Unformatted text preview: d on 1/30 of the period to produce a fine resolution for the
theoretical comparison. A final time of 0.18 sec is arbitrarily selected.
Area and length parameters are used only with the spar element (LINK1) where the nonlinear spring is treated
as a leaf spring with zero mass. The nodes for the nonlinear spring element (COMBIN39) are defined as coincident
but are shown apart in the model for clarity.
POST26 is used to extract results from the solution phase. The period is determined by the time when the mass
is closest to the original released position after it passes through the spring's equilibrium position. Results Comparison
Target ANSYS Ratio COMBIN39 Vibration, sec 0.1447 0.1440 0.995 LINK1 Vibration, sec 0.1447 0.1440 0.995 1–346 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. VM157: Optimization of a Frame Structure
Reference: B. H. V. Topping, D. J. Robinson, “Selecting Non-Linear Optimization Techniques
for Structural Design”, Intl J. for Computer Aided Engineering and Software: En...
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- Spring '09
- The Land, ........., Test Case