充液对箱形多腔结构振动特性的影响

宋玉超;于洪亮

振动与冲击 ›› 2009, Vol. 28 ›› Issue (11) : 159-162.

PDF(1150 KB)
PDF(1150 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (11) : 159-162.
论文

充液对箱形多腔结构振动特性的影响

  • 宋玉超;于洪亮
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THE INFLUENCE OF LIQUID ON VIBRATION CHARACTERISTIC OF BOXED MULTI-TANK STRUCTURE

  • SONG Yu-chao;YU Hong-liang
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摘要

为研究充液对箱形多腔结构振动特性的影响,运用数值有限元方法建立多腔结构及其单元腔室的模型,计算分析了不同充液工况对系统振动频率的影响,其中不同充液比的充液工况由正交优化试验方法确定,最后通过弹簧振子模型研究多单元系统的频率变化.结果表明:在同一充液比的充液工况中,单腔及多腔结构在低充液比时结构第一阶频率有微小幅度的升高,1、3腔同时充液时结构频率随充液比的增加降低最大;在不同充液比的充液工况中,总充液量、充液比及充液比的排列都是影响多腔结构第一阶频率的因素;弹簧-振子模型说明单元改变引起局部振动频率变化是多单元系统频率呈现不规则变化的原因.

Abstract

The numerical analysis was used to take modal analysis of multi-tank structure, which aimed to better understand the vibration characteristics of multi-tank structure with liquid, to provide the effect of liquid cases on the vibration frequency of multi-tank structure. The liquid cases with different full rate were chosen by the orthogonal optimization test method. The spring-mass model was lastly introduced to illuminate the frequency shift of multi-cell system. The results show that in the liquid cases with the same full rate, the first frequency of single tank and multi-tank structure all increase at low depth with mini magnitude, the frequencies decrease most with the increase of full rate when the 1st and 3rd tanks are simultaneously filled of liquid. In the liquid cases with different full rate, the first frequency of multi-tank structure is affected by the total liquid, full rate and the arrangement of full rate. The spring-mass modal illuminates that the local frequency which is induced by cell is one key of the abnormal phenomenon of multi-cell system.

关键词

多腔结构 / 充液 / 振动频率 / 正交优化试验方法 / 数值分析 / 弹簧振子

Key words

multi-tank structure / filling liquid / vibration frequency / orthogonal optimization test method / numerical analysis / mass-spring

引用本文

导出引用
宋玉超;于洪亮. 充液对箱形多腔结构振动特性的影响[J]. 振动与冲击, 2009, 28(11): 159-162
SONG Yu-chao;YU Hong-liang. THE INFLUENCE OF LIQUID ON VIBRATION CHARACTERISTIC OF BOXED MULTI-TANK STRUCTURE[J]. Journal of Vibration and Shock, 2009, 28(11): 159-162

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