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Unformatted text preview: 001 1.000 Peak Time for Mass Ux 0.2560 0.2559 1.000 Target ANSYS Ratio Maximum Vx of Mass 1.5000 1.5001 1.000 Peak Time for Mass Vx 0.2560 0.2559 1.000 Table E3.2 Case 2: Ramp Input ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 3–7 VME4: Undamped Vibration Absorber
Reference: L. Meirovitch, Elements of Vibration Analysis, 2nd Edition, McGraw-Hill Book
College Division, 1986, pp. 131-134. Analysis Type(s): Explicit Dynamics with ANSYS LS-DYNA Element Type(s): Explicit Spring-Damper Elements (COMBI165)
Explicit 3-D Structural Mass Elements (MASS166) Input Listing: vme4.dat Test Case
A sinusoidal force is applied to the main mass, M1 of the undamped system with a dynamic vibration absorber.
The response of the main mass is zero for the case of a tuned main system / absorber system at steady-state. The
absorber system consists of a spring, K2 and an absorber mass, M2.
M1 = 5 k g
K1 = 10 N/m
M2 = 1 k g
K2 = 10 N/m Geometric Properties
Length of Springs = 1 m
Force of Main Mass = 1.0 sin(10t) (Entered as discrete values
in an array.)
Initial Absorber Mass Velocity = -0.1 m/s Analysis Assumptions and Modeling Notes
As outlined in L. Meirovitch, Elements of Vibration Analysis, if a sinusoidal force, of the form f(t)=Fo sin(ωt), acts on
the main mass of a system with a vibration absorber, and if the forcing frequency equals the n...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.
- Spring '09
- The Land