Chin. Phys. Lett.  2006, Vol. 23 Issue (6): 1554-1557    DOI:
Original Articles |
Analysis of Frequency Spectrum of Laser-Induced Vibration of Microbeam Resonators
FANG Dai-Ning1;SUN Yu-Xin1;SOH Ai-Kah2
1Department of Engineering Mechanics, Tsinghua University, Beijing 100084 2Department of Mechanical Engineering, University of Hong Kong, Hong Kong
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FANG Dai-Ning, SUN Yu-Xin, SOH Ai-Kah 2006 Chin. Phys. Lett. 23 1554-1557
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Abstract The vibration phenomenon during pulsed laser heating of micro-beams is investigated. The beam is made of silicon and is heated by a laser pulse with a non-Gaussian temporal profile and with an ultrashort pulse duration of 2ps, which incites vibration due to the thermoelastic damping effect. This coupled thermoelastic problem is solved using an analytical--numerical technique based on the Laplace transformation. The damping ratio and resonant frequency shift ratio of beams due to the air damping effect and the thermoelastic damping effect are also examined and discussed.
Keywords: 65.40.De      46.40.Ff      42.62.Cf     
Published: 01 June 2006
PACS:  65.40.De (Thermal expansion; thermomechanical effects)  
  46.40.Ff (Resonance, damping, and dynamic stability)  
  42.62.Cf (Industrial applications)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I6/01554
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