本文利用有限元素分析軟體,探討配置優力膠之新型車輪與傳統車輪之間的差異。靜態分析部份依照中華民國國家標準的自行車輪圈檢驗法,檢視是否符合其規範要求,其次觀察受到不同的靜態負載時,車輪的最大變形量與最大應力值等。動態分析部份探討自行車車輪碰撞到障礙物,以及不同車速下通過正弦坡路面的位移變化。由模擬結果顯示,新型輪圈與傳統輪圈皆符合中華民國國家標準的自行車輪圈強度規範。新型車輪與傳統車輪即使靜態負載增加至60 kgf或是行駛時撞到障礙物,結構架與優力膠的最大應力仍在材料強度的安全範圍內。新型車輪由於配置優力膠使得受到靜態負載時,新型車輪的最大變形量比傳統車輪大。新型車輪碰撞到障礙物時,騎乘者所感受到的位移量皆比傳統車輪在相同條件下所感受到的位移量小;但在不同車速下通過起伏不大的正弦坡路面時,優力膠的效果則較不顯著。綜合靜態與動態分析,將優力膠應用於自行車車輪上以吸收動態負載是可行的。
This thesis uses a finite-element-analysis software to investigate the difference of performance between a traditional bicycle wheel and a new bicycle wheel that includes the use of polyurethane rubber (PU). In static analysis, the thesis is to check the strength of bicycle rims according to bicycle rim testing mthods in the Chinese National Standards(CNS). The two kinds of bicycle wheels are also analyzed under different static loads to see the variation of maximum stress and deformation. In dynamic analysis, this thesis is to investigate the displacement time responses of bicycle wheels under impact loads of obstacles and base excitations of sinusoidal road waves. The simulation results show that both traditional and new bicycle rims are satisfied with the requirements of CNS. Due to the use of PU, the maximum deformation of the new bicycle wheel under static loads is larger than that of the traditional bicycle wheel. In addition, the new bicycle wheel can make bicycle riders feel less displacement variation under impact loads of obstacles than the traditional bicycle wheel. As a result, the application of using PU in bicycle wheels to absorb dynamic loads is practicable.