中文摘要：

切削颤振是制约机械产品高效、高精度加工的主要问题之一。为此,研制基于智能材料——磁流变液的减振车刀,以利用智能材料良好的机电耦合特性对切削颤振进行有效地抑制。研究表明,磁流变减振装置具有迟滞非线性特性,建立准确的减振车刀力学模型对有效实施切削颤振控制至关重要。搭建了稳态激振试验平台,通过稳态激振试验,探究不同励磁电流、激振频率下磁流变减振车刀的力——位移迟滞曲线变化规律,运用非线性迟滞理论,结合数据分解与参数识别得到不同外界激励下非线性弹性力、阻尼参数、迟滞环节的刚度及迟滞力。对磁流变减振车刀非线性迟滞模型进行了参数辨识,为后期利用该减振车刀进行颤振控制奠定了基础。

英文摘要：

Cutting chatter is one of the major problems which constraints the high-performance and high-precision of the machining products. A damping lathe tool based on intelligent material — magnetorheological fluid was developed in order to effectively suppress cutting chatter by using excellent mechanical-electrical coupling characteristics of smart material. The investigations show that hysteresis nonlinearity is a characteristic of magnetorheological vibration damping device. So,an accurate mechanics model of damping lathe tool is essential to implement cutting chatter control effectively. A steady-state vibration testing platform was established in the paper. Through steady-state vibration experiment,force—displacement hysteresis curves have been explored under different excitation current and vibration frequency. Based on the theory of nonlinear hysteresis and combined with the data decomposition and parameter identification,the nonlinear elastic force、damping parameter、the hysteresis stiffness and hysteretic restoration force are calculated. It lays a theoretical foundation for chatter control with the damping lathe tool later.