...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Mathematical Modelling >Dynamic modelling and vibration characteristics analysis for the bolted joint with spigot in the rotor system
【24h】

Dynamic modelling and vibration characteristics analysis for the bolted joint with spigot in the rotor system

机译：转子系统中螺栓连接螺栓连接的动态建模与振动特性分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The bolted flange joints with spigot (short for bolted joints) are widely used in the rotor system of aero-engine. The current models of the bolted joint usually ignore the spigot, therefore cannot account for the effect of spigot on joint's mechanical characteristics. In this paper, a new analytical model of bolted joint is proposed to describe its nonlinearity under bending moment. The model takes into account the sticking and sliding statuses of spigot by introducing a Jenkins element, therefore is able to describe the joint's damping effectively. By performing a comparison study with the finite contact element model, the accuracy of the proposed model is validated. Meantime, the comparison study highlights the important role of spigot on the hysteresis nonlinearity of the bolted joint. After that, a dynamical model of the bolted rotor is developed, in which the proposed bolted joint model is introduced by considering the influence of rotor's whirl motion. Based on the dynamical model, the dynamic characteristics of the bolted rotor are investigated in detail. The results show that the bolted joint mainly produces stiffness loss and damping nonlinearity into the rotor system. The stiffness loss occurs in any loading conditions and leads to a decrease of the rotor's critical speed. While the damping nonlinearity is mainly excited under large unbalance, it may induce a self-excited components in rotor's response at super-critical speed. The influence of the bolted joint on rotor dynamics can be reduced by decreasing flange length, friction coefficient and interference fit of the spigot.
机译：具有套管的螺栓法兰接头（螺栓接头短路）广泛用于航空发动机的转子系统。螺栓接头的当前型号通常忽略龙头，因此不能考虑Spigot对关节机械特性的影响。本文提出了一种新的螺栓接头分析模型，以描述弯矩下的非线性。该模型考虑了通过引入Jenkins元件来考虑Spigot的粘附和滑动状态，因此能够有效地描述关节的阻尼。通过使用有限接触元件模型进行比较研究，验证了所提出的模型的准确性。与此同时，比较研究突出了套管对螺栓接头滞后非线性的重要作用。之后，开发了螺栓转子的动态模型，其中通过考虑转子的旋转运动的影响来引入所提出的螺栓连接模型。基于动力学模型，详细研究了螺栓转子的动态特性。结果表明，螺栓接头主要在转子系统中产生刚度损耗和阻尼非线性。在任何装载条件下发生刚度损失，并导致转子的临界速度的降低。虽然阻尼非线性主要在大不平衡下兴奋，但它可以在转子以超临界速度响应的自激成分。通过降低凸缘长度，摩擦系数和套管的干涉配合，可以减少螺栓接头对转子动力学的影响。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2021年第6期|306-331|共26页
  • 作者

    Pingchao Yu; Lunxu Li; Guo Chen; Mohan Yang;

  • 作者单位

    College of Civil Aviation Nanjing University of Aeronautics and Astronautics Nanjing 211106 PR China;

    College of Civil Aviation Nanjing University of Aeronautics and Astronautics Nanjing 211106 PR China;

    College of Civil Aviation Nanjing University of Aeronautics and Astronautics Nanjing 211106 PR China;

    College of Civil Aviation Nanjing University of Aeronautics and Astronautics Nanjing 211106 PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bolted joint; Spigot structure; Stiffness loss; Damping nonlinearity; Self-excited vibration;

    机译：螺栓连接;龙头结构;僵硬损失;阻尼非线性;自我激动的振动;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号