本文關(guān)鍵詞： 兵器科學(xué)與技術(shù) 數(shù)值模擬 三維打印 軍用頭盔內(nèi)膽 拓撲優(yōu)化 蜂窩吸能結(jié)構(gòu)　出處：《兵工學(xué)報》2017年09期 　論文類型：期刊論文

【摘要】：針對目前軍用頭盔的輕量化設(shè)計問題,提出基于拓撲優(yōu)化技術(shù)的軍用頭盔內(nèi)膽輕量化設(shè)計方法。利用三維(3D)打印在成型復(fù)雜異形結(jié)構(gòu)時的優(yōu)勢,建立具有計算機建模、數(shù)值模擬、3D打印以及工程驗證的軍用頭盔內(nèi)膽結(jié)構(gòu)輕量化設(shè)計流程。根據(jù)有限元分析法,提出一種基于結(jié)構(gòu)勢能最小的拓撲優(yōu)化算法。設(shè)計流程主要包括:通過計算機輔助設(shè)計軟件對設(shè)計對象進行3D建模;使用計算機輔助分析軟件Hyper Works中的Hyper Mesh建立有限元模型;通過Hyper Works中的Opti Struct進行拓撲優(yōu)化設(shè)計,查看拓撲優(yōu)化模型的位移結(jié)果,確定設(shè)計結(jié)構(gòu)是否滿足約束條件。為滿足頭盔所必須具有的吸能防撞功能需求,在拓撲優(yōu)化后的頭盔內(nèi)膽基礎(chǔ)上,在其側(cè)面加載蜂窩式吸能結(jié)構(gòu)。使用結(jié)構(gòu)優(yōu)化設(shè)計軟件solid Thinking Inspire對帶有蜂窩式結(jié)構(gòu)的頭盔內(nèi)膽結(jié)構(gòu)進行數(shù)值分析驗證,模擬真實的頭盔佩戴工況,優(yōu)化前后的von Mises最大等效應(yīng)力近似一致。對實驗?zāi)Ｐ瓦M行工程受力驗證,對比優(yōu)化前后軍用頭盔內(nèi)膽的承受載荷能力。實驗結(jié)果表明:在滿足一定的約束條件和功能需求的情況下,拓撲優(yōu)化結(jié)構(gòu)可達到輕量化設(shè)計的目的,減重效果可達到17.14%,最大承受力達到原始結(jié)構(gòu)的93.72%;同時3D打印技術(shù)結(jié)合數(shù)值模擬可以縮短研發(fā)周期,提高制造效率。
[Abstract]:Aiming at the problem of lightweight design of military helmets at present, a lightweight design method for military helmets is proposed based on topology optimization technology. The advantages of 3D printing in shaping complex irregular structures are used to establish computer modeling. Numerical simulation, 3D printing and engineering verification of lightweight design flow for military helmet inner gallbladder structures. Based on finite element analysis, A topology optimization algorithm based on minimum potential energy of structure is proposed. The design process includes: 3D modeling of design object by computer aided design software, building finite element model by Hyper Mesh in computer aided analysis software Hyper Works. Through the Opti Struct in Hyper Works, the topology optimization design is carried out, and the displacement results of the topology optimization model are checked to determine whether the design structure meets the constraint conditions. In order to meet the requirements of the energy absorption and collision prevention function required for the helmet, On the basis of topology optimization, the honeycomb energy absorption structure is loaded on the side of the helmet, and the structural optimization software solid Thinking Inspire is used to verify the structure of the helmet with honeycomb structure. The maximum equivalent stress of von Mises before and after optimization is approximately the same. The experimental model is verified by engineering force. The experimental results show that the topology optimization structure can achieve the purpose of lightweight design under certain constraints and functional requirements. The weight loss effect can reach 17.14 and the maximum bearing capacity can reach 93.72 of the original structure. At the same time 3D printing technology combined with numerical simulation can shorten the research and development cycle and improve manufacturing efficiency.
【作者單位】： 北京工業(yè)大學(xué)激光工程研究院;北京市數(shù)字化醫(yī)療3D打印工程技術(shù)中心;
【基金】：北京市自然科學(xué)基金項目(Z140002) 北京市科技創(chuàng)新項目(Z141100002814001)
【分類號】：TJ5;TP391.73;TS941.733

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