等效网面法在模拟网的水动力特性中的应用

Application of an equivalent method to model dynamic properties of fish net

采用有限单元法建立了网状柔弹性结构的等效网面动力模型。通过把一系列杆相互无摩擦铰接在一起,建立起网结构。采用Morison公式计算作用在杆上的水动力。利用网目合并的方法来减少总的自由度数目。为了验证模型的正确性,数值模拟的结果同前人的试验结果进行了比较,效果良好。

The finite element method is proposed to solve the hydrodynamic response of net panels exposed to currents and waves. The net is modeled by a set of truss elements connected with each other without friction, and the hydrodynamic forces are calculated using Morison equation. Mesh grouping method is used to reduce the number of freedoms. The model is validated by several experiments performed by foreign investigators and shows acceptable.