海洋桥梁施工围堰的波浪压力实测与数值模拟

发布时间：2018-04-06 06:08

本文选题：海洋桥梁　切入点：波浪压力　出处：《西南交通大学学报》2017年03期

【摘要】：为研究海洋桥梁施工围堰在波浪作用下波浪压力的分布规律,通过现场实测及数值模拟的方法,对海洋桥梁施工过程中使用的大尺度钢围堰表面波浪压力进行了研究.基于三维绕射理论,使用代表波法,对实测有效波高进行规则波模拟,确定了波压力峰值沿围堰表面的分布规律以及随水深的变化规律,并对围堰表面的波浪动压力峰值进行了分析,并与实测值进行了对比.结果表明:三维绕射理论能合理地模拟围堰表面波压力分布;在绕射效应的影响下,波浪总压力、波浪动压力均呈现出迎浪侧大、背浪侧小的特点,波浪动压最大增幅可达125%;实测总压力随水深增加而增加,波浪动压力峰值随水深增加而减小.
[Abstract]:In order to study the wave pressure distribution law of ocean bridge construction cofferdam under wave action, the wave pressure on the surface of large scale steel cofferdam used in the construction of ocean bridge was studied by the method of field measurement and numerical simulation.Based on the three-dimensional diffraction theory and the representative wave method, the regular wave simulation of the measured effective wave height is carried out, and the distribution law of the wave pressure peak along the surface of the cofferdam and the variation law with the water depth are determined.The peak value of wave dynamic pressure on cofferdam surface is analyzed and compared with the measured value.The results show that the three-dimensional diffraction theory can reasonably simulate the surface wave pressure distribution of the cofferdam, and under the influence of diffraction effect, the total wave pressure and the wave dynamic pressure show the characteristics of large wave side and small back wave side.The maximum increase of wave dynamic pressure can reach 125, the measured total pressure increases with the increase of water depth, and the peak value of wave dynamic pressure decreases with the increase of water depth.
【作者单位】：西南交通大学桥梁工程系;中铁大桥勘测设计院集团有限公司;
【分类号】：U445.556

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