水中悬臂圆柱附连水质量的简化计算方法  

SIMPLIFIED CALCULATION METHOD FOR DEALING WITH ADDED WATER MASS FOR IMMERSED CANTILEVER CYLINDER

作　　者：于越 欧亿鹏 刘哲[1] 李遇春[1] YU Yue;OU Yipeng;LIU Zhe;LI Yuchun(Department of Hydraulic Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院水利工程系,上海200092

出　　处：《力学与实践》2020年第2期184-188,共5页Mechanics in Engineering

基　　金：国家自然科学基金资助项目(51879191)。

摘　　要：采用解析方法研究了部分浸入水中的圆形悬臂柱的附连水质量分布,给出了无量纲的质量分布系数,通过对质量分布系数的数值拟合分析,附连水质量效应可最终表达为结构的等效质量密度,在振动计算中只需将浸入水中的悬臂柱密度用等效密度替代即可。采用试验方法测量了部分浸入水中的悬臂柱湿频率,简化附连水质量方法计算的湿频率结果与试验测量值吻合很好,表明本文的附连水质量简化公式可很好地描述附连水的质量效应。The distribution of the added water mass is investigated for an immersed cantilever cylinder through an analytical method.A non-dimensional coefficient for the mass distribution is derived.With a numerical fitting analysis of the mass distribution,the effect of the added water mass can be expressed as the equivalent mass density of the structure.The mass density of the immersed cylinder is replaced with the equivalent mass density in the vibration analyses.The wet frequencies of the immersed cylinders are experimentally studied.The wet frequencies obtained by the present simplified(added water mass)method agree well with the experimental results.It is shown that the mass effect of the around water can be well described by the present simplified formula.

关 键 词：水中悬臂圆柱 附连水质量 简化计算 

分 类 号：TV311[水利工程—水工结构工程]