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題 名 | 坑道外部爆炸數值模擬=Numerical Simulation of Tunnel Subjected to External Explosion |
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作 者 | 洪正偉 ; 黃國峯; 王耀德; | 書刊名 | 黃埔學報 |
卷 期 | 64 2013.04[民102.04] |
頁 次 | 頁231-239 |
分類號 | 595.81 |
關鍵詞 | 坑道; 外部爆炸; 數值模擬; LS-DYNA; Tunnel; External explosion; Numerical simulation; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以LS-DYNA有限元素軟體建立兩種不同型式之數值模型,探討坑道外部爆炸 於坑道入口處之爆壓,並與爆炸試驗比較。研究結果顯示,在爆炸試驗部分,在相同距 離下,隨炸藥量增加,坑道入口處壓呈現增加趨勢。在數值模擬部分,使用結合流固耦 合與經驗公式方式建模,改善過去僅用流固耦合建模之數值模型運算時間過長之缺點, 可減少數值計算時間。另外在計算精度方面,數值模擬爆壓結果與爆炸試驗比較,在坑 道入口處最大誤差在7%以內,可有效預測爆壓值。 |
英文摘要 | The objective of this study is to simulate the shock wave due to tunnel external explosion by using the LS-DYNA software. Two different methods of simulation were performed. These methods are arbitrary Lagrangian Eulerian (ALE) method, and coupling of Lagrangian and ALE method. The experiment results indicated that the increase with the amount of explosives, the pressure increase at same distance to the tunnel entrance. In numerical simulation part, the coupling of Lagrangian and ALE method can be improved the computation time. A significant computational cost savings can be realized. In addition, the numerical simulation results exhibited well agreement with the experimental results and the overpressure variation was less than 7%. |
本系統中英文摘要資訊取自各篇刊載內容。