汽车顶部覆盖件抗凹及抗压性能分析

Analysis on the Anti-concave and Compressive Performances of Cover Parts on the Top of a Automobile

为避免汽车顶部覆盖件因在网格划分过程中存在不合格单元,而造成有限元模型分析结果准确性差且耗时较长的问题,本文探索出一种新的汽车顶部覆盖件抗凹及抗压性能分析方法,该方法通过高质量的网格划分和材料参数提高汽车顶部覆盖件有限元分析模型的精准度,并通过对比实验测试其有效性。结果证明:该方法的分析结果准确率明显高于传统方法,且分析过程耗时较短,分析效率更高。随着压边力的增大,汽车顶部覆盖件的凹痕深度不断增加。对于同种材料,采用在一定压边力范围内较大的压边力,汽车顶部覆盖件的抗凹性越好,但当压边力过大时,抗凹性能增加效果下降;随着载荷力的增大,汽车顶部覆盖件的关键部位的变形也越大,顶压过程中各关键结构受最大变形量和截面力两个因素的影响最大。

In order to avoid the roof covering parts due to exist in the process of meshing unqualified unit,caused by the finite element model analysis results in accurate and time-consuming longer problem,this paper explored a new car at the top of the covering parts concave and compressive resistance analysis method,this method through the mesh of high quality and the material parameter improve car top cover parts for accuracy of finite element analysis model,and through the contrast experiments to test its validity.The results show that the accuracy of the analysis results of this method is obviously higher than that of the traditional method.With the increase of the blanking force,the depth of the indentation of the car top cover increases.For the same material,the greater the blanking force within a certain range of blanking force is used,the better the anti-concave property of automobile roof covering parts is,but when the blanking force is too large,the anti-concave property increases and the effect decreases.With the increase of the load force,the deformation of the key parts of the covering parts on the top of the vehicle is also larger.