makes it difficult to determine the calculation conditions and effective calculation loads. Although the calculation conditions are too harsh, it can improve the reliability, but it may lead to overweight structure and increase the manufacturing and use costs. Otherwise, it may not meet the needs of some purposes.

3. The manufacturing process has a certain influence on the performance of the car body structure.

Influence of stamping process on structure and performance of car body;

Modern automobile body parts are mostly made by cold stamping. Cold stamping has many advantages, which everyone has learned in previous courses. However, from the structural analysis, the thickness of each part of the body parts processed by stamping process changes greatly.

This change law is related to the surface shape of the die and the forming process conditions. Sometimes local thinning is very serious, and designers can't predict and control the law of this change. This has certain influence on the strength, stiffness and dynamic characteristics of the structure.