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Investigation of Dynamical Characteristics of a Core Barrel in Still Water
Author(s): 
Pages: 468-473
Year: Issue:  3
Journal: JOURNAL OF VIBRATION ENGINEERING

Keyword:  结构振动固有频率粘性流体附加质量吊篮;
Abstract: 将吊篮与压力容器视为包含粘性流体的有限长同心圆柱壳体结构.从圆柱壳的运动控制微分方程和流体的N-S方程出发,在流体不可压缩粘性假设下,导出吊篮结构自由振动时,流体作用于壳体结构上的附加质量、附加阻尼矩阵. 再结合固体有限元技术,建立吊篮结构的流固耦合振动的有限元模型.用此模型对吊篮结构在静水中的固有振动特性进行分析,计算结果与试验实测结果的比较表明,本文方法能较好地满足工程分析要求.
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