This preview shows page 1. Sign up to view the full content.
Unformatted text preview: displacements for Joints 2, 4, and 8 instead of Joints 2, 3, and 4 (there is no need to reproduce Table 13.4); (ii) For Table 13.5, print out the first six modes instead of the first three modes. (b) You should find that the natural frequencies of vibration for this structure pair up that is to say, for every mode there is another mode whose frequency is very close to the frequency of the given mode. By examining the mode shapes, describe why this is happening in this structure. Notes : The following step-by-step inputs need to be modified in order to obtain a proper analysis: i) In the step Load Function (page 421), the second line of input should be Enter Time=0.02, Value=1.0, then press ADD. ii) In the step Assign Load (page 421), the first line should read Click on joint 8 and enter iii) In the step Plot Displacement Function (page 424), the seventh line of this step should read Mode Number = Include All. Then OK, OK....
View Full Document
This note was uploaded on 05/09/2008 for the course CE 573 taught by Professor Whalen during the Fall '05 term at Purdue University-West Lafayette.
- Fall '05