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Unformatted text preview: tics and Dynamics, the magnitude of the bar's angular velocity when θ = 0°, can be written as, | ω| = 0. 402 g ( L - 2a) L2 − 3 La + 3a2 assuming the bar is released at θ = 30°. Based on the geometry chosen for this analysis, it can be seen that, at the time the bar passes through θ = 0°, ω = vx / 0.75, where vx is the translational velocity in the global Cartesian x-direction of the end of the bar. Twenty-eight BEAM161 elements were used to model the bar. Results Comparison Target | Angular Velocity | when θ = 0° (rad/sec) ANSYS Ratio 2.121 2.07 0.976 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 3–11 VME6: Projectile with Air Resistance Overview Reference: J. B. Marion, S. T. Thornton, Classical Dynamics of Particles & Systems, 3rd Edition, Saunders College Publishing, 1988, pp. 60-63. Analysis Type(s): Explicit Dynamics with ANSYS LS-DYNA Element Type(s): Explicit 3-D Structural Solid Elements (SOLID164) Input Listing: vme6.dat Test Case A projectile is subjected to gravity and air resistance loading. The total travel time and travel distance are calculated for an assumed initial velocity and air resistance proportionality constant, k. Figure E6.1 Projectile with Air Resistance Problem Sketch ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 3–12 VME6 Material Properties Geometric Properties Projectile Project...
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