Experimental whole-field interferometry for transverse vibration of plates

Ma, Chien‐Ching; Huang, Chi-Hung

doi:10.1016/s0022-460x(03)00276-1

Cited by 34 publications

(3 citation statements)

References 18 publications

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“…These uncertainties will contribute to the interferogram and cause errors in the final result. Although methods have been developed to reduce or eliminate the errors caused by environmental reasons in interferometry measurements (e.g., subtracting technique in electronic speckle pattern interferometry (ESPI)) [40][41][42][43][44], these methods have not been applied in the investigations of protein crystallization (including measurements of protein concentration, and the advancement of crystallographic faces during crystal growth or dissolution). Since protein crystallization is a rather time-consuming process, the errors caused by the environmental disturbances must be taken into account in the concentration measurement during crystallization.…”

Section: Introductionmentioning

confidence: 99%

Interferometry measurement of protein concentration evolution during crystallization and dissolution with improved reliability and versatility

Yin

Inatomi

Luo

et al. 2008

Meas. Sci. Technol.

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Interferometry is a widely used technique for real-time monitoring of concentration variation during processes in a solution like crystal growth and dissolution. This paper reports a protein concentration measurement system using a conventional Mach–Zehnder interferometer that allows monitoring the time course evolution of the protein concentration distribution during the processes of crystallization or dissolution. The demonstrated method showed improved reliability and versatility in that it (1) enables measurements under versatile temperature conditions and (2) eliminates the unpredictable errors caused by the environmental disturbances. The measurement system described in this paper can also be applied in measurements in other solution systems.

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Section: Introductionmentioning

confidence: 99%

Interferometry measurement of protein concentration evolution during crystallization and dissolution with improved reliability and versatility

Yin

Inatomi

Luo

et al. 2008

Meas. Sci. Technol.

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“…The holography-based techniques such as classical and digital time-averaged holography, holographic interferometry, and electronic/digital speckle pattern interferometry ͑ESPI/DSPI͒ have been frequently applied for vibration studies. [5][6][7][8][9][10] While holographic techniques are very effective for measuring out-of-plane displacements of very small magnitudes, moiré methods [11][12][13][14] are well-suited for determining relatively large out-of-plane displacements. Speckle techniques have been used for recording in-plane vibrational displacement.…”

Section: Introductionmentioning

confidence: 99%

Determination of vibration parameters of a large-scale structure by measuring the visibility changes on the time-averaged images of a sinusoidal pattern fixed on it

Rasouli

Tavassoly

2008

Opt. Eng.

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Specification of vibration modes, amplitudes, and damping coefficients of structures are crucial issues in civil and mechanical engineering. Several techniques have been used for this kind of studies, including holographic interferometry, speckle interferometry, and moiré technique. But, for a large-scale structure, the modal analysis technique is usually used. We use the time-averaged digital image of a sinusoidal pattern fixed on a vibrating 6-m iron I-beam to study in-plane vibration. The study includes specification of vibrating modes, amplitudes, and damping coefficients. Using a wide-angle high-resolution digital camera, successive images of the vibrating pattern are recorded in exposure times much longer than the vibration period and much shorter than the relaxation time. The visibility measurement along the images leads to the specification of the mentioned parameters.

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“…In Ref. [19] the experimental whole-field interferometry for investigation of the transverse vibration of plates is used.…”

Section: Introductionmentioning

confidence: 99%

Transversal vibrations of double-plate systems

Hedrih

2006

Acta Mech Mech Sinica

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This paper presents an analytical and numerical analysis of free and forced transversal vibrations of an elastically connected double-plate system. Analytical solutions of a system of coupled partial differential equations, which describe corresponding dynamical free and forced processes, are obtained using Bernoulli's particular integral and Lagrange's method of variation constants. It is shown that one-mode vibrations correspond to two-frequency regime for free vibrations induced by initial conditions and to three-frequency regime for forced vibrations induced by one-frequency external excitation and corresponding initial conditions. The analytical solutions show that the elastic connection between plates leads to the appearance of twofrequency regime of time function, which corresponds to one eigenamplitude function of one mode, and also that the time functions of different vibration modes are uncoupled, for each shape of vibrations. It has been proven that for both elastically connected plates, for every pair of m and n, two possibilities for appearance of the resonance dynamical states, as well as for appearance of the dynamical absorption, are present. Using the MathCad program, the corresponding visualizations of the characteristic forms of the plate middle surfaces through time are presented.

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Experimental whole-field interferometry for transverse vibration of plates

Cited by 34 publications

References 18 publications

Interferometry measurement of protein concentration evolution during crystallization and dissolution with improved reliability and versatility

Interferometry measurement of protein concentration evolution during crystallization and dissolution with improved reliability and versatility

Determination of vibration parameters of a large-scale structure by measuring the visibility changes on the time-averaged images of a sinusoidal pattern fixed on it

Transversal vibrations of double-plate systems

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