Unformatted text preview: shown. Figure 182.1 Spring-mass System Problem Sketch ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–409 VM182
k1 = 6 N/m
k2 = 16 N/m
m1 = 2 Kg
m2 = 2 Kg Loading
F0 = 50 N
td = 1.8 sec Analysis Assumptions and Modeling Notes
COMBIN40 combination elements are used to represent the springs and masses. Node locations are arbitrary.
The response of the system is examined for an additional 0.6 seconds after the load is removed. Results Comparison
Target ANSYS Ratio Y1 , m (@ t = 1.3s) 14.48 14.40 0.995 Y2 , m (@ t = 1.3s) 3.99 3.95 0.990 Y1 , m (@ t = 2.4s) 18.32 18.40 1.004 Y2 , m (@ t = 2.4s) 6.14 6.16 1.003 Figure 182.2 POST26 Displacement Display 1–410 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. VM183: Harmonic Response of a Spring-mass System
Reference: R. K. Vierck, Vibration Analysis, 2nd Edition, Harper & Row Publishers, New York,
NY, 1979, sec. 4-2. Analysis Type(s): Mode-frequency Analysis (ANTYPE = 2)
Harmonic Response Mode Superposition Analysis (ANTYPE = 3) Element Type(s): Combi...
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