基于控制算法的珠优化方法对提高手机壳体刚度的优化设计

Optimization design for improving mobile phone stiffness by bead optimization method based on controller arithmetic

以铝合金手机后壳为研究对象,采用珠优化方式对其刚度进行了优化设计。以单元最大应变能为优化目标函数,在特定的设计响应和约束条件下,通过将目标函数最小化优化,实现手机壳刚度的最大化优化目标。分别探讨了6组最大珠宽度为2,3,4,6,10和20 mm的优化结果。结果表明,手机壳刚度与珠状结构宽度呈非线性关系,珠状结构的宽度小于8倍单元边长时,优化后的壳体刚度值随着宽度的增加而增大,当珠状结构的宽度大于8倍单元边长时,优化后的壳体刚度值随着宽度的增加而减小。

Focused on aluminum alloy mobile phone shell,the stiffness was optimal designed by using bead optimization method. Taking the maximum element strain energy as objective function,and under a specific design response and constraint condition,the optimization objective of maximum stiffness of mobile was realized through the optimization of minimize the objective function. The optimized results of six groups of maximum bead width including 2,3,4,6,10 and 20 mm were discussed. Result shows that the relationship between stiffness of mobile phone and bead width is nonlinear. With the increase of maximum bead width,the stiffness of mobile phone increases when the width is lower than 8 times of average element length,and decreases when the width is higher than 8 times of average element length.