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.

已经研究了在低重力条件下与液体附着的薄壁结构的非线性耦合动态行为。这个问题被细分为两个主题。针对球形液滴部分受到部分约束的部分液体滴理论分析的自由振动分析。并使用水滴，进行了相应的实验研究。比较两个结果，都获得了定性协议。用液体测试结构附着的弯曲火焰结构的动态行为的实验研究是用塑料梁构建的，并用弹簧和橡皮筋悬挂在天花板上，这些束在空间中以结构为单位。附着的液体是通过“弹簧质量”或“束质量”建模的。测试结构通过电磁激发仪在谐波上激发，以测量谐波响应。使用了三轴加速拾取，并通过三维运动分析系统观察到振动模式。