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題 名 | Comparison of Time Domain BEM for 2D Elastodynamic=時域邊界元素法在二維應力波傳之比較 |
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作 者 | 王忠成; 劉俊秀; | 書刊名 | 中國工程學刊 |
卷 期 | 21:4 1998.07[民87.07] |
頁 次 | 頁479-484 |
分類號 | 440.13 |
關鍵詞 | 時間域; 邊界元素法; 應力波傳; Time domain; BEM; Elastodynamic; |
語 文 | 英文(English) |
中文摘要 | 本文主要以兩個例題:一圓柱體狀空洞承受爆炸內壓力與一短柱承受斜階 段負荷,來說明作者推導之LC、QC與QL時域邊界元素法在與理論解析、 Laplace域邊界元素法及其他時域邊界方法作比較,顯示此等方法比其餘數值 方法具有優越精確度與數值穩定度。此外,比較LC、QC與QL三者所需計 算時間與time steps 關係,結果顯示LC與QC方法所需計算時間相差很少。 |
英文摘要 | The three (LC, QC and QL)new time domain BEM methods are compared with each other and with an analytical method, the Laplace domain BEM method and another time domain boundary element method by solving two example problems of a circular cylindrical cavity subjected to a suddenly applied internal pressure, and a finite bar subjected to a ramp-step loading. Numerical study reveals that the three(LC,QC and QL)new methods are more accurate and stable than the other numerical methods sued for comparison. Demonstration of the numerical computational time versus time steps of the three BEM methods is also given for a simple two-dimensional elastodynamics problem of a bar with 12-quadratic-element mesh due to an end traction. The difference in computational times by QC and LC methods is small. |
本系統中英文摘要資訊取自各篇刊載內容。