| 基于不同土体的牵引火炮动态应力分析 |
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| 引用本文： | 刘达,顾克秋,何永.基于不同土体的牵引火炮动态应力分析[J].南京理工大学学报(自然科学版),2008,32(6). |
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| 作者姓名： | 刘达 顾克秋 何永 |
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| 作者单位： | 南京理工大学,机械工程学院,江苏,南京,210094 |
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| 基金项目： | 国防基础预研基金
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| 摘 要： | 应用结构动力学有限元法研究轻型牵引火炮发射时支撑土体的特性对炮架部件动态应力的影响.首先研究了某轻型牵引火炮发射时全炮复杂结构系统的动态非线性有限元建模,重点研究了火炮各部件之间的连接关系建模和火炮结构与土体相互作用的集中参数力学模型.然后利用所建立的系统动态有限元模型进行隐式时间积分求解,获得了该牵引火炮置于不同特性土体发射时主要部件的动态应力响应.通过对模拟结果的比较和分析,揭示了牵引火炮发射时炮架动态应力响应峰值与支撑土体刚度之间存在与直观认识不一致的关系,即火炮置于较软土体上发射时架体动态应力峰值高于火炮置于刚硬基础上发射时的应力峰值.
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| 关 键 词： | 轻型牵引火炮 非线性结构动力学 复杂结构 有限元法 大位移滑动接触 隐式时间积分 土动力学模型 动态应力 |
Dynamic Stress Analysis of Towed Howitzer Placed on Different Soils |
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| LIU Da,GU Ke-qiu,HE Yong.Dynamic Stress Analysis of Towed Howitzer Placed on Different Soils[J].Journal of Nanjing University of Science and Technology(Nature Science),2008,32(6). |
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| Authors: | LIU Da GU Ke-qiu HE Yong |
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| Institution: | School of Mechanical Engineering;NUST;Nanjing 210094;China |
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| Abstract: | Influence of supporting soil's characteristics upon dynamic stress of the carriage components of light-weight towed howitzers during firing is studied through structural dynamics finite element method.Nonlinear finite element modeling of structural dynamics for the whole complex structure system of a light-weight towed howitzer during firing is investigated;emphasis is placed on the modeling of connections of different howitzer components and the mechanics model with lumped parameter of interaction between ... |
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| Keywords: | light-weight towed howitzers nonlinear structural dynamics complex structures finite element method large slide contact implicit time integration soil dynamics model dynamic stress |
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