渔船模拟器中拖网放网过程的数值模拟

Numerical Simulation of the Shooting Process of Trawl in Fishing Simulator

为在渔船模拟器中进行渔网的动态模拟,将渔网网衣离散成通过无质量弹簧相连的节点集合,采用集中质量法建立网衣在均匀流作用下的运动响应数学模型,通过指数矩阵精细积分法对网衣的非线性动力方程进行求解,得到网衣各节点的位置和速度信息。该数值方法具有很高的精度和效率,为验证数值模拟的正确性和有效性,将本文结果同水槽试验结果进行比较,通过仿真数据分析可知数值方法的准确性。

The aim of the present study was to develop a numerical calculation method to accomplish dynamic simulation of the net in the fishing simulator.Fishing nets were modeled as a group of lumped mass points interconnected with springs that have no mass in the uniform flow motion under.Nonlinear dynamic equations of fishing nets were solved through exponential matrix in the precise integration method,which the position and velocity can obtained by solving the model.Comparing the results of numerical calculation and associated experiment data show that the solving method of warp model is reliable,while the real-time simulation was ensured.This study shows that our method is valid for the simulation of fishing net.