关键词: 悬架弹簧；弹簧运动包络；柔性件仿真；Cosserat 弹性杆理论

Abstract: Automobile suspension spring is an important part of the suspension system, its main function is to support the upper body and ease the impact. Because it is difficult to obtain the actual motion envelope of the spring, the automobile spring motion envelope simulation industry generally uses three-dimensional software to draw several forms during the movement of the spring. However, this method fails to consider the material characteristics and forces of the spring, so the accuracy of the envelope is not high. To solve the above problems, this paper proposes a flexible motion simulation analysis method of spring, which takes into account the shape, force and material characteristics of the spring, and can effectively improve the precision and efficiency of the spring envelope production. It is of great significance for weight reduction, cost reduction, performance improvement and compact layout of hem arm and related components.

Key words: Suspension spring; Spring motion envelope; Flexible parts simulation; Cosserat elastic rod theory