三维回转体入水砰击载荷预报

Prediction of the Slamming Pressure on a 3-D Axisymmetric Structure

采用数值仿真的方法研究了三维刚性回转体的入水问题,分析了不同回转角度的回转体的砰击压力峰值的变化规律,并研究了以一定初速度入水时,结构质量对砰击压力的影响。计算结果表明,恒速下降时,砰击压力峰值随角度的增加而下降;初速下降时,随着结构质量增加,砰击压力峰值先急剧增加,然后区域平稳。最后提出了不同回转角度、不同质量系数的回转体在初速下降与恒速下降时砰击压力峰值的预报公式。

Based on t he method of numerical simulation, the water entry of 3-D axisymmetric body was studied. The pressure peak value of the 3-D axisymmetric body with different angle was calculated. The effect of the mass on pressure peak value was studied under initial velocity. The results show that the slamming pressure peak value decreased with the increased values of angle. Under initial velocity the pressure peak value sharply increased firstly and was steady at last. A formula was provided to predict the slamming pressure peak value of axisymmetric body with different angle and mass coefficient under initial velocity and constant velocity.