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随机参数板梁组合结构的动力特性分析 被引量:1

Dynamic Characteristics Analysis for Plate-Beam Composite Structures with Random Parameters
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摘要 以随机物理参数板梁组合结构为对象,研究了基于概率的结构动力特性分析方法。利用随机因子法,建立了考虑结构弹性模量和质量密度同时具有随机性时结构的刚度矩阵和质量矩阵;从结构振动的瑞利商表达式出发,利用代数综合法推导出结构特征值随机变量数字特征的计算表达式。通过算例,分析了结构物理参数随机性对结构动力特性的影响,并表明文中模型和方法的合理性与可行性。 The problem of dynamic analysis based on reliability for the plate-beam composite structures with random parameters is studied in this paper. Considering the randomness of both elastic module and mass density of the structures, the element′s structural stiff and mass matrix have been built, the structure dynamic characteristics is analyzed based on probability, and the digit characteristics of natural frequency random variable is derived from the Rayleigh′s quotient. Finally, an example is given, and some conclusions are obtained.
出处 《机械科学与技术》 CSCD 北大核心 2005年第3期286-289,322,共5页 Mechanical Science and Technology for Aerospace Engineering
基金 国防科技预研项目(20.2.12) 陕西省自然科学基金项目(D7010418)资助
关键词 板梁组合结构 随机物理参数 随机因子法 动力特性分析 Plate-beam composite structures Random physical parameters Random factor method Dynamic characteristics analysis
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参考文献7

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