Study on the Effect of the Impact Location and the Type of Hammer Tip on the Frequency Response Function (FRF) in Experimental Modal Analysis of Rectangular Plates

[摘要] In this work effect of the impact location and the type of hammer tip on the frequency response function (FRF) is studied. Experimental modal analysis of rectangular plates is carried out for this purpose by using impact hammer, accelerometer and fast Fourier transform (FFT) analyzer. It is observed that the impulse hammer hit location has, no effect on the eigenfrequency, yet a difference in amplitude of the eigenfrequencies is obtained. The effect of the hammer tip on the pulse and the force spectrum is studied for three types of tips metal, plastic and rubber. A solid rectangular plate was excited by using these tips one by one in three different tests. It is observed that for present experimental set up plastic tip excites the useful frequency range.

[发布机构] Department of Mechanical Engineering, BITS, K. K. Birla Goa Campus, NH17B Bypass Road, Zuarinagar, Sancoale, Goa, Pilani; 403726, India^1

[效力级别] 机械制造

[关键词] Eigen frequencies;Experimental modal analysis;Experimental set up;Fast Fourier transform analyzers;Frequency ranges;Frequency response functions;Impact locations;Rectangular plates