This preview shows page 1. Sign up to view the full content.
Unformatted text preview: me Display ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–165 VM73: Free Vibration with Coulomb Damping
Reference: F. S. Tse, I. E. Morse, R. T. Hinkle, Mechanical Vibrations, Allyn and Bacon, Inc.,
Boston, MA, 1963, pg. 175, case 1. Analysis Type(s): Full Transient Dynamic Analysis (ANTYPE = 4) Element Type(s): Combination Elements (COMBIN40) Input Listing: vm73.dat Test Case
A spring-mass system with coulomb damping is displaced a distance ∆ and released. Dry friction is assumed to
act as a limiting sliding force F between the sliding mass and the surface. Determine the displacement u at various
times t. Figure 73.1 Free Vibration Problem Sketch Material Properties
W = 10 lb
k2 = 30 lb/in
m = W/g Loading
∆ = -1 in
F = 1.875 lb Initial Conditions
t=0 X -1. 0. Analysis Assumptions and Modeling Notes
One combination element is used with the slider in parallel with the spring. The slider spring constant (k1 =
10,000 lb/in) is arbitrarily selected high en...
View Full Document
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