The combin40 gap cannot be used in a reduced

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Unformatted text preview: ymin of the mass, neglecting the mass of the rod. Figure 80.1 Plastic Response Problem Sketch Material Properties m = 0.0259 kips-sec2/in E = 30 x 103 ksi σyp = 162.9 ksi Geometric Properties = 100 in A = 0.278 in2 Loading F1 = 30 kips (see time history in Figure 80.1: “Plastic Response Problem Sketch”) ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–181 VM80 Analysis Assumptions and Modeling Notes The initial integration time step (0.004/10 = 0.0004 sec) is chosen small enough to allow the initial step change in acceleration to be followed reasonably well. The final integration time step ((0.14-.004)/68 = 0.002 sec) is based on ≈ 1/60 of the period to produce sufficient printout for the theoretical comparison. The final time of 0.14 sec allows slightly more than 1 cycle of vibration to be followed. POST26 is used to extract results from the solution phase. Results Comparison Target ANSYS[1] Ratio ymax, in 0.806 0.804 0.998 Time, sec 0.0669 0.0680 1.016...
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