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<p>This paper introduces a cam-roller nonlinear energy sink (CRNES) with customized nonlinear forces for torsional vibration suppression in long-shafting rotor system. The CRNES combines elastic beams and cam-roller mechanisms to generate nonlinear stiffness, where cam profile customization enables tailored nonlinear forces. A dynamic model of the rotor-CRNES system is established. The cam profile of the CRNES is determined through numerical analysis combined with optimization strategies, and vibration suppression performance and mechanism of CRNES are analyzed. Parameter analysis is conducted and compared with linear dynamic vibration absorber (LDVA) to demonstrate the superiority of CRNES. Experimental validation under steady-state excitation confirms a 72.96% reduction in peak torsional vibration and a transient vibration dissipation rate 2.5 times faster than system without CRNES. Results highlight the CRNES’s effectiveness in suppressing torsional vibrations in long-shafting rotor system.</p>

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A novel customizing nonlinear force cam-roller nonlinear energy sink for torsional vibration suppression

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Zhengqiu Xie,
  • Kun Xie,
  • Shuaishuai Ge,
  • Zhigang Zhang,
  • Ziqian Liu,
  • Wenbin Huang

摘要

This paper introduces a cam-roller nonlinear energy sink (CRNES) with customized nonlinear forces for torsional vibration suppression in long-shafting rotor system. The CRNES combines elastic beams and cam-roller mechanisms to generate nonlinear stiffness, where cam profile customization enables tailored nonlinear forces. A dynamic model of the rotor-CRNES system is established. The cam profile of the CRNES is determined through numerical analysis combined with optimization strategies, and vibration suppression performance and mechanism of CRNES are analyzed. Parameter analysis is conducted and compared with linear dynamic vibration absorber (LDVA) to demonstrate the superiority of CRNES. Experimental validation under steady-state excitation confirms a 72.96% reduction in peak torsional vibration and a transient vibration dissipation rate 2.5 times faster than system without CRNES. Results highlight the CRNES’s effectiveness in suppressing torsional vibrations in long-shafting rotor system.