Nonlinear Coupled Dynamic Behavior of Liquid and Thin-Walled Structure in a Low Gravity Condition

低重力条件下液体与薄壁结构的非线性耦合动态行为

• 批准号: 12650221
• 负责人: CHIBA Masakatsu
• 金额: $ 2.43万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650221/
• 关键词: Low Gravity; Space Structure; Liquid; Coupled Vibration; 流体

Nonlinear coupled dynamic behavior of a thin-walled structure attached with liquid in a low gravity condition has been investigated. The problem was subdivided into two subjects.I. Free vibration analysis of a partially constrained liquid dropTheoretical analysis has been conducted for a spherical liquid drop partially constrained. And using a water drop, corresponding experimental studies have been carried out. Comparing both results, qualitative agreement was obtained.II. Experimental study on dynamic behavior of flexural flame structure attached with liquidTest structures were constructed with plastic beams and hanged from the ceiling with spring and rubber band, which modeled as structure in space. Attached liquid was modeled by "spring-mass" or "beam-mass". Test structure was harmonically excited by electro-magnetic exciter to measure the harmonic response. Three-axis acceleration pick-up was used and vibration mode was observed by three dimensional motion analysis system.

研究了轻重力条件下液体附着薄壁结构的非线性耦合动力学行为。这个问题被细分为两个主题。部分约束液滴的自由振动分析本文对部分约束球形液滴进行了理论分析。并利用水滴进行了相应的实验研究。比较两种结果，获得定性一致。受液体附着的弯曲火焰结构动力特性的实验研究试验结构由塑料梁构成，用弹簧和橡皮筋悬挂在天花板上，模拟空间结构。附着液体采用“弹簧-质量”或“梁-质量”模型。利用电磁激振器对试验结构进行简谐激励，测量结构的简谐响应。采用三轴加速度传感器，通过三维运动分析系统观察振动模态。