چکیده مقاله
This paper is a numerical simulation and verification of health monitoring of beam structures using propagating piezo actuated lamb waves The goal of this research is to detect the location of a linear crack in a beam using a piezoelectric actuator/impact hammer and a piezoelectric sensor based on the time of flight of propagating waves The actuation signal is first determined based on the propagating lamb wave modes in a thin structure and group dispersion curve of an aluminum plate The commercial finite element code ABAQUS has been employed to model a beam with an actuator sensor pair and a tiny groove representing the crack After a transient dynamic analysis, the sensor response has been acquired Using Hilbert Huang Transform HHT method, from the timeenergy spectrum of sensor response and propagating wave time of flight, location of the crack has been detected
کلیدواژهها
نویسندگان
M.H Soorgee
Graduate Student Advanced Dynamics and Control Systems Lab, Faculty of Mechanical Engineering,University College of Engineering, Campus #۲, University of Tehran, Tehran, Iran
A Yousefi-Koma
Assistant Professor
شیوه ارجاع
Soorgee, M.H and Yousefi-Koma, A,1386,Crack Diagnosis in Beam Structures Using Propagated Lamb Waves and Hilbert Huang Transformation,02nd Tehran International Congress on Manufacturing Engineering (TICME2007),Tehran
ارائهشده در
مجموعه مقالات دومین کنفرانس بین المللی و هشتمین کنفرانس ملی مهندسی ساخت و تولید10 اسفند 1386 · تهران