给出了液-固耦合系统振动方程;以有限元软件ANSYS为数值模拟工具,对由水箱和内部液体构成的液-固耦合系统进行有限元分析,计算了空箱及满载时的固有频率,绘制出振型图,并给出了系统固有频率随液体含量的变化关系;同时对水箱空箱及满载进行振动测试,获得前几阶共振频率,并与数值计算结果进行对比吻合较好,结果表明液—固耦合数值仿真方法是有效的.%The fluid-solid coupling vibration equation of the system was provided. Based on ANSYS software, the liquid -solid coupling finite element analysis was conducted about the coupling system composed of the water tank and the liquid inside it and the natural frequencies and the mode shapes were calculated. In addition the relationship between the natural frequency and the liquid content was given. The first several natural frequencies were obtained through the vibration test on the tank and results were compared with that acquired by the numerical calculation. The results are in good agreement and it show that the fluid-solid coupling numerical simulation method is effective.
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