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本文在计算水动阻尼力的公式中,考虑各方向运动分量之间的耦合,采用速度向量模的概念,在此基础上推导出线性化等效流体阻尼矩阵的积分表达式.本文给出平面结构情况下单元体(杆件)取不同方向时等效流体阻尼系数的数值结果.分析和算例的数值结果都表明,等效流体阻尼系数与结构杆件在空间中的方位有关,与各方向运动分量之间的耦合有关.本文给出的公式能正确地反映这些现象.
In the formula for calculating the dynamic damping force of water, considering the coupling between the motion components in each direction, the concept of velocity vector mode is adopted. Based on this, the integral expression of the linearized equivalent fluid damping matrix is deduced. The numerical results of the equivalent fluid damping coefficient when the unit body (rod member) takes different directions in the structural condition. The numerical results of the analysis and the examples all indicate that the equivalent fluid damping coefficient is related to the orientation of the structural member in the space, and each The coupling between directional motion components is related. The formula given in this paper can correctly reflect these phenomena.