基于应变能分析的白车身结构胶布置优化

摘要

为提高某白车身弯曲和扭转刚度,在不改变其结构的前提下,引入了焊接结构胶和点焊混合连接的手段,并提出通过分析车身应变能分布形式决定结构胶分布的方法,得到了优化的结构胶布置方案.与原结构相比,优化结构胶布置位置后,以最少的结构胶胶线获得了较高的白车身弯曲和扭转刚度,BIP弯曲刚度提高11％,扭转刚度提高5％; BIW弯曲刚度提高10.7％,扭转刚度提高6％.%In order to improve BIW bending and torsional stiffness, a method which combines welding structural adhesive and spot welding without changing its structure is introduced, and the method which decides structural adhesive distribution by analyzing body strain energy distribution form is proposed, and the optimized structural adhesive layout plan is obtained. Compared with the original structure, the optimized structural adhesive location gets a high BIW bending and torsional stiffness with the least structural adhesive, BIP bending stiffness is improved by 11%, torsional stiffness by 5%; whereas BIW bending stiffness is improved by 10.7% and torsional stiffness by 6%.