| 基于模糊因子法的模糊桁架结构动力特性分析 |
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| 引用本文： | 马娟,陈建军,高伟,黄平.基于模糊因子法的模糊桁架结构动力特性分析[J].振动与冲击,2005,24(3):82-84,i008. |
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| 作者姓名： | 马娟 陈建军 高伟 黄平 |
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| 作者单位： | 西安电子科技大学电子机械系,西安,710071 |
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| 基金项目： | 陕西省自然科学基金项目(D7010418)资助 |
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| 摘 要： | 研究了模糊桁架结构动力特性的分析方法,在结构的物理和几何参数同时为模糊变量的情况下,利用模糊因子建立了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,利用区间运算法则推导出结构模糊特征值的表达式。通过算例考察了结构各参数的模糊性对其动力特性模糊性的影响,并获得了一些有意义的结论。该法对模糊结构进行一次动力分析便可求得动力特性,且可充分地反映任一模糊参数对结构模糊动力特性的影响。
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| 关 键 词： | 模糊桁架结构 模糊因子法 模糊变量 区间运算 |
Dynamic Characteristic Analysis of Fuzzy Truss Structure Based on Fuzzy Factor Method |
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| Ma Juan Chen Jianjun Gao Wei.Dynamic Characteristic Analysis of Fuzzy Truss Structure Based on Fuzzy Factor Method[J].Journal of Vibration and Shock,2005,24(3):82-84,i008. |
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| Authors: | Ma Juan Chen Jianjun Gao Wei |
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| Abstract: | A research on analytical method of structural dynamic characteristics aimed at fuzzy truss structure is given. Under the condition that the structural parameters are fuzzy variables simultaneously, the structural stiffness matrix and mass matrix are constructed by using fuzzy factor method. From the Rayleigh expression of structural vibration,the computation expressions of fuzzy variables of structural eigen values are obtained on the basis of principle of interval arithmetic. The influences of structural parameters of fuzzy truss on dynamic characteristics are inspected via engineering examples and some significant conclusions are obtained. |
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| Keywords: | fuzzy truss structure fuzzy factor method fuzzy variable interval arithmetic |
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