The analyses of dynamic response and reliability for failure-dependent stochastic micro-resonator with thermoelastic coupling effects

The active vibration isolation of low-frequency tilt is important for precise scientific measurement. However, the cross-coupling effects in tilt sensitive probes introduce negative effects on the performance of active isolation devices. In this paper, we show the structure and basic principle of compound pendulum (CP)-type tiltmeter, and analyze the dynamic response of the CP to the two-dimensional tilt vibrations. Besides, we deduce theoretically the mathematical model of the capacitive sensing of the displacements of the CP. Finally, we evaluate numerically the cross-coupling effects of a tilt sensitive probe including the cross-couplings of dynamic response and the different capacitance variations in two orthogonal degrees of freedoms. The maximum of the mechanical dynamic coupling factor is less than −60[Formula: see text]dB. The total cross-coupling coefficients including the different capacitance variations of the probe are both less than [Formula: see text]. Therefore, the cross-coupling effects don’t have to be considered for this kind of two-dimensional tilt sensitive probe.

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Coupling effects of the explosion shock wave and heat radiation on the dynamic response of a fixed-roof tank

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2021.104534 ◽

2021 ◽

pp. 104534

Author(s):

Haisen Liu ◽

Juncheng Jiang ◽

Yunhao Li ◽

Lei Ni ◽

Junjie Wang

Keyword(s):

Shock Wave ◽

Dynamic Response ◽

Heat Radiation ◽

Coupling Effects

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Vibration frequency analysis of an electrically-actuated microbeam resonator accounting for thermoelastic coupling effects

International Journal of Dynamics and Control ◽

10.1007/s40435-014-0132-3 ◽

2014 ◽

Vol 3 (2) ◽

pp. 157-172 ◽

Cited By ~ 11

Author(s):

Pierpaolo Belardinelli ◽

Stefano Lenci ◽

Lucio Demeio

Keyword(s):

Frequency Analysis ◽

Vibration Frequency ◽

Thermoelastic Coupling ◽

Coupling Effects ◽

Electrically Actuated

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Numerical Modeling of Damping Characteristics in a Torsional Micro-Resonator

Volume 9: Micro- and Nano-Systems Engineering and Packaging, Parts A and B ◽

10.1115/imece2012-86152 ◽

2012 ◽

Author(s):

Tathagata Acharya ◽

Michael J. Martin

Keyword(s):

Numerical Modeling ◽

Phase Shift ◽

Aspect Ratio ◽

Dynamic Response ◽

Dynamic Behavior ◽

Ambient Air ◽

Damping Characteristics ◽

Micro Resonator ◽

Parameters Of Interest

The dynamic behavior of torsional micro-resonators with dimensions, 100 μm × 20 μm, 100 μm × 10 μm, 100 μm × 5 μm, and 100 μm × 2.5 μm are modeled under continuum conditions in ambient air and different liquids and at angular frequencies of 1000 Hz and 5000 Hz respectively. The dynamic response in terms of energy lost per cycle, torsional amplitude and the phase shift are calculated and non-dimensionalized suitably. Finally efforts have been made to establish a relationship between the parameters of interest and the aspect ratio.

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Study on the Temperature Distribution Law of Thermoelastic Coupling Field in Concrete Pavement under Tunnel Fire

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1065-1069.716 ◽

2014 ◽

Vol 1065-1069 ◽

pp. 716-720

Author(s):

Zhong Shan Ren ◽

Wo Wang ◽

Lei Zhang ◽

Xiong Lin ◽

Pan Peng

Keyword(s):

Temperature Field ◽

Concrete Pavement ◽

Hysteresis Phenomenon ◽

Thermoelastic Coupling ◽

Coupling Effects ◽

Coupling Field ◽

Material Parameters ◽

Tunnel Fire ◽

Single Temperature ◽

Environment Temperature

Much research work about tunnel fire focused on a single temperature field of tunnel lining structures, and ignored the thermoelastic coupling effects in concrete pavement. Normally, the simplified heating curve sush as the environment temperature curve was adopted, therefore, a mathematical model of the thermoelastic coupling field was established based on finite element method, and the solving algorithm using finite difference method was proposed to analyze tunnel fire problem. Moreover, the results by the above method was also compared to those without considering thermoelastic coupling effects. In addition, the influences of material parameters, such as heat conductivity coefficient, specific heat capacity, elastic modulus and so on, were studied respectively to give the sensitivity of the problem. Through this research, the following conclusions were obtained: the thermoelastic coupling has a certain impact on the temperature field, and it appears the hysteresis phenomenon along the depth direction. Furthermore, when considering the thermoelastic coupling, the temperature of tunnel pavement under fire decreases with the increment of each material parameter respectively, i.e. all the material parameters have similar effects on the temperature field.

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