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178 ex 66 1 reduced harmonic response analysis antype

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Unformatted text preview: citer Overview Reference: W. T. Thomson, Vibration Theory and Applications, 2nd Printing, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1965, pg. 60, ex. 3.3-1. Analysis Type(s): Reduced Harmonic Response Analysis (ANTYPE = 3) Element Type(s): Combination Elements (COMBIN40) Input Listing: vm88.dat Test Case A counter-rotating eccentric weight exciter of mass m having a mass unbalance mu on an eccentricity e is used to produce forced oscillation of a spring-supported mass. For a viscous damping factor c, determine the amplitude and phase angle Φ of the displacement response when the rotating frequency f is (1) the resonant frequency fn, and (2) f >> fn. Figure 88.1 Eccentric Weight Exciter Problem Sketch Material Properties m = 0.02590673 lb-sec2/in c = 0.11754533 lb-sec/in mu = 0.08 x m k = 30 lb/in ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–200 VM88 Analysis Assumptions and Modeling Notes The node locations are arbitrarily selected. When the rota...
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