基于摇板式造波机的无反射造波仿真

在海洋工程水池试验中,造波机与模型之间的二次波浪反射严重影响试验结果的准确性和可靠性。在势流理论的基础上,采用边界元法建立了二维线性数值波浪水池。通过数值模拟结果与解析解的比较,证实该数值波浪水池的适用性。采用全相位频谱分析方法作为水动力反馈,对入射和反射波进行分离,以分离的反射波信号控制摇板运动以达到吸收二次反射波浪的目的。在此基础上,对摇板式造波机在数值波浪水池中进行了无反射造波仿真试验。仿真结果表明,采用无反射造波后,能有效减弱波浪的二次反射。

Simulation of Non-Reflective Wave Making by Flap-Type Wave-Maker

There are some adverse impacts on the accuracy and reliability of test results due to the second wave reflection between wave-maker and the model during the tank testing.A two dimensional linear numerical wave tank was built by the boundary element method according to the potential flow theory.The simulation was carried out to obtain the numerical results,and the applicability of this numerical wave tank was verified by comparison with the analytical solutions.In order to absorb second wave reflection,all phase spectrum analysis theory was adopted to obtain hydrodynamic feedback to separate the incident wave from the reflected wave,by which the movement of flap can be controlled.Simulation results show that using the non-reflective wave making can weaken the second wave reflection effectively.