水中悬臂结构振动与水动力特性研究  

Study of hydrodynamic characteristics and vibration of cantilever structure in water

作　　者：张绍文 倪汉根[1] 

机构地区：[1]大连理工大学土木工程系

出　　处：《大连理工大学学报》1996年第3期329-333,共5页Journal of Dalian University of Technology

摘　　要：研究了水中两类悬臂结构（模型）的弯曲自由振动与水动力特性关系．指出扰动水压力对结构的作用相当于在柱上附连分布质量ｍＤ（ｚ），给出了确切算式．分析计算了柱结构在各种水深条件下的总附连水质量ＭＤ及其变化规律，并用“等效质量法”计算了ＭＤ对柱结构自振第一频率降低的程度。This paper studies the hydrodynamic characteristics and its influence on the free bending vibration of two kinds of cantilever structures with water and without water. It points out that the pressure induced by water disturbed is equivalent to an attached distributive mass m D (z) on the column and the exact computational formula is given. Then, the total attached mass M D is calculated and the varied regularities are analysed of column structure in different water levels. Finally, the calculations on effect caused by M D in fundamental frequencies on free vibration of column are carried by using “equivalent masses method”. Furthermore, the results are compared with model test data and the agreement of them is satisfied.

关 键 词：水动力特性 悬臂梁 附连质量 弯曲振动 

分 类 号：TV323[水利工程—水工结构工程]