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文章采用数值模拟方法,建立了基于FLUENT软件的二维不规则波浪数值模型,探讨了波浪对水平板结构的作用机理。模型中采用RANS方程和标准k-ε方程,采用VOF方法重建自由液面。通过数值模拟复演了波浪冲击水平板结构的过程,将数值模拟结果与实验数据进行比较,验证了模型的可靠性。经过计算和分析,研究了波浪冲击平板过程中的冲击压力和流场特性,得到了冲击压力和流场的分布规律。分析了波陡,净空及板宽等参数对冲击压力和流场的影响。最后,给出了波浪冲击压力与相应水质点垂直速度间的统计关系,并对河海大学原有冲击压力的计算公式进行了改进,提出了新的冲击压力公式。研究结果表明:冲击压力峰值与相应的水质点垂直速度的平方成正比,修正后的冲击压力公式更为合理、可行。论文工作将对准确预测冲击载荷,掌握更多的冲击机理具有重要意义。
The numerical simulation method is used to establish a two-dimensional irregular wave numerical model based on FLUENT software, and the action mechanism of wave on the horizontal plate structure is discussed. In the model, the RANS equation and the standard k-ε equation are adopted, and the free surface is reconstructed by the VOF method. The process of wave impact on the horizontal plate structure is simulated by numerical simulation. The numerical simulation results are compared with the experimental data to verify the reliability of the model. After calculation and analysis, the impact pressure and flow field characteristics of wave impact plate are studied, and the distribution of impact pressure and flow field are obtained. The effects of wave steepness, clearance and plate width on the impact pressure and flow field are analyzed. Finally, the statistical relationship between the wave impact pressure and the vertical velocity of the corresponding water quality point is given. The formula of the original impact pressure of Hohai University is improved, and a new impact pressure formula is proposed. The results show that the peak value of impact pressure is proportional to the square of the vertical velocity of the corresponding water quality point, and the modified formula of impact pressure is more reasonable and feasible. Paper work will accurately predict the impact load, to grasp more impact mechanism is of great significance.