波浪对有梁面板结构冲击作用数值模拟

采用计算机数值模拟方法,在FLUENT软件计算平台上建立了二维规则波数值波浪水槽,对透空有梁面板结构底面受到的波浪冲击作用进行研究。数学模型采用RANS方程和k-ε湍流模型,以VOF方法处理自由表面。通过对不同工况的数值模拟和试验结果比较,验证了模型的造消波性能和应用的有效性。通过计算,得到了波浪冲击过程中波陡、超高和板宽各因素对冲击压强的影响。最后在已有冲击压强计算公式基础上提出了修正公式,以更准确地预报波浪的冲击荷载,深入认识波浪冲击机理。

Numerical simulation of regular wave impact on beam-plate structure

To study the specialties of wave slamming on beam-plate structures,we establish two-dimensional regular wave numerical models based on software FLUENT.Adopting RANS equations and standard equations,VOF method is used to reconstruct the free surface.Comparing typical cases of wave slamming on beam-plate structures,we verify the models by experimental data.With plentiful simulation,we carry out the parametric studies for different wave steepness,structure geometry and the distance between underside of horizontal plate and still water level,and get to know the influences of the three parameters on the impact pressure.Finally,the pressure formulae are improved based on the original calculation formulae of Hohai University.The work is significant for accurately predicting the impact load and mastering more impact mechanism.