樑、板結構受撞擊的動態反應分析

The Impact of Dynamics of Beams and Plates

陳世昌(Shi-Chang Chen)

指導教授 ： 洪振發

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.10387

摘要

本文探討了樑和板結構的撞擊破壞問題，文中首先利用塑性鉸概念分析樑結構變形破壞特性，利用非線性有限元素計算程式LS-DYNA模擬樑在側向撞擊荷載作用下塑性鉸的運動性質，得出了和理論評估相符合的結果。其次，針對板的切割破裂、壓擠褶疊以及橫向穿透三種破壞模式進行數值模擬計算分析。最後，對文獻[24]中NSWC船舶碰撞實驗模型進行了碰撞模擬的數值計算，並將計算結果與實驗數據及經驗估算式作比對，得到相近似的結果。論文同時還就三種不同船舶側撞的破壞問題進行了討論，本文可提供作為結構的碰撞分析和船舶防撞保護設計的參考依據。

關鍵字

能量吸收 ； 塑性鉸 ； 塑性變形 ； 船舶碰碰撞

並列摘要

This thesis discussed the failure of plates and beams,subjected to impact load. Firstly,the deformation and failure property of the beam structures is described by Plastic Hinge in this thesis.
Using Nonlinear finite element program LS-DYNA simulate the plastic hinges to dynamic response of the beam under transverse load ,the simulating results were in good accordance with the approximate analytical method to evaluate beams,subjected to impact load. Secondly,Tearing failure ,Crushing,folding or denting failure and Penetration and Stretching failure modes of plates were discussed and simulated in this thesis.
Finary the NSWC experimental ship collision simulation example was carried out and the simulation results fitted well with the results of experiments and the Minorsky’s experience formula.We also discussed three transverse ship collision simulation example extensively, and compared the simulation result with The Minorsky's experience formula. The simulation result is consistent with The Minorsky's experience formula very good. This thesis is helpful for structural collision analysis,also can help the design of ship protection.

並列關鍵字

ship collision ； energy absorbed ； Plastic hinge ； plastic deformation

參考文獻

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