本文關鍵詞： 圓柱殼 泡沫鋁 泡沫鋁填充殼 彈體 侵徹　出處：《中北大學》2015年碩士論文　論文類型：學位論文

【摘要】：近年來，高g值碰撞現(xiàn)象已經成為航空、軌道交通、武器裝備等領域的重要研究課題。彈載加速度測試裝置正是在高g值環(huán)境中工作，，其內部的記錄電路是重要的核心元件，需要緩沖保護。本文將研究圓柱殼、泡沫鋁、泡沫鋁填充殼三種結構在高g值沖擊條件下對輕質物體（記錄電路）的緩沖保護機理。首先，對圓柱殼、泡沫鋁受沖擊時的吸能理論進行了分析，然后建立了簡化的彈載加速度測試裝置有限元模型，利用有限元軟件ANSYS/LS-DYNA進行緩沖元件的緩沖吸能仿真，分別考慮了圓柱殼壁厚、泡沫鋁密度及初始沖擊加速度的脈寬和幅值等變量對其緩沖效果的影響，同時對圓柱殼受軸向沖擊的屈曲模態(tài)進行了簡要分析。仿真結果表明：在本實驗條件下，殼壁厚越小，緩沖效果越好；泡沫鋁密度越小，緩沖效果越好；泡沫鋁填充殼中殼壁厚越小、泡沫鋁密度越小，其緩沖效果越好；相同緩沖元件在不同加速度下，加速度的脈寬和幅值對其緩沖效果也有一定的影響。最后對彈體侵徹鋼板和混凝土的過程進行了模擬仿真，采用前面仿真得出的緩沖效果最好的圓柱殼、泡沫鋁、泡沫鋁填充殼作為彈載加速度測試裝置中的緩沖元件，對彈體侵徹相同靶板過程中三種緩沖元件的緩沖效果進行了分析比較，結果表明:彈體侵徹過程中，在其他條件相同的情況下，泡沫鋁填充殼這種組合結構的緩沖效果要優(yōu)于單泡沫鋁及單殼的緩沖效果。
[Abstract]:In recent years, the high g value collision phenomenon has become the aviation, rail transportation, an important research topic in the field of weapon. The missile acceleration testing device is in the high g value environment, its internal recording circuit is the core of the main components need to buffer protection. This paper will research the cylindrical shell, aluminum foam. Three kinds of aluminum foam filled shell structure in high G impact on the condition of light objects (recording circuit) buffer protection mechanism. Firstly, the cylindrical shell, aluminum foam under impact energy absorption theory is analyzed, then a simplified missile acceleration testing device finite element model, using finite element buffer the energy absorption element software ANSYS/LS-DYNA simulation, considering cylindrical shell wall thickness, the impact acceleration of aluminum foam density and the initial pulse width and amplitude variable on the cushioning effect, at the same time on the cylindrical shell under axial impact bending Buckling mode was analyzed. The simulation results show that under the experimental conditions, the shell thickness is smaller, the buffering effect is better; the smaller the density of aluminum foam, cushioning effect; aluminum foam filled shell shell wall thickness is smaller, the smaller the density of aluminum foam, the buffering effect is better; the same element in different buffer acceleration, pulse width and amplitude of acceleration has some influence on the buffering effect. At the end of the penetration of steel and concrete process simulation, using the cylindrical shell, the buffering effect of front obtained the best aluminum foam, cushioning element as the missile acceleration testing device shell filled with aluminum foam in the. The penetration effect of three kinds of buffer buffer components of the same target plate are analyzed and compared, the results show that the penetration process, under the same condition, this kind of composite structure shell filled with aluminum foam The buffer effect is better than that of single foam aluminum and single shell.

【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB383.4;TQ133.1

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本文編號：1445973