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題 名 | 鋼筋混凝土板承受錐型裝藥貫入數值模擬=Numerical Simulation of Reinforced Concrete Slab Perforation Subjected to Shaped Charge Explosion |
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作 者 | 張瑞麟; 洪正偉; 畢可信; 王耀德; | 書刊名 | 黃埔學報 |
卷 期 | 64 2013.04[民102.04] |
頁 次 | 頁181-191 |
分類號 | 595.81 |
關鍵詞 | 流固耦合; 錐型裝藥; 鋼筋混凝土; Arbitrary lagrangian-eulerian; Shaped charge; Reinforced-concrete; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要在利用LS-DYNA 有限元素分析軟體中之ALE 流固耦合數值模式,探 討鋼筋混凝土板承受錐型裝藥貫入後之坑洞大小,並進行參數研究。鋼筋與混凝土採用 Lagrangian網格,而炸藥、藥型罩與空氣採用Eulerian網格。以截頂錐型裝藥建構Eulerian 描述法數值模型,經錐型裝藥數值模式參數分析後,將射流形成、射流運動的形態等模 擬值與實驗值相比較,射流速度誤差在2%以內,但對杵體速度之誤差則大於30%,驗 證了本研究所用的錐型裝藥射流形成數值模型的可行性。在純混凝土板與鋼筋混凝土板 承受錐型裝藥貫入部分,以元素侵蝕效應中之剪應變及主應變為主要參數,探討混凝土 板承受錐型裝藥貫入後混凝土的破壞現象,研究發現剪應變侵蝕為影響混凝土板破壞之 主要控制因素,由模擬結果可知在失效剪應變值為0.002 時各項破壞平均直徑有收斂的 現象,故失效剪應變建議值為0.002。但與實驗結果相比,數值模擬僅能在最小破壞平 均直徑之誤差達5%,頂面與底面破壞平均直徑之誤差仍過大。 |
英文摘要 | The objective of this research was to simulate the crater size of a reinforced concrete slab subjected to shaped charge , due to the erosion of the front region of the jet having perforated through the target by using the LS-DYNA software. The Arbitrary Lagrangian Eulerian(ALE) algorithm was used to simulate explosive, liner and air in Euler meshes and Lagrangian meshes were used for rebar and concrete. First of all, we built a shaped charge model with Eulerian method of description compared the simulate value of appearance of jet form and exercise with experiment after simulation analysis of shaped-charge jet, the result was compared with Tan’s experimental results. Then, a reinforced concrete slab subjected to a shaped charge were considered for studying the effect of erosion parameters on appearance of concrete destroying after penetrating. Maximum shear strain and principal strain were considered. Numerical Results show that the inaccuracy of jet value was under 2% but over 30% at slug value. It was verified the feasibility of numerical simulation of shaped-charge jet. However, by using an erosion value of 0.002 for maximum shear strain and compared to experiment, the error of the minimum average destructive diameter is 5%. The errors of the top and bottom side for average destructive diameter are still large. |
本系統中英文摘要資訊取自各篇刊載內容。