The Universal Equation of Variable Mass Flexible Body Dynamics (I)

In the present paper,the dynamic problem of flexible body with variable mass is put forward in two ways,and the dynamic equations of flexibke body is given in allusion to the first way.Geometric description of flexible body with variable mass is carried out before establishment of the universal bynamic equations of flexible body with variable mass.Conservation laws,including mass conservation law,and conservation law of linear and angular momentum,of flexible body with variable mass are obtained on the base of Jourdains variational principle.