组数与组间刚度对成组叶盘振动局部化的影响

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组数和组间刚度是影响成组叶盘振动特性的两个重要结构参数。本文基于成组叶盘的集中参数模型,推导了成组叶盘的振动方程,计算得到了不同组数和组间刚度下失谐成组叶盘的振动响应局部化因子,分析了组数和组间刚度对失谐成组叶盘的振动响应局部化的影响规律。结果表明：在叶片总数一定的情况下,随着叶片组数的减少,失谐成组叶盘的局部化程度明显降低;而随着组间刚度的增大,失谐成组叶盘的局部化程度先增大后减小,最终保持在相对稳定状态。研究结果可以为成组叶盘的优化设计提供一定的理论支持。 Group number and group coupling stiffness are two important structural parameters of grouped blade disk. Based on the lumped parameter model, the vibration equation of grouped blade disk was derived. The vibration response localization factor of mistuned grouped blade disk was cal- culated for different group number and group coupling stiffness. The effect of the group number and group coupling stiffness on localization was analyzed. The results show that when the sum of blades is certain, the reduction of group number can significantly reduce the level of localization. With the in- creasing of group coupling stiffness, the localization increases first and then decreases, and remains relatively stable state finally. The results can serve for the optimization design of the grouped blade disk