Study on vibration of dragon wash basin and free surface waves inside
作者机构：School of MechanicsCivil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710129China School of Marine Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710072China
出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)
年 卷 期：2019年第35卷第1期
页 面：15-23,I0001页
核心收录：
学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）]
基 金：the National Natural Science Foundation of China(Grants 11172241 and 11472220)
主 题：Dragon wash basin Eigen-mode vibration Surface wave
摘 要：We conducted experimental and numerical studies on the vibrating modes of a dragon wash basin (DWB) and the free surface waves inside the DWB. Both the vibration of the DWB and the sound produced were studied carefully. It was found that the DWB can be excited at different intrinsic modes under different excitation, including striking and rubbing it fast/slowly. However, with gentle rubbing, the DWB will be excited mainly at the first vibrating mode. We showed that the concave side wall of a DWB decreases the intrinsic frequencies (compared with a straight side wall), and the ears of a DWB lead to breaking of the vibrating-axisymmetry and cause the separation of modes I/II and IV/V as well. A theoretical model, in which the water is assumed to be incompressible and inviscid, is applied to the first order vibration and predicts the relation of vibrating frequency versus water depth in the system. The measurement shows that both the radial and azimuthal waves are produced as DWB is working. The frequency of the first component of the surface wave is twice as large as the second one induced by non-linear effects. For both the radial and azimuthal waves, the dispersion relation is presented in the framework of capillary wave theory.
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