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中文核心期刊

大型结构大修改下的静力重分析方法

Static reanalysis methods for large-scale structrues with large modifications

  • 摘要: 对于大型结构发生参数大修改时, 采用组合近似算法进行结构位移重分析会使所得的近似解与真实解误差较大. 为了解决组合近似算法在大型结构发生参数大修改时的求解精度不足缺陷, 提出了3种改进的结构静力重分析方法. 该3种改进算法都是基于组合近似算法, 并分别通过位移迭代修正、刚度逐步逼近等措施使求解精度不断提高. 通过2个算例验证了3种改进算法的有效性和高效性, 并对3种改进算法之间的求解效率进行了比较.

     

    Abstract: This study presents three static reanalysis methods forlarge-scale structures with large modifications of structural parametersbased on the Combined Approximation (CA) method. For large-scale structureswith large changes in the design, the Combined Approximation method can notprovide enough accurate results. To improve the accuracy of the results inreanalysis of the modified structure, three CA-based static reanalysismethods are presented by introducing several strategies, such asdisplacement iterative correction and stiffness progressive approximation.Two numerical examples are presented to demonstrate the validity and theimprovement of the proposed methods, and the results show that the methodsgiven can provide accurate approximations and can significantly reduce thecomputational effort involved in reanalysis of large-scale structures withlarge modifications. Comparisons of the computational costs of these threepresented methods are made.

     

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