鱼洗:手―盆―水系统的试验与动力学特征分析

Fish Washbasin: Experiment of Hand-Basin-Water System and Analysis of Its Dynamic Characteristics

针对鱼洗的喷水现象,进行了较详细的动力学理论分析和实验研究。首先,对鱼洗进行了充水和无水下双耳悬挂实验模态分析,完整地得到了鱼洗的前十一阶模态频率,振型和阻尼比;其次,进行了鱼洗的手搓喷水实验,通过工况模态分析理论和算法实现,得到了喷水状态的模态参数。与实验模态分析结果的对比,得到了鱼洗喷水态的动力学特征与模态参数一致的结论;第三,进行了激振器共振实验,用激振器对盆-水系统进行固定频率的稳态激励,得到了各阶模态频率下的共振喷水现象,说明鱼洗在共振激励下可以喷水,且喷水态动力学参数也与模态参数相一致。

A detailed kinetic-theory analysis and an experimental study of Fish Washbasin＇ s water spray phenomenon were carried out. First of all, modals of the Fish Washbasin in full and empty states respectively with the two ears suspended were analyzed experimentally, and the first eleven natural frequencies, modes and damping ratios were obtained. Then, the hand-rub spraying experiment was done. Using the modal analysis theory and the corresponding algorithm, the modal parameters in the spraying state were obtained. In comparison of the results with those from the experimental modal analysis, it was concluded that the dynamic characteristics and the modal parameters of the Fish Washbasin were consistent. Finally, a vibrator resonance experiment was done. With the use of an exciter, continuous excitation with different frequencies was exerted to the basin-water system of the Fish Washbasin, and the resonant spraying phenomena were observed. It means that the Fish Washbasin can spray under the resonant excitation, and the dynamic parameters agree with the modal parameters.