噪声作用下加筋板的几何非线性随机响应（英文）
发布时间：2021-06-17 11:10
提出了一种降阶模型、等效线性化和有限元相结合的方法,对噪声荷载作用下加筋板的几何非线性随机振动进行分析。基于大挠度有限元公式,得到加筋板的非线性运动方程。为了减少计算量,建立了结构的降阶模型,然后通过DMAP语言编程将等效线性化技术集成到NASTRAN有限元软件中。针对加筋板建立了梁-板组合的有限元模型,梁单元与壳单元共用节点,并确定梁的偏置和截面属性。本方法可以分别获得梁、板单元的应力响应均方根值,并可得到加筋板有/无加筋面各自的应力分布。最后对比分析了分别由线性和等效线性化方法得出的统计动态响应结果。结果表明,该方法可用于分析加筋板的几何非线性随机响应。几何非线性因素在加筋板随机振动响应预测中起着重要的作用,尤其是在强噪声载荷下。
【文章来源】：Transactions of Nanjing University of Aeronautics and Astronautics. 2020,37(05)EICSCD
【文章页数】：13 页
【文章目录】：
0 Introduction
1 Reduced Order Model of Geo-metrically Nonlinear Structures
2 ForceErrorMinimizationof Equivalent Linearization Method for Random Loading
2.1 Theoretical foundation
2.2 Iterative solution for modal equivalent lin-ear stiffness matrix
2.3 Implementation of equivalent linearization solution
3 Numerical Example
3.1 Finite element model of stiffened plate and nonlinear stiffness coefficient
3.2 Result and analysis
4 Conclusions
本文编号：3235084
【文章来源】：Transactions of Nanjing University of Aeronautics and Astronautics. 2020,37(05)EICSCD
【文章页数】：13 页
【文章目录】：
0 Introduction
1 Reduced Order Model of Geo-metrically Nonlinear Structures
2 ForceErrorMinimizationof Equivalent Linearization Method for Random Loading
2.1 Theoretical foundation
2.2 Iterative solution for modal equivalent lin-ear stiffness matrix
2.3 Implementation of equivalent linearization solution
3 Numerical Example
3.1 Finite element model of stiffened plate and nonlinear stiffness coefficient
3.2 Result and analysis
4 Conclusions
本文编号：3235084
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