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題名 | 多體接觸分析之加權節點選配法=Multibody Contact Analysis by the Weighted Nodal Fitting Method |
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作者 | 王仲宇; 盛若磐; 陳銘鴻; | 書刊名 | 力學 |
卷期 | 16:2 2000.12[民89.12] |
頁次 | 頁81-92 |
分類號 | 440.13 |
關鍵詞 | 加權節點選配法; 有限元素法; 動態接觸; Weighted nodal fitting; Multibody system; Finite element; Dynamic contact; |
語文 | 中文(Chinese) |
中文摘要 | 本論文提出一新的可處理多體系統動態接觸行為的數值模擬方法。各可變形塊體 的位移場近似函數,則使用較傳統有限元素法更廣義之加權節點選配法進行描述,並推導相 關之控制方程。加權節點選配法取消節點與元素間之關聯性,使得其數值分析的前後期處理 作業更為簡便。平滑且連續之位移場與應力場可較傳統有限元素法更易於分析具有局部應力 集中效應的力學問題。文中將深入探討此一新數值方法中加權函數的特性與節點選取之原則 ,並與傳統有限元素法作詳細之比較討論。在納入慣性效應與接觸機制後,可將此法應用於 可變形多體接觸問題的分析。文中並以數值範例說明此一新的數值分析法的功能及優越性。 |
英文摘要 | In this paper, a new numerical method which is capable to simulate the dynamic contact behaviors of deformable multibody systems is presented. The displacement field within each deformable body is approximated by a so called "weighted nodal fitting method" (WNFM). This WNF method has a more general mathematical background than the conventional finite element method. The release of connectivity requirements among nodal points and elements makes this WNF method have a more flexible numerical data structure in its pre- and post-processing schemes. Properties of the weighting function and schemes of nodal points selection are discussed in detail. Continuous and smooth displacement and stress fields can be constructed to study problems with local stress concentration effect or high stress distribution gradient. By considering the inertia effect and contact mechanisms, this newly proposed numerical method is able to analyze the dynamic contact behaviors of systems containing deformable bodies. The accuracy and efficiency of this new method are demonstrated by some numerical examples. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。