直立式防波堤水动力特性及稳定性研究
发布时间：2018-10-20 19:40
【摘要】：直立式防波堤是最常用的外海防护建筑物和护岸建筑物之一，，作用于它的主要荷载是波浪力。由于其堤身整体性好，水上安装工作量小，不需要大型起重设备，施工进度快，箱中填以砂砾可降低造价等优点近些年来，广泛应用于港口工程建设。 本文从物理模型试验和数值计算两方面对直立式沉箱防波堤进行了深入研究，首先，为了研究直立式沉箱防波堤上波浪力分布规律，寻求适合于此类型防波堤的波浪力计算公式，基于波浪水槽物理模型试验，对作用于堤身的波浪压力试验数据进行分析，得到作用在防波堤上的水平力和浮托力分布特性；针对试验结果计算分析，提出了合田良实波浪力计算公式的修正方法，使其适用于直立式沉箱防波堤计算波浪力。其次，由于作用在防波堤身的波浪力之间、波浪力矩之间具有高相关性，因此采用考虑相关变量的可靠性分析方法，提出直立式沉箱防波堤的抗滑移、抗倾覆破坏的设计表达式。最后利用弹性理论，刚性理论进行模型处理，进一步计算直立式防波堤在波浪力的作用下期望滑移量的变化。 在以上物理模型研究的基础上，本文通过试验对直立式沉箱防波堤的波浪力进行研究，从数值计算角度进行了模拟、对合田良实公式进行修正，对直立堤的可靠度和滑移量的计算研究。
[Abstract]:Vertical breakwater is one of the most commonly used offshore protective buildings and shore protection buildings. The main load acting on it is wave force. Due to its advantages such as good integrity of embankment, small workload of installation on water, no need of large lifting equipment, rapid construction progress and the advantages of reducing cost by filling the box with gravel, it has been widely used in port engineering construction in recent years. In this paper, the vertical caisson breakwater is studied in terms of physical model test and numerical calculation. Firstly, in order to study the distribution of wave force on vertical caisson breakwater, Based on the wave flume physical model test, the wave pressure test data acting on the embankment are analyzed, and the distribution characteristics of the horizontal force and the floating support force acting on the breakwater are obtained. Based on the calculation and analysis of the test results, a modified method for calculating the wave force in Hedan is put forward, which is suitable for the calculation of wave force in vertical caisson breakwater. Secondly, because of the high correlation between the wave force and the wave moment of the breakwater, the reliability analysis method considering the relevant variables is used to put forward the anti-slip of the vertical caisson breakwater. A design expression for resistance to overturning. Finally, the elastic theory and the rigid theory are used to model the vertical breakwater to calculate the expected slip under the action of the wave force. On the basis of the above physical model research, the wave force of vertical caisson breakwater is studied by experiments, and the numerical calculation is carried out to modify the formula. The reliability and slip of vertical embankment are calculated and studied.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.2
本文编号：2284185
[Abstract]:Vertical breakwater is one of the most commonly used offshore protective buildings and shore protection buildings. The main load acting on it is wave force. Due to its advantages such as good integrity of embankment, small workload of installation on water, no need of large lifting equipment, rapid construction progress and the advantages of reducing cost by filling the box with gravel, it has been widely used in port engineering construction in recent years. In this paper, the vertical caisson breakwater is studied in terms of physical model test and numerical calculation. Firstly, in order to study the distribution of wave force on vertical caisson breakwater, Based on the wave flume physical model test, the wave pressure test data acting on the embankment are analyzed, and the distribution characteristics of the horizontal force and the floating support force acting on the breakwater are obtained. Based on the calculation and analysis of the test results, a modified method for calculating the wave force in Hedan is put forward, which is suitable for the calculation of wave force in vertical caisson breakwater. Secondly, because of the high correlation between the wave force and the wave moment of the breakwater, the reliability analysis method considering the relevant variables is used to put forward the anti-slip of the vertical caisson breakwater. A design expression for resistance to overturning. Finally, the elastic theory and the rigid theory are used to model the vertical breakwater to calculate the expected slip under the action of the wave force. On the basis of the above physical model research, the wave force of vertical caisson breakwater is studied by experiments, and the numerical calculation is carried out to modify the formula. The reliability and slip of vertical embankment are calculated and studied.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.2
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