浮托力谱沿直立堤断面的变化  

VARIATIONS OF UPLIFT PRESSURE SPECTRUM ALONG ON THE SECTION OF A VERTICAL BREAKWATER

作　　者：董吉田[1] 

机构地区：[1]国家海洋局第一海洋研究所

出　　处：《海岸工程》1989年第4期10-16,共7页Coastal Engineering

基　　金：国家自然科学基金资助项目

摘　　要：本文提出直立堤上浮托力沿断面分布的三种模式:其一是堤的宽度较大,波浪尺度较小的情况,浮托力为零的点在堤的中部;其二是波浪尺度和堤的宽度适中的情况,浮托力为零的点恰在堤的后踵处;第三种情况是堤的宽度小而波浪的尺度大,浮托力为零的点不在堤的断面上,而在离开堤的一个虚拟点上,浮托力的分布实为梯形分布。为了确定浮托力的分布,我们对浮托力作用范围也作了一些讨论和推断。文中就浮托力谱沿直立堤断面的衰减作了分析和论述,推导出浮托力谱系数沿断面变化的规律。In this paper three models are proposed for sectional distribution of uplift pressures on a vertical breakwater.First the zero-point of the upli- ft presure is in the middle of section in the case of a wider wall section and smaller wave dimensions.Second,the zero-point of the uplift pressure is just at the back toe of a breakwater in the case of moderati wave di- mension and sectional width;Third,in the case of a narrower section and larger wave dimension the zero-point of the uplift pressure is at a virtual point beyond the section,the pressure distribution being in fact of a tra- pezoid configuration.The range of the action of the uplift pressure is also disscussed and inferred with respeot to the distribution of uplift pressures. In this poper the decay of uplift pressare spectrum along wall section is analyzed and expounded and the regular pottern of variations of spectral coefficient along the wall sections is derived.

关 键 词：直立式防波堤 断面 浮托力谱 

分 类 号：U656.22[交通运输工程—港口、海岸及近海工程]