运用LS-DYNA非线性有限元软件，建立了法兰连接结构的三维有限元模型，使用罚函数法实现了法兰盘－螺栓连接－法兰垫的非线性耦合作用，利用温度荷载法实现了螺栓连接结构的预紧力加载，采用ＡＬＥ多物质流－固耦合算法研究了法兰连接结构在爆炸冲击荷载作用下的动力响应特性，分别研究了法兰连接在爆炸冲击荷载作用下冲击波入射角、螺栓连接预紧力、法兰垫厚度对其结构的影响，并考虑了垫片为金属材料（合金钢）以及非金属材料（橡胶）时的情况。结果表明，法兰盘为法兰连接的主要耗能构件。合金钢法兰垫片受冲击波入射角的影响较小，而螺栓连接则主要受冲击波入射角的影响。法兰盘在高压压缩波的作用下会产生相对于螺栓连接的不均匀压缩变形。厚垫片并非比薄垫片好，适当减小法兰垫片厚度，可以提高法兰结构的抗冲击能力。
Abstract
Using the nonlinear finite element software LS-DYNA,a flange connection structure’s 3D finite element model was built. The nonlinear coupling among a flange disk,a bolt connection and a flange gasket was realized using the penalty function method. The pre-tightening force loading of bolt connection was realized using the temperature load method. The ALE multi- matter fluid-solid interaction algorithm was adopted to study the dynamic response characteristics of a flange structure under blast impact loads. The effects of shock wave’s incident angle,bolt connection’s pre-tightening force and flange gasket’s thickness on a flange connection structure’s dynamic features were studied considering flange gasket being alloy steel and rubber under the action of blast impact loads. The results showed that flange disk is the main energy-dissipation component; bolt connection is mainly affected by incident angle of shock wave; effects of shock wave’s incident angle on an alloy steel flange gasket are smaller; under the action of high pressure compression wave,the flange disk produces non-uniform compression deformations relative to bolt connection; a thicker flange gasket is not always better than a thinner one be,reducing properly flange gasket’s thickness can improve the anti-impact capacity of flange connection structures.
关键词
法兰连接 /
爆炸冲击 /
数值模拟 /
动力响应特性
{{custom_keyword}} /
Key words
flange connection /
blast impact /
numerical simulation /
dynamic response characteristics
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1]金 晶，吴新跃.螺栓连接结构的爆炸冲击破坏[J].爆炸与冲击，2010,30(2).
Jin Jing，Wu Xinyue.Explosion impact failure of bolted structure [J]. explosion and shock，2010,30 (2)
[2]Hallquist J O. LS-DYNA Theoretical Manual[M]. California: Livemore Software Technology，1998:716-717.
[3]米双山，刘东升，徐亚卿.基于流固耦合方法的爆炸仿真分析.先进制造与管理(J).2008,27(03).
Mi Shuangshan，Liu Dongsheng，Xu Yaqing. explosive simulation based on fluid solid coupling method. The advanced manufacturing and management (J).2008,27 (03).
[4]王和慧，卢均臣，关凯书等.带接管组合法兰的强度和密封有限元分析[J].压力容器,2012,02.
Wang Hehui，Lu Junchen，Guan Kai Shu.Strength and seal finite element analysis of combined flange with a pipe [J]. pressure vessel, 2012,02.
[5]寇晓枫，王高辉，卢文波等.空气隔层对水下爆炸冲击波的缓冲效应[J].振动与冲击,2017,36(3).
Kou Xiaofeng，Wang Gaohui，Lu Wenbo.Mitigation effects of air interlayer on underwater explosion shock wave[J]. vibration and shock，2017,36 (3).
[6]蒋志刚，白志海，严 波等.钢箱梁桥面板爆炸冲击响应数值模拟研究[J].振动与冲击,2012,31(5).
Jiang Zhigang，Bai Zhihai，Yan Bo.Numerical simulation for response of steel box girder deck to blast loading [J].，2012,31 (5).
[7]Rabczuk T，Samaniego E，Belytschko T. Simplified model for pre-dicting impulsive loads on submerged structures to account for fluid-structure interaction. International Journal of Impact Engineering，2007,34: 163-177.
[8]郭 攀，刘 君，武文华.爆炸冲击载荷作用下流固耦合数值模拟[J].力学学报，2013，45(2).
Guo Pan，Liu Jun，Wu Wenhua.Numerical simulation of fluid solid interaction in explosive shock loading [J]. Chinese Journal of mechanics， 2013,45 (2)
[9]John D.Reid，Nicholas R.Hiser. Detailed modeling of bolted joints with slip－page. Finite elements in Analysis and Design，2005（41）：547～562.
[10]喻健良，闫兴清，罗从仁.高温下法兰系统温度分布及螺栓载荷变化[J].压力容器，2013,30(11).
Yu Jianliang，Yan Gang，Luo Congren.Temperature distribution and bolt load change of flange system under high temperature [J]. pressure vessel，2013,30 (11)
[11]王等旺，李 捷，王 昭等.爆炸容器法兰变形试验研究与数值模拟[J].压力容器，2014,04.
Wang Dengwang，Li Jie，Wang Zhao . Experimental study and numerical simulation of the deformation of explosive vessel flange [J]. pressure vessel，2014,04.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(3046 KB)
