Experimental Study on Sloshing Characteristics in the Elastic Tank Based on Morlet Wavelet Transform

Hydroelastic effect of sloshing is studied through an experimental investigation. Different excitation frequencies are considered with low-fill-depth and large amplitude. Morlet wavelet transform is introduced to analyze the free surface elevations and sloshing pressures. It focuses on variations an...

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Bibliographic Details
Published in:China ocean engineering 2018-08, Vol.32 (4), p.400-412
Main Authors: Jiang, Mei-rong, Zhong, Wen-jun, Yu, Jian-xing, Liu, Pei-lin, Yin, Han-jun, Wang, Shou-dong, Ma, Yu-xiang
Format: Article
Language:English
Subjects:
Coastal Sciences
Energy
Engineering
Excitation
Fluid- and Aerodynamics
Free surfaces
Marine & Freshwater Sciences
Morlet wavelet
Numerical and Computational Physics
Oceanography
Offshore Engineering
Resonant frequencies
Resonant frequency
Simulation
Spectra
Tanks
Wavelet analysis
Wavelet transforms
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Summary:Hydroelastic effect of sloshing is studied through an experimental investigation. Different excitation frequencies are considered with low-fill-depth and large amplitude. Morlet wavelet transform is introduced to analyze the free surface elevations and sloshing pressures. It focuses on variations and distributions of the wavelet energy in elastic tanks. The evolutions of theoretical and experimental wavelet spectra are discussed and the corresponding Fourier spectrums are compared. Afterwards, average values of the wavelet spectra are extracted to do a quantitative study at various points. From the wavelet analysis, sloshing energies are mainly distributed around the external excitation frequency and expanded to high frequencies under violent condition. In resonance, experimental wavelet energy of the elevation in elastic tanks is obviously less than that in the rigid one; for sloshing pressures, the elastic wavelet energy close to the rigid one and conspicuous impulse is observed. It recommends engineers to concern the primary natural frequency and impulsive peak pressures.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-018-0042-9