A numerical method for calculating the flow-induced vibration of the microstructure profiler

Liu, Yuhong; Lan, Shiquan; Wang, Yanhui; Song, Shenyou; Wu, Zhilin; Zhang, Hongwei

doi:10.1109/oceans.2012.6405065

2012 Oceans 2012

DOI: 10.1109/oceans.2012.6405065

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A numerical method for calculating the flow-induced vibration of the microstructure profiler

Yuhong Liu

Shiquan Lan

Yanhui Wang

et al.

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Cited by 2 publications

References 7 publications

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Structure Optimal Design and Performance Test of Airfoil Shear Probes

Wang

et al. 2015

IEEE Sensors J.

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Airfoil shear probes are instruments used to measure the turbulent kinetic energy dissipation rate in the ocean. The cantilever beams and piezoelectric ceramics sheets are core components of shear probes. The former is the force transferring unit that amplifies the shear force acting on the probe tip. The latter is the piezoelectric transduction element that transforms force to electrical charges. As obbligato components for shear velocity measurement, both the cantilever beam and piezoelectric ceramics sheet have significant influence on the performances of the sensor. Optimizing the dimensions of the cantilever beam and the piezoelectric ceramics sheet could improve the measuring performance of the shear probe, such as sensitivity and resonance frequency. In this paper, multiobjective optimization algorithm is used to obtain the main design parameters of the shear probe with appropriate sensitivity and resonance frequency. Serial tests are conducted including the tap test and the calibration test to examine the resonance frequency in wet mode, and analyze the sensitivity of the probe, respectively. Soon afterward, the sea trials were carried out in the Western Pacific Ocean. The power spectrum from shear velocity data shows a good agreement with the Nasmyth spectrum. The experiments also testify the validity of the optimal design method of the shear probe.

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Structure Optimal Design and Performance Test of Airfoil Shear Probes

Wang

et al. 2015

IEEE Sensors J.

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Vibration Analysis of the Free-Falling Microstructure Profiler

Liu

Yang

Wang

et al. 2016

Journal of Vibration and Acoustics

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Free-falling microstructure profiler (FFMP) is the most effective platform for measuring ocean microstructure turbulence. Vibration is the key factor of influencing the accuracy of the measurement of the shear sensor mounted on the leading end of the FFMP. In the present work, vibration behavior of an FFMP called FFMP1000 was studied through fluid–structure interaction (FSI) simulations and field trials. Vibration characteristics and mechanism of the FFMP1000 were also discussed. Results showed that motion of the FFMP was like a compound pendulum oscillation, and was caused by vortex shedding at the trailing end of the FFMP. Empirical formulas used to predict the oscillation of the FFMP were deduced based on the characteristics of motion behavior and confirmed through sea trials. The present achievement provides scientific guidance for designing optimal hydrodynamic hull shape of the FFMP. It is also useful to estimate the low end detection limit of the FFMP and to modify the turbulence kinetic energy dissipation rate during ocean observations.

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A numerical method for calculating the flow-induced vibration of the microstructure profiler

Cited by 2 publications

References 7 publications

Structure Optimal Design and Performance Test of Airfoil Shear Probes

Structure Optimal Design and Performance Test of Airfoil Shear Probes

Vibration Analysis of the Free-Falling Microstructure Profiler

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