Rigid–elastic-thermal coupling dynamics and its application. (7th December 2015)

• Record Type: Journal Article
• Authors: Song, Haiyan; Hou, Gangling; Sun, Hai; Liang, Lifu
• Is Part Of: Advances in mechanical engineering. Volume 7:Number 12(2015:Dec.)
• Publication Date: 2015-12-07
• Subjects: Thermal stress -- thermal effect -- variational principle -- rigid–elastic-thermal coupling dynamics -- thermal stiffening or softening; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814015619766
• Languages: English
• ISSNs: 1687-8132

Abstract

Spacecraft dynamics belongs to rigid–elastic coupling dynamics in general. If thermal stress and thermal effect are further considered, it will cause the more complex rigid–elastic-thermal coupling dynamics. For the aforementioned kind of coupling dynamics, it is difficult to establish the basic equations directly. It has proved that a suitable way to study complex coupling problems is by work–energy theorem and the law of conversation of energy. Using the energy method, Hamilton principle of rigid–elastic-thermal coupling dynamics is established. The stationary value conditions of Hamilton principle of rigid–elastic-thermal coupling dynamics are derived. The physical meaning of the stationary value conditions is indicated. As an application of rigid–elastic-thermal coupling dynamics, the actual example of spacecraft is given to reveal that there existed thermal stiffening or softening problems in rigid–elastic-thermal coupling dynamics, just like dynamic hardening or softening problems in spacecraft dynamics.