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Unformatted text preview: ystem shown below for the values of the masses
and spring stiffnesses given. Figure 89.1 Two-mass-spring System Problem Sketch Material Properties
m2 = 2m1 = 1.0 lb-sec2/in
k2 = k1 = 200 lb/in
kc = 4k1 = 800 lb/in ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–202 VM89 Analysis Assumptions and Modeling Notes
The spring lengths are arbitrarily selected and are used only to define the spring direction. Two master degrees
of freedom (MDOF) are selected at the masses in the spring direction. Results Comparison
Target ANSYS Ratio f1, Hz 2.5814 2.5814 1.000 f2, Hz 8.3263 8.3263 1.000 (A1/A2)1 0.92116 0.92116 1.000 (A1/A2)2 -2.1711 -2.1712 1.000 1. Solution Recalculated 2. Normal Modes (UX of node 2 / UX of node 3) ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–203 VM90: Harmonic Response of a Two-Mass-Spring System
Reference: W. T. Thomson, Vibration Theory and Applications, 2nd Printing, Prentice-Hall,
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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