基于等效静态载荷法的电动自行车车架冲击强度优化

Optimization of impact strength of electric bicycle frame based on equivalent static load method

为提升电动自行车车架的冲击强度且保证其轻量化,首先依据标准对车架开展了冲击仿真,获取车架的动态响应;然后利用等效静态载荷法计算得到的静态载荷,对车架进行静态仿真,并与动态仿真下车架的应力和变形进行对比分析,对比结果一致性较好,验证了静态载荷具有等效性;最后采用等效静态载荷,对车架冲击强度进行优化。结果表明,车架的冲击强度得到明显提升且质量降低,实现了车架冲击强度的优化设计。该研究为电动自行车车架的设计提供了参考。

Equivalent static loads method(ESLM)is introduced to study the optimization of impact strength of electric bicycle.Firstly,the impact simulation of the frame is carried out according to the standard to obtain the dynamic response of the frame.Then the calculated static load is used to simulate the frame statically,and the stress and deformation are compared with those under dynamic simulation.The equivalence of static load is verified.Finally,the impact strength of the frame is optimized by using the equivalent static load method.The results show that the weight of the frame is reduced and the impact strength of the frame is significantly improved.It verifies that the equivalent static load method can realize the optimal design of impact strength of frame structure.It provides a reference for the optimal design of frame impact strength.