摘要
A consistent focus in theoretical mechanics has been on how to apply Lagrange's equation to continuum mechanics.This paper uses the concept of a variational derivative and its laws of operation to investigate the derivation of Lagrange's equation,which is then applied to nonlinear elasto-dynamics.In accordance with the work-energy principle and the energy conservation law,kinetic and potential energies are proposed for rigid-elastic coupling dynamics,whose governing equation is established by manipulating Lagrange's equation.In addition,case studies are used to demonstrate the application of the proposed method to spacecraft dynamics.
A consistent focus in theoretical mechanics has been on how to apply Lagrange＇s equation to continuum mechanics. This paper uses the concept of a variational derivative and its laws of operation to investigate the derivation of Lagrange＇s equation, which is then applied to nonlinear elasto-dynamics. In accordance with the work-energy principle and the energy conservation law, kinetic and potential energies are proposed for rigid-elastic coupling dynamics, whose governing equation is established by manipulating Lagrange＇s equation. In addition, case studies are used to demonstrate the application of the proposed method to spacecraft dynamics.
基金
supported by the National Natural Science Foundation of China(Grant No.10272034)
