用部件模态综合法计算冷却塔整体结构的动力响应
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摘要
冷却塔整体结构由旋转壳塔简和循环对称的支柱梁系组成。本文将它们作为两个子结构,用双协调模态综合法计算塔整体的固有振动、动力响应,并着重进行了地震应力分析,既相当精确地反应了壳体底局部应力和支柱梁系中的应力,又保持了单独分析两个子结构时精度高、计算量小的特点。理论分析和计算程序已被应用于冷却塔的设计。
In this paper,the natural vibration and seismic response of a cooling tower in which an axisymmetricshell attached a cireulent symmetric beam system are thested by using component mode synthesis.Theshell and beam systems are considered as two sub-structures so that not only the local stress distributionnear the shell bottom can be calculated but the higher precision and less computation work can also bemaintained.The theoretical analysis and computer program have already used in practical design for coolingtower.
引文
1 北京大学固体力学教研室.旋转壳的应力分析.北京:水利电力出版社,1979年
    2 Gladwell G M L.Branch mode analysis of vibrating systems.Journal of Sound and Vibration,January 1964;1:41-59
    3 武际可,邵秀民.循环矩阵及其在结构计算中的应用.计算数学,1979;2:144-153
    4 王大钧,任钧国,陈平.用模态综合法计算旋转壳的振动.固体力学学报,1981;3:343-351
    5 王文亮,杜作润,陈康元.模态综合技术短评和一种新的改进.航空学报,1979;3:32-51

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