Nonlinear Dynamic Behaviors of Liquid and Space Structure in a Low Gravity Condition

对含液体空间结构的非线性耦合动力行为进行了理论和实验研究。1.含液舱空间结构模型的非线性动力特性实验研究：试验模型由直径为60 mm或100 mm的中心胶囊和500 mm长的柔性梁组成。试验模型由两个永磁体或2.4m长的绳索自由悬挂，受电磁力激励。2.液滴非线性动力学行为的实验研究对液滴在振动平面上的非线性动力学行为进行了实验研究。3.实验研究了弹性板上液滴的非线性耦合动力学行为。实验研究了弹性板上水滴的非线性动力学行为。一般情况下，通过加入一滴油，版材的自然脱脂频率会增加，但在特殊情况下，它会增加。实验中观察到了非线性系统特有的亚谐共振响应。4.将悬臂板与附加液滴耦合进行频率分析，将液滴建模为半球形的非粘性液体，进行了线性特征频率分析。

Nonlinear coupled dynamic behavior of a space structure with liquid has been investigated theoretically and experimentally. Subdividing it into four subjects the problem has been treated.1.Experimental studies on nonlinear dynamic behavior of space structure model with liquid contained tank :Test model was composed of central capsule with 60mm or 100mm in diameter and 500 mm length flexible beams as solar panels. The test model was hanged up freely with two permanent magnets or with string with 2.4m long and was excited by electromagnetic force. Dynamic response of the test model was measured by using accelerometer.2.Experimental studies on nonlinear dynamic behavior of liquid dropNonlinear dynamic behavior of a liquid drop on a vibrating plane has been conducted experimentally. The effects of liquid volume, contact angle etc. on the vibration characteristics has been clarified.3.Experimental studies on nonlinear coupled dynamic behavior of a liquid drop attached with an elastic plateNonlinear dynamic behavior of a water drop on a vibrating elastic plate has been investigated experimentally. In general, by adding a drop the natural frequency of a plate degrease, but under a special case, it increases. In the experiment, sub-harmonic resonance response which is peculiar on non-linear system, has been observed.4.Coupled frequency analysis of a cantilever plate with attached liquid drop.Modeling a liquid drop as a non viscous liquid with hemi-spherical shape, linear eigen frequency analysis has been conducted.