摘要
大尺度垂直柱体是海洋工程结构物的一种典型结构型式。地震时它们遭受的水动作用力是抗震设计中的一个重要考虑因素。尤其当多柱共存且相距不远时,柱间的干扰将导致柱体振动时流体动力特性的改变。本文发展了地震作用下单柱振动的奇点分布法,可用于计算地震时大尺度垂直柱群振动的流体作用力,并初步探讨了柱间间距对流体作用力变化的影响。在我们的讨论中,柱的截面可以是任意的,柱与柱间截面也可以不同。
Some offshore structures consist of several uniform vertical cylinders of arbitrary section which are in close proximity to each other.The in- teraction between the vibration of them and fluid motion during earthqu- akes is,a factor of importance in the anti-seismic design.For those special cylindrical bodies,a new type of local disturbance source has been qiven by the present authors,which,being distributed on the sectional contour of the cylinders,was used to estimate the three-dimensional hydrodynamic forces on a single cylinder of arbitrary section oscillating or vibrating in still waters during earthquakes.In the present paper,the solution method is extended to investigate the hydrodynamic forces on multiple large vertical cylinders of arbitrary section and the dynamic interference between them.
出处
《海岸工程》
北大核心
1990年第3期1-8,共8页
Coastal Engineering
