摘要
应用特征函数法研究了结构的透空性对可渗弹性海床上圆柱底面渗流波浪力的影响,推导了直柱的一阶绕射波场的压力分布解以及海床内渗流压力分布解,并对作用于圆柱底面上的波浪浮托力和倾覆力矩进行了实算和分析.结果表明:浮托力和倾覆力矩与波浪直接作用可能具有相同量级;而结构的透空性对减弱直接波浪载荷有明显作用,但对波浪所致渗流压力的减弱不明显,甚至可能增加倾覆力矩,造成固立结构的不稳定.
The effect of the porosity of the structure on the wave-induced seepage pressure on the bottom of porous vertical circular cylinder resting on porous elastic seabed was investigated by applying the eigenfunction expansion method.The mathematical solutions to first order diffracted wave pressure on a porous vertical circular cylinder and the seepage pressure on the bottom of porous cylinder were derived.The wave-induced uplift force and overturn moment on the bottom of circular cylinder were calculated and analyzed.The results show that the magnitude of wave-induced uplift force and overturn moment may be similar to that of the horizontal wave loads.The porosity of the structure may lead to a significant reduction in the horizontal wave loads,but has not the same effect on seepage pressure.It may even increase the overturn moment,and result in the instability of the structure resting on porous seabed.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2010年第4期327-330,共4页
Journal of North University of China(Natural Science Edition)
基金
广东省海洋渔业重大科技专项基金资助项目(A200901G5)
关键词
波浪绕射
海床
渗流
波浪载荷
波浪浮托力(矩)
wave diffraction
sea bed
seepage
wave load
wave-induced uplift and moment
