- 學位論文
建置自行車結構材料參數之擷取系統
The construction of parametric extraction system for the Structure of bicycle
摘要
因自行車材料結構在經過加工處理過後會產生極大的變化，連帶使得結構材料參數不容易掌握並影響有限元素分析之精確性。故本研究欲建置一套自行車結構材料參數之擷取系統來模擬實際自行車整體結構之等效材料參數以供有限元素分析使用。其方法為首先進行結構模態實驗，擷取振動頻率之結果來修正有限元素分析之材料參數使有限元素分析之頻率更趨近於實驗結果，藉此擷取出自行車之實際等效材料參數。 研究結果顯示經過加工處理過後會影響每台車架結構之彈性係數，且一般型自行車車架結構之彈性係數比小型自行車型來的大。座位處有補強且焊接處增加之車架結構，其材料彈性係數比較高，且自然振動頻率也較高。
並列摘要
Due to the manufacture process, material structure of bike will greatly change and cause the structure of the material parameters is not easy to obtain. Thus, the inaccuracy of finite element analysis is occurred. The purpose of this study is to build a bike whole structural material parameter acquisition system to simulate the actual structure of the equivalent material parameters of a bike for finite element analysis used. Firstly, modal experimental test is conducted to obtain the frequency of structure of bike. Then, the results finite element analysis is modified to close the experimental results and to simulate the equivalent material parameters of the actual bike. The results show the elastic modulus of structural of bike will be affected by manufacture process, and that of the general bike is greater then the small bike. Moreover, Seat with reinforced and welded treatment get higher elastic modulus and higher natural vibration frequency.