激光脉冲作用引起的梁形微谐振器的振动  

VIBRATION OF MICROSCALE BEAM RESONATOR INDUCED BY LASER PULSE

作　　者：方岱宁[1] 孙玉鑫[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《动力学与控制学报》2006年第2期127-131,共5页Journal of Dynamics and Control

摘　　要：在激光脉冲作用下,有两个因素需要考虑:一个是热传导的非傅立叶效应,另一个是温度场与应变场的耦合导致能量耗散,使物体的机械能转化为热能,并且这是不可逆的.本文综合考虑上面两个因素,研究了激光脉冲作用下微米尺度梁谐振器的热弹性耦合问题.采用Fourier变换与Laplace变换相结合的方法求解梁的横向振动,并分析不同环境温度与能量吸收深度的影响.In ultrashort-pulsed laser heating, two effects become important. One is the non-Fourier effect in heat conduction. The other is the coupling between temperature and strain rate, which causes transform of mechanical energy associated with the stress wave to thermal energy of the material. In this work, a generalized solution for the coupled thermoelastic vibration of a microscale beam resonator induced by pulsed laser heating is developed. The solution takes into account the above two effects. The finite sine Fourier transformation combined with Laplace transformation is used to obtain the lateral vibration of the beam. And the paper analyzes the effect of different laser pulse energy absorptive depth and environment temperature.

关 键 词：热弹性耦合 微米梁谐振器 积分变换 

分 类 号：TB533[理学—物理]