- 學位論文
嬰兒汽車安全座椅結構動態衝擊之研究
A Study on the Dynamic Impact of the Structure of Infant Car Safety Seats
摘要
本文主要目的是為了降低研發成本，針對減少嬰兒安全座椅實際撞擊實驗次數，降低廠商修模所耗費的時間金錢。本研究使用軟體分別為CAE分析軟體LS-DYNA與前處理軟體HyperMesh,分析前撞時後向式安全座椅底座結構動態衝擊受力情形，安全座椅底座是由3D繪圖軟體pro/e建立模型，再由前處理軟體Hypermesh，進行有限元素模型建構及幾何修整、材料性質設定、碰撞接觸模式的選擇、加速度設定、沙漏控制設定與輸出條件控制等，然後藉由LS-DYNA顯性求解器求解，分析其底座的結構強度，探討此產品的設計問題點，並提供安全座椅的設計參考點，以期能降低開發成本，減少開發時間。由本撞擊測試模擬可知，撞擊模擬與實驗相近，且安全座椅底座經改善後，嬰兒安全座椅底座主要受力處之應力能有效的分散，並可通過ARTC的實車前撞擊實驗。
並列摘要
The main purpose of this research is the reduction of infant safety seat for the actual impact experiment times to reduce the redesigning time and cost. The softwares used in this study are CAE software LS-DYNA and pre-processing software HyperMesh. These softwares are used to analyze the impact of dynamics of rear-facing infant safety seat base. In this research the structural impact strength on pre-collision experiment was also performed. Safety seat base is a 3D graphics software pro/e model, and then by pre-processing software Hypermesh, finite element model for the geometric construction and finishing, material properties set, the choice of contact mode, acceleration settings, hourglass control settings and output control conditions, and then solved by LS-DYNA explicit.By analyzing the structural strength of its base to explore the design of this product, this paper also provided a safe reference point for the design of the seat base with a view to saving the R&D cost and time. From the impact analysis and simulation of this research, the numerical results agree well with the experiment results. By improve its base, the mainly affected by the stress of department can effectively dispersed and can pass the ARTC actual impact experiment.