Transient Dynamic Analysis Jake Blanchard Spring 2008

Introduction ANSYS can solve full dynamic problems (with inertial and damping effects included) Examples include: ◦ Vibration problems ◦ Waves ◦ Collisions ◦ Etc. Time

Key Elements to Analysis Be sure to define density Set up analysis options: ◦ Analysis type is transient (start with “full” method for solution) ◦ Time step must be chosen in context of period of natural frequencies of structure (shoot for about 20 steps within a single oscillation)

Example Cantilever beam Cross section is rectangular, 2.5 cm tall and 1 cm wide Beam length is 2 m 100 N load applied at end of beam for 40 ms E=200 GPa  =0.3  =8000 kg/m 3 Natural frequency of fundamental mode is