摘要
冰激振动中引起的动冰力一直是很受关注的问题。根据精细积分法的基本原理,假定外荷载在离散时间步长内按线性变化,给出了一种冰载荷时域识别方法。经数值算例仿真以及在室内开展的冰激桥墩振动模型试验冰荷载反演的结果表明,该方法形式简洁明了,计算量小,应用方便,特别适宜于计算机求解,具有一定的理论意义和实用价值。
Dynamic ice force of ice-induced vibrations is always the hot and key problem in ice engineering.To develop ice loads identification,precise integration method is proposed to apply.Based on the principle and some assumptions,an improved method for ice load identification is presented by linear interpolation within discrete time.The results of numerical examples and ice-induced pier vibration in the lab show that the precise integration method,compared with other methods,is much more simple in form,effective,and convenient,especially for computer to solve,and is of theoretical and practical values to some extent.
出处
《海洋工程》
CSCD
北大核心
2010年第2期65-70,共6页
The Ocean Engineering
基金
国家自然基金重大研究计划资助项目(90915011)
关键词
冰荷载
识别
精细积分
冰激振动
桥墩
ice load
identification
precise integration
ice-induced vibration
pier
