During a vibration measurement test, an impact hammer is used to excite the structure. Asample test on the driver mirror of a vehicle is shown below. During the test, an impacthammer with a force sensor on the tip excites the structure while the oscillations of thestructure is measured with an accelerometer. Assume that the system is underdamped with=0.15 and keqv = 0.8x10' N/m. The force is applied in a short time period (At=1 ms) with aconstant value of 100 N as shown below. If the natural frequency is found to be 500 Hz, derivethe response, and plot the amplitude A(t) in mm vs time between 0 to 0.03 seconds. Now takethe FFT of your time domain solution, A(t) and plot the amplitude vs frequency graph. Showthe value and location of the damped frequency and natural frequency on this graph.f(N)F-ΔΙt(s)

Given: ζ=0.15keq=0.8×107 N/m∆t=1 msF0=100 Nfn=500 Hz To find: Response

Answered: During a vibration measurement test, an…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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