基于波面随机性的船舶底部砰击压力计算方法研究

基于海浪波面的随机特性,研究船舶底部砰击压力的计算方法.分析纵向入水角对船底砰击压力量值的影响程度,建立二者之间的定量关系.在预报船舶砰击压力时引入随机海浪的波面条件,计及船舶运动和海浪波面倾角因素对砰击压力的影响.采用蒙特卡罗数值模拟法对砰击压力的统计规律进行研究,结果表明:计及纵向入水角的船底砰击压力计算方法.更加...

Calculation Method of Bottom Slamming Pressure Based on Randomness of Wave Surface

The paper studied the prediction method of ship bottom slamming pressure based on the randomness of ocean wave surface.The effect of longitudinal angle between keel and wave surface on slamming pressure was analyzed and the quantitative relationship was established.The factors of ship motion and inclination angle of wave were considered by introducing wave surface condition while calculating slamming pressure of ship bottom.Monte-Carlo simulation method was used to study the statistics characters of slamming pressure with the same relative velocity between ship sections and wave surface.The results show that the method of ship bottom slamming pressure calculation considering the longitudinal angle can properly reflect the influences of factors in terms of wave surface condition and bottom wave surface.This study provides the foundation for a further study of extreme value of slamming pressure at short-term sea state.