依据 Kane方程 ,提出带有多个柔性矩形板的复杂航天器的动力学建模方法。该方法是依据 3个假设条件得到的。通过引入矩形板在中面内不可伸展的假设 ,并在适当的阶段进行线性化处理 ,可在动力学方程中自然地引入“动力刚化”项。数值仿真的结果为航天器的设计提供了重要的理论依据。本方法也可推广到其它多柔体系统 Based on the Kane equation, a dynamic modeling method of complex spacecraft with multiple flexible rectangular plates is proposed. The method is based on three assumptions. By introducing the assumption that the rectangular plates are inextensible in the midplane and linearizing them at appropriate stages, the term “dynamic stiffening” can naturally be introduced into the kinetic equations. The numerical simulation results provide an important theoretical basis for the design of spacecraft. This method can also be extended to other flexible systems