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.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
1998年第5期443-449,共7页
Nuclear Power Engineering
关键词
不可压缩粘性流
结构振动
附加质量
附加阻尼
Incompressible viscous fluid Plate type structure Added mass Added damping
