【摘要】 通过对延伸锥及作动筒的运动分析和受力分析，建立了双级延伸喷管的等效力学模型，即等效力和等效质量，这样就可以将一复杂机构的动力学问题转化为一个等效构件的动力学问题，使其能模拟原机构的力学特性，从而使问题简化和便于计算。更多还原

【Abstract】 In order to simplify the kinematics of double extendible nozzle and make it easy to calculate,its equivalent mechanic model is established with equivalent forces and masses by means of loading and kinematic analyses of its actuators and extendible cone.Then the kinematics of the complex mechanism is turned into that of equivalent components and its mechanic characteristics can be simulated and calculated.更多还原