【作者】 张志强；

【导师】 王科；

【作者基本信息】 大连理工大学 ， 流体力学， 2010， 硕士

【摘要】 随着海洋工程建设持续向深海领域发展,传统的水工结构因造价高昂、技术复杂、施工困难等已不适应深海发展的需要。板式防波堤作为一种新型防波堤结构,由于其造价低廉、修建迅速、受水深和地质条件影响小,海水交换能力强等诸多特点而倍受海岸工程领域的关注。本文在线性理论范围内,利用边界单元法研究了大水深情况下,不同布置形式的组合板式防波堤水动力特性,并给出了板式防波堤的波浪透射系数、反射系数、附加质量、阻尼系数以及波浪力与相对板长和板间距之间的关系。研究发现：(1)“——”型和“(?)”型布置的水面平板式防波堤对短波有较好的消波效果,但无论是有效消波范围还是消波效果,“——”型都要优于“(?)”型。(2)“——”型和“(?)”型布置的水下平板式防波堤对长波和中波有较好的消波效果,“——”型要优于“(?)”型。(3)“||”型水面立板对短波有较好消波效果,“||”型水下立板和“/\”型水下立板消波效果稍差。(4)选择合适的板间距可以使有效消波范围扩大,并减小结构所受的波浪力。更多还原

【Abstract】 With the increasing of naval architectures installed in deep sea, the traditional gravity type breakwaters have been proved to be inefficient. from the viewpoint of economic cost and technical complexity. To overcome this challenge, a new type breakwater consisting of plate system has been pointed out as a substitute. This type breakwater can be constructed fast with low cost and be little affected by water depth and geological conditions. Since it can permit water exchange around plate and the water quality can be maintained. By using of boundary element method, the hydrodynamic study of this plate type breakwater with different configurations has been investigated. The transmitted and reflected wave coefficients, added mass, damping coefficient and wave forces are discussed. It is found that:(1) Both’——’type and’(?)’type surface plates are efficient for short wave elimination. However, the’——’type is better than the’(?)’type.(2) Both’——’type and’(?)’type submerged plates are efficient for long wave and intermediate wave elimination. But the’——’type is better than the’(?)’type.(3) The’||’type surface plate is more effective for shot wave elimination. The’||’type and ’/ \’ type submerged plate are inefficient for wave elimination.(4) Adjusting the plate distance will increase wave elimination and decrease wave exciting force.更多还原