The failure stresses are input in the nonlinear

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Unformatted text preview: Inc., New York, NY, 1964, pg. 50, ex. E. Analysis Type(s): Reduced Transient Dynamic Analysis (ANTYPE = 4) Element Type(s): 2-D Elastic Beam Elements (BEAM3) Structural Mass Elements (MASS21) Input Listing: vm77.dat Test Case A steel beam of length and geometric properties shown below, is supporting a concentrated mass, m. The beam is subjected to a dynamic load F(t) with a rise time tr and a maximum value F1. If the weight of the beam is considered negligible, determine the time of maximum displacement response tmax and the maximum displacement response ymax. Additionally, determine the maximum bending stress σbend in the beam. Figure 77.1 Constant Force Problem Sketch Material Properties E = 30 x 103 ksi m = 0.0259067 kips-sec2/in Geometric Properties I = 800.6 in4 h = 18 in Loading F1 = 20 kips tr = 0.075 sec = 20 ft = 240 in Analysis Assumptions and Modeling Notes The beam area is not used in this solution and is arbitrarily input as unity. The final time of 0.1 sec allows the mass...
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