本文關(guān)鍵詞：直柱型點(diǎn)陣結(jié)構(gòu)在填充聚氨酯材料時(shí)的力學(xué)（抗爆）性能研究　出處：《江蘇科技大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 復(fù)合材料 點(diǎn)陣結(jié)構(gòu) 力學(xué)性能 爆炸 吸能

【摘要】：近幾年來(lái),隨著材料制備以及機(jī)械加工技術(shù)的迅猛發(fā)展,復(fù)合材料點(diǎn)陣結(jié)構(gòu)受到許多領(lǐng)域的廣泛關(guān)注,尤其是國(guó)內(nèi)外航空、航天飛行器和海軍艦船等運(yùn)載設(shè)備領(lǐng)域,復(fù)合材料點(diǎn)陣結(jié)構(gòu)儼然已成為極具潛力的先進(jìn)輕質(zhì)高強(qiáng)多功能材料。因此,對(duì)于新型復(fù)合材料點(diǎn)陣結(jié)構(gòu)的設(shè)計(jì)研究具有重要的工程意義。本文以直柱型點(diǎn)陣結(jié)構(gòu)在填充聚氨酯材料時(shí)的結(jié)構(gòu)形式作為研究對(duì)象,利用ANSYS/LS-DYNA有限元軟件,模擬該復(fù)合材料點(diǎn)陣結(jié)構(gòu)在空中爆炸載荷下的響應(yīng),分析其在各項(xiàng)參數(shù)改變的情況下,響應(yīng)隨之發(fā)生的改變,并從吸能的角度出發(fā),比較該復(fù)材料點(diǎn)陣結(jié)構(gòu)與其他形式的結(jié)構(gòu)抗爆性能上的優(yōu)劣,綜合討論得出該復(fù)合材料點(diǎn)陣結(jié)構(gòu)具有優(yōu)良的力學(xué)性能。本文主要研究工作及結(jié)論如下:(1)利用有限元軟件ANSYS/LS-DYNA模擬空中爆炸,并將計(jì)算得到的峰值超壓與經(jīng)驗(yàn)公式進(jìn)行比較,研究發(fā)現(xiàn),網(wǎng)格密度對(duì)峰值超壓的計(jì)算結(jié)果有一定的影響,具體規(guī)律是網(wǎng)格單元尺寸越小,計(jì)算結(jié)果與經(jīng)驗(yàn)公式越接近。(2)介紹了流體—結(jié)構(gòu)耦合算法,并以實(shí)體板在空中爆炸的響應(yīng)作為算例,觀察其吸能及變形情況。(3)本文在第四章中詳細(xì)介紹了夾芯層高度、面板厚度改變時(shí),直柱型點(diǎn)陣結(jié)構(gòu)填充聚氨酯材料的結(jié)構(gòu)形式在空中爆炸載荷下的響應(yīng),主要觀察了其吸能和變形的計(jì)算結(jié)果,并發(fā)現(xiàn)隨著結(jié)構(gòu)質(zhì)量的增加,變形和吸能都隨之減小。(4)從吸能的角度比較了復(fù)合材料點(diǎn)陣結(jié)構(gòu)與聚氨酯夾層板結(jié)構(gòu)、實(shí)體板結(jié)構(gòu)性能的優(yōu)劣,并得出相同工況下復(fù)合材料點(diǎn)陣結(jié)構(gòu)的抗爆性能相較于其他兩者更為優(yōu)秀的結(jié)論。(5)最后利用ANSYS有限元軟件模擬結(jié)構(gòu)在靜態(tài)加載情況的響應(yīng),并綜合比較了復(fù)合材料點(diǎn)陣結(jié)構(gòu)、聚氨酯夾層板結(jié)構(gòu)、實(shí)體板等結(jié)構(gòu)的變形情況,得出復(fù)合材料點(diǎn)陣結(jié)構(gòu)具有良好的剛度性能的結(jié)論。
[Abstract]:In recent years, with the rapid development of material preparation and machining technology, the lattice structure of composite materials has received extensive attention in many fields, especially in aviation at home and abroad. In the field of spaceflight vehicle and naval vessel, composite lattice structure has become an advanced lightweight and high-strength multifunctional material with great potential. It has important engineering significance for the design and research of new composite lattice structure. In this paper, the structure form of straight column lattice structure filled with polyurethane material is taken as the research object. ANSYS/LS-DYNA finite element software is used to simulate the response of the composite lattice structure under the explosion load in the air, and the response of the composite lattice structure is analyzed when the parameters change. And from the point of view of energy absorption, the advantages and disadvantages of the composite lattice structure and other forms of anti-explosion performance are compared. It is concluded that the composite lattice structure has excellent mechanical properties. The main work and conclusions of this paper are as follows: (1) the finite element software ANSYS/LS-DYNA is used to simulate the aerial explosion. By comparing the calculated peak overpressure with the empirical formula, it is found that the grid density has a certain influence on the calculation results of the peak overpressure, and the specific rule is that the smaller the size of the grid cell is. The fluid-structure coupling algorithm is introduced, and the response of solid plate in air explosion is taken as an example. In Chapter 4th, the height of the sandwich layer and the thickness of the panel are introduced in detail. The response of polyurethane filled with straight column lattice structure under the explosion load in the air was studied. The results of energy absorption and deformation were observed, and it was found that the structure quality increased with the increase of the structure mass. Deformation and energy absorption are reduced. 4) from the point of view of energy absorption, the advantages and disadvantages of composite lattice structure, polyurethane sandwich plate structure and solid plate structure are compared. The conclusion that the anti-explosion performance of the composite lattice structure is better than the other two under the same working condition is obtained. Finally, the response of the structure under static loading is simulated by ANSYS finite element software. The deformation of composite lattice structure, polyurethane sandwich plate structure and solid plate structure are compared, and the conclusion that the composite lattice structure has good stiffness performance is obtained.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB33

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 白瑞祥;初嘉鵬;王蔓;陳浩然;;含損傷復(fù)合材料AGS結(jié)構(gòu)固有頻率數(shù)值預(yù)測(cè)[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年12期

2 章繼峰;張博明;杜善義;;平板型復(fù)合材料格柵結(jié)構(gòu)的增強(qiáng)改進(jìn)與參數(shù)設(shè)計(jì)[J];復(fù)合材料學(xué)報(bào);2006年03期

3 張志峰;陳浩然;白瑞祥;;一種分析AGS結(jié)構(gòu)的三角形加筋板殼單元[J];工程力學(xué);2006年S1期

4 張志峰;陳浩然;白瑞祥;;含初始缺陷復(fù)合材料格柵加筋圓柱殼的魯棒優(yōu)化設(shè)計(jì)[J];固體力學(xué)學(xué)報(bào);2006年01期

5 吳迪;張世聯(lián);;空中爆炸下艦船動(dòng)態(tài)響應(yīng)數(shù)值模擬[J];艦船科學(xué)技術(shù);2007年06期

6 吳林志;熊健;馬力;王兵;張國(guó)旗;楊金水;;新型復(fù)合材料點(diǎn)陣結(jié)構(gòu)的研究進(jìn)展[J];力學(xué)進(jìn)展;2012年01期

7 易玉華;石朝鋒;;聚氨酯夾層結(jié)構(gòu)板的性能與制造方法[J];造船技術(shù);2007年06期

相關(guān)碩士學(xué)位論文 前2條

1 趙望安;復(fù)合材料點(diǎn)陣夾芯結(jié)構(gòu)熱載荷下的熱力性能分析與優(yōu)化[D];哈爾濱工業(yè)大學(xué);2010年

2 胡文波;輕質(zhì)點(diǎn)陣結(jié)構(gòu)多尺度并發(fā)優(yōu)化設(shè)計(jì)研究[D];大連理工大學(xué);2013年

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