Vibration analysis characteristics of a pre-twisted tenon jointed blade with under-platform dampers in a thermal environment

• Haoyan Zhang ^[1] ; Chaofeng Li ^[1] ; Tichang Jia ^[1]
  1. [1] School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 52, Nº. 7, 2024, págs. 4667-4688
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • This study proposes a method to study blades with multiple friction interfaces, to reveal the coupling effect of multi-interface blades on nonlinear vibrations. The dynamics of a pre-twisted tenon jointed blade with under-platform dampers in a thermal environment is modeled, considering the combined effects of thermal effects and nonlinear loads. Subsequently, a friction model of the tenon and under-platform dampers contact interface is developed. While studying the coupling effect of multiple friction interface, the effects of natural frequency, temperature, rotational speed and pre-twisted angle on blade vibration characteristics and nonlinear characteristics are analyzed.