不可压缩粘性流中板状梁的振动附加质量及阻尼  

Added Mass and Damping of Plate Type Beam Vibrating in Incompressible Viscous Fluid

作　　者：杨翊仁[1] 张继业[1] 马建中[2] 蒋自龙[2] 李海宝[2] 

机构地区：[1]西南交通大学应用力学研究所 [2]中国核动力研究设计院

出　　处：《核动力工程》1998年第5期443-449,共7页Nuclear Power Engineering

摘　　要：采用小参数展开法研究开口水槽中板状多跨梁与水槽底面形成小间隙时梁的固有动特性，导出了梁振动时流体的附加质量系数和附加阻尼系数的解析表达式。并通过对频率的计算值与实验值的比较，间接验证了本文结果的正确性。得到了静水中多跨梁的固有频率随间隙值的变化规律。By using the small parameter method,the dynamical characteristics of a multi span wide beam in a water trough are investigated.In the structure,there are gaps between the down surface of the beam and the up surface of bottom plate of the water trough.When the beam vibrating,the analytic solutions of the coefficients of the water added mass and added damping are given out.By comparing the values of calculated frequencies of the structure with those of measured frequencies.the validity of the method in this paper is indirectly verified.Moreover,the change tendencies of the frequencies of the multi span beam with the gaps are studied.

关 键 词：不可压缩粘性流 结构振动 附加质量 附加阻尼 

分 类 号：O352[理学—流体力学]