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本文用基于试载法的分载位移法进行拱坝动力分析,并讨论拱坝动力分析试载法中柔度矩阵的对称性质及自振特性分析等问题,指出柔度矩阵是不对称的;因而不能直接套用直接滤频法或斯托杜拉(Stodola)法计算自振特性.文中进一步证明了用直接滤频法可以得到准确的固有频率,但须经过转换才能得到准确的振型.计算实例表明,分载位移法的计算结果与有限元法的结果吻合较好.
In this paper, the dynamic analysis of arch dam is carried out based on the loading method of loading method and the problems of the symmetry and flexibility of the flexibility matrix are discussed. It is pointed out that the flexibility matrix is asymmetric. Therefore, the direct filtering method or the Stodola method can not be used directly to calculate the natural vibration characteristics. It is further proved that the accurate natural frequency can be obtained by the direct filtering method, but the accurate vibration mode can be obtained after conversion The example shows that the result of the displacement displacement method is in good agreement with the finite element method.