折叠式自行车车架有限元模拟分析

Finite Element Simulation Analysis of Foldable Bicycle Frame

自行车的结构设计对其行驶安全性及舒适性至关重要。以某型号折叠式自行车车架为例,利用SolidWorks软件构建三维模型,将其导入ANSYS Workbench软件建立有限元模型,并对其进行静力学与模态分析。结果表明,折叠式自行车的最大应力出现在折叠机构的固锁销处,为442.57 MPa,最大变形出现在横梁和立管顶端,为0.879 mm。车架的前9阶固有频率为82.01~534.67 Hz,远高于自行车正常行驶时的动态激励频率,说明不易发生共振问题,所得结果可为折叠式自行车的结构优化提供参考。

The structural design of bicycle is important for its driving safety and comfort.The study takes a foldable bicycle frame as an example,builds 3D model with SolidWorks,imports it into ANSYS Workbench to establish a finite element model,and does statics and modal analysis.The results show that the maximum stress is 442.57 MPa at the lock pin of folding mechanism.The maximum strain is 0.879 mm at the crossbeam and the top of standpipe.The first 9 order natural frequency of the frame is 82.01~534.67 Hz,which is much higher than the dynamic excitation frequency when it is running normally.Resonance is not easy to occur.The results can provide the reference for the structural optimization of foldable bicycle.