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对一个包含固定结合面的具体结构 ,利用有限元分析程序计算了结合面刚度参数和结合面位置对结构模态的影响。结果表明 ,描述结合面切向刚度大小的参数对结构的扭振刚度模态的影响比对纵向振动模态和弯曲模态的影响显著 ;结合面法向刚度大小的参数对纵向振动模态的影响比对弯曲、扭振模态的影响显著 ;接合面的位置对结构的固有频率也有较为明显的影响。
For a concrete structure with a fixed joint, the influence of the joint stiffness parameters and the joint position on the structure modal was calculated by the finite element analysis program. The results show that the parameters that describe the tangential stiffness of the interface have significant influence on the torsional stiffness modal of the structure than those of the longitudinal vibration mode and the bending mode. The effect of the influence ratio on the bending and torsional vibration modes is significant. The position of the joint surface also has obvious influence on the natural frequency of the structure.