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    Method for reducing vibration levels of a bladed wheel in a turbomachine
    1.
    发明授权
    Method for reducing vibration levels of a bladed wheel in a turbomachine 有权
    降低涡轮机叶片轮的振动水平的方法

    公开(公告)号：US08286347B2

    公开(公告)日：2012-10-16

    申请号：US12035966

    申请日：2008-02-22

    申请人： Jerome Alain Dupeux ,  Jean-Pierre Francois Lombard ,  Virendra Sharma ,  Samy Mitha

    发明人： Jerome Alain Dupeux ,  Jean-Pierre Francois Lombard ,  Virendra Sharma ,  Samy Mitha

    IPC分类号： B21K25/00 ,  B23P15/04

    CPC分类号： F01D5/142 ,  F01D5/16 ,  Y10T29/49316 ,  Y10T29/4932 ,  Y10T29/49321 ,  Y10T29/49327

    摘要： A method for reducing vibration levels in a turbomachine including at least a first and a second bladed wheel, due to aerodynamic perturbations that are produced by the second bladed wheel or an obstacle on the first bladed wheel is disclosed. The method includes: defining an initial configuration of the blades; calculating the synchronous forced response on the first bladed wheel as a function of the harmonic excitation force produced by the second bladed wheel expressed in the form of a linear function of the generalized aerodynamic force for the mode considered; determining a geometric tangential shift value θ for the stacked cross sections of one of the two wheels to reduce the corresponding term to the generalized aerodynamic force. The set of cross sections with the tangential shifts thus defines a new configuration of the blades of one of the two wheels.

    摘要翻译： 公开了一种用于减少包括至少第一和第二叶轮的涡轮机中的振动水平的方法，这是由于由第二叶轮产生的空气动力扰动或第一叶片轮上的障碍物。 该方法包括：定义刀片的初始配置; 根据所考虑的模式的广义气动力的线性函数的形式，计算第一叶片轮上的同步强制响应作为由第二叶片轮产生的谐波激励力的函数; 确定几何切向位移值＆amp; 对于两个车轮之一的堆叠横截面，将相应的术语减小到广义气动力。 因此，具有切向位移的一组横截面限定了两个轮之一的叶片的新构造。