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tree attachment中文是什么意思

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  • Different vibration characteristics between the two models are discussed . geometry mismatch in a turbine blade root , which arose in manufacturing process or caused by wearing out during service , leads to contact conditions changed in fir - tree attachments
    汽轮机叶根制造尺寸误差或运行磨损造成的尺寸改变会导致叶根与轮盘接触状态变化,进而引起叶片固有频率发生漂移,并有可能接近共振频率而导致叶片事故。
  • As a result , shifting of the fundamental frequencies and redistribution of stress in the blade base possibly cause failure of the blade . a three - dimensional finite element model of a blade and its fir - tree attachments have been constructed and analyzed with taking into account of contact nonlinearity in the attachments and large deformation effect of the blade . the geometry mismatch was introduced into the finite element model by defining gaps between two contact surfaces in the attachments
    分析结果表明叶根误差发生的位置对叶片弯曲振型的固有频率影响较大,对扭转振型影响较小;误差的大小对叶片各阶固有频率影响均较小,但对叶根应力分布有影响;比较发现,在计算固有频率时,将叶片在叶根处简单地处理成固支位移边界是不合理的。
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Last modified time:Tue, 19 Aug 2025 00:29:56 GMT

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