- 學位論文
複合型雨刷之模型驗證與碰撞模擬
Model Verification and Impact Simulation of Hybrid Wiper Blade
摘要
雨刷是主要用途於清除擋風玻璃上的雜質及雨水，使駕駛人能夠有清晰的視線。雨刷品質檢測是一個重要議題，特別是雨刷碰撞試驗，其中雨刷之塑性變形不能超過規定範圍，本文研究目的在於，以電腦輔助工程分析(CAE)技術模擬雨刷之碰撞動態情形，以預測雨刷受碰撞後，可能會造成塑性變形或應力集中位置。由於複合型雨刷零組件繁多且複雜，首先必須了解雨刷上主要結構組成與零件之材料參數，運用有限元素分析(FEA)與實驗模態分析(EMA)進行雨刷單一零件之模型驗證，確認結構之實際材料參數，再針對複合型雨刷進行模型驗證，得到等效於實際結構之有限元素模型。另一方面，以系統方塊圖理念，從輸入、幾何、材料、邊界及接觸介面，通過一系列基準案例之研究，確定合理的模擬分析設定進行分析，最後以簡化雨刷模型進行碰撞模擬，分為自由落下、旋轉接觸及刷片底部接觸力之分析，在模擬雨刷碰撞分析技術，後續可套用於各種類雨刷，降低開發成本。
並列摘要
Wipers are one of important components in vehicles for cleaning the raindrop or dust on the windshield to ensure the driver having the clear visual sight. The inspection of wiper quality is one of the critical issues, especially for the impact test in which the wiper may not exceed the defined plastic deformation. This work aims to study the hybrid type of wiper by using computer aided engineering (CAE) technique to simulate the wiper impact so as to predict the possible plastic deformation and stress concentration. The hybrid wiper structure is composed of many components. The material mechanical properties are needed for simulation. This work applies finite element analysis (FEA) and experimental modal analysis (EMA) to perform model verification on each component and calibrate the structural material parameters. The assembly of hybrid wiper structures can also be validated to obtain the equivalent FE model. In addition, based on the system block diagram the system input, geometry, material, boundary and contact interface are systematically analyzed by performing a series of benchmark studies to plan the analysis setup for ensuring reasonable simulation. The simplified wiper structure is constructed to study the impact for both the free fall and rotating contact, respectively, as well as the wiper contact force distribution along the curve base boundary. The established analytical techniques in simulating the wiper impact can be adopted for different types of wipers and cut down the development cost.