摘要
柔性联轴器在旋转机械系统中,不但起传递转矩的作用,而且还有减小扭转冲击的作用。柔性联轴器的刚度、阻尼特性直接影响着旋转系统的固有特性和扭转减振的效果。因此以具有非线性刚度的柔性联轴器接结的两转子系统为研究对象,通过对其在冲击力矩作用下,旋转系统非线性运动方程的建立、求解,得到了转子扭转振动响应的解析解。经过对转子角加速度随非线性刚度、阻尼、转动惯量变化规律的仿真计算,发现,在相同初始条件下, 冲击角加速度随柔性连接器硬非线性刚度的增大而增大,随柔性连接器软非线性刚度的增大而减小,随转子转动惯量和柔性联轴器阻尼的增大而减小。另外,非线性刚度使旋转系统的固有频率发生变化。
In rotating machinery system, the flexible coupling not only plays a part in transmitting the torque, but also in reducing the torsional impact. The stiffness and damping of flexible coupling affect the natural characteristics of rotating system and the efficiency of reduction of torsional vibration directly. In this paper, the nonlinear motion equations of rotating system coupled by flexible coupling with nonlinear stiffness are established under the action of impact moment. Solving the non-linear motion equations, the torsional vibration responses of rotating system are obtained. Through the numerical simulations in which rotor s angular acceleration varies with nonlinear stiffness, damping and mass moment of inertia, it is found that the impact angular acceleration increases along with the enlarging of hardening nonlinear stiffness and decreases along with the enlarging of softening nonlinear stiffness of flexible coupling, but decreases as the rotor's mass moment of inertia and damping increase. In addition, non-linear stiffness of flexible coupling can change the natural frequencies of the rotating system.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第4期6-8,13,共4页
Journal of Vibration and Shock
基金
上海市科学技术委员会资助项目(编号为04ZR14019)
关键词
柔性联轴器
非线性刚度
旋转系统
扭转振动
Computer simulation
Damping
Natural frequencies
Nonlinear systems
Rotating machinery
Stiffness
Torque
Vibrations (mechanical)
