Dynamic stability of Timoshenko columns subjected to subtangential forces

✍ Scribed by Bong Jo Ryu; Kazuo Katayama; Yoshihiko Sugiyama

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 765 KB
• Volume: 68
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(98)00069-8

✦ Synopsis

This paper deals with the dynamic stability of cantilevered Timoshenko vertical columns having a tip rigid body and subjected to the action of subtangential forces. Here the tip rigid body assumes a rocket motor. The subtangential force can be realized by a combined action of the dead load of the tip rigid body and the pure follower thrust induced by the rocket motor. It is assumed the rocket motor is a rigid body, not a mass point as it has been assumed so far.

It is shown that the tip rigid body does not aect the critical force for a 0.5, whereas for a>0.5, the tip rigid body parameters M*, J* and L * have a great eect on the ¯utter force. The eect of the shear deformation parameter for Sr 10 4 on the critical force is very small. The rotary inertia parameter for R < 10 À4 has negligible eect on the critical force.