采用基础激励下力反作用的大挠性结构动力学建模研究

Dynamic Modeling of Large Flexible Structures with Force Feedback under Basic Excitation

以中心刚体和挠性梁为例,针对缺乏占质量和惯量强势成分中心刚体的刚柔耦合系统进行动力学建模研究.建立了基于基础激励输入和力反作用输出的离散动力学模型,以仿真计算对本文提出的模型进行验证,仿真结果表明,建立的模型解释了动力学刚化现象产生的原因并计算出不同转速下的系统频率,能够准确地解释刚柔耦合系统的动力刚化现象.同时考虑了中心刚体的运动,发现刚体质量和惯量对系统机动后姿态角振动频率有影响.

Taking the central rigid body and flexible beam as examples,the dynamic modeling of the rigid-flexible coupling system lacking a strong component of mass and inertia is studied in this paper.The simulation results show that the established model can explain the cause of the dynamic stiffening phenomenon and calculate the system frequency at different rotating speeds,which can accurately explain the dynamic stiffening phenomenon of the rigid-flexible coupling system.At the same time,considering the translational motion of the central rigid body,the influence of the mass and inertia of the rigid body on the attitude angular vibration frequency of the system after maneuvering is obtained.