| Abstract: | 目的：本研究旨在應用有限元模態分析方法分析木製木球球杆與球的相關力學特性。方法：直線球揮杆實驗後經運動學分析獲得球杆與球之間的衝擊初速度。利用木製球杆和球的幾何尺寸和材料參數，在Solidworks中構建等效數學模型，運用ABAQUS進行模型驗證，以獲得了模擬結果。結果：經過運動學的測量與分析，獲得球的衝擊後初速度均值為10.0 m/s，球杆槌頭與球的碰撞速度為9.8 m/s，經載入模型後發現最大應力5.0MPa集中在球杆的近槌頭端處區段內。球的碰撞壓力最高可達2.1MPa。結論：模型載入驗證球杆最大應力位置與實際使用中球杆發生折損位置吻合。可以在這部分進行一些強化設計，以減少折損的發生率。另一個重要的發現是，球杆槌頭與球的接觸面積非常小，局部壓強非常大，規則允許範圍內，提高球的木質密度來減少球的損壞。
To analyze the relevant mechanical properties of woodball mallet and ball by applying numerical methods. Methods: The collision speed between ball and mallet was from the experiment of motion analysis. The structures of woodball were constructed in Solidworks to form the solid models, and the numerical model was analyzed in ABAQUS to acquire the simulation results. Results: 10.0m/s impact speed of the ball which was measured from the normal swing stage, was applied to simulate the loading condition. While the speed of collision between ball and mallet head was 9.8 m/s, which was calculated from swing process of motion analysis. As the maximal stress (5.0MPa) of mallet was concentrated in the proximal part of bottle. Conclusion: The maximal stress was concentrated in the proximal of the bottle, which was in good accordance with the mallet fracture happened in real performing event. Some enforcement design could be carried out in this part to reduce the fracture incidence. Another important inding is the contact area at the mallet head was really small. The local pressure was very high (2.1MPa), which can easily lead to damage. So, manufacturer should choose high density wood to process ball in order to reduce the ball damage rate. |
