hypermesh短型金属复合筒对混凝土的高速侵彻效果
关键词 proe hypermesh ansys/ls-dyna 高速侵彻 金属复合筒 混凝土 数值模拟
毕业论文设计论文外文摘要
Title The result of short high-speed matal composite cylinder penetrating concrete
Abstract
It involves a complex series of mechanical problems such as large deformation ,fracture and thermal deformation when short high-speed metal composite cylinder penetrates concrete.To simulate such penetrating questionas by finite element ,not only can greatly reduce test costs and design cycle ,but also can analyze changes of stress and deformation during the penetrating process,as well as analyze the entire progress of opening pit.In this paper ,we utilize proe to establish the geometric medel,then
use hypermesh to get the discrete model,then we got the dynamic model by using LS-DYNA，finally we simulated the process of penetration at different impact angle and different attack angle.By comparing the results we can
can draw the following conclusions:when projetile penetrates concrete at the same impact angle ,the greater the angle of attack, the greater the the crater size;when projetile penetrates concrete at the same attack angle but different attack angle,the projetile throughout the target at different times ;by analysing the crater size and the deformation of the target ,we can establish the concrete target by 2 or 3 times the size of projetile.
Keywords proe hypermesh ansys/ls-dyna high-speed penetration metal composite cylinder concrete simulation
目 次
1 引言 1
1.1 研究背景及意义 1
1.2 国内外研究现状以及发展趋势 1
1.3 侵彻问题的研究方法 3
1.4 本文拟采用的研究方法及步骤 4
2 建立几何模型 6
2.1 Pro/E简介 6
2.2 Pro/E建立几何模型 6
3 建立离散模型 10
3.1 Hypermesh简介 10
3.2 HyperMesh划分网格步骤 10
4 利用LS-DYNA进行数值模拟 12
4.1 引言 12
4.2 LS-DYNA简介 12
4.3 材料模型的选用 12
4.4 材料参数的确定 13
4.5 ansys建立力学模型步骤 15
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