A theoretical and experimental investigation of the dynamic response of a squeeze-film damped twin-shaft test rig
A theoretical and experimental investigation of the dynamic response of a squeeze-film damped twin-shaft test rig
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DOI：
10.1177/0954406213484223
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
P. Bonello;H. Pham
中科院分区：
文献类型：
--
作者：
P. Bonello;H. Pham
本文对一个双轴试验台进行了理论和实验分析，其中两个不平衡转子通过灵活安装的挤压膜阻尼轴承的外壳非线性耦合，就像在一个真实的飞机发动机中一样。研究目的有两个方面：验证最近开发的快速计算方法，并深入了解转子转速之间的比率对整体振动响应的影响。实验数据与理论分析相吻合。当速比等于一个大整数的比率（以其最简化的形式）时，这种相关性是最好的。当速比为两个小整数之比时，预测响应对转子间任意初始相位角特别敏感。
This article performs a theoretical and experimental analysis of a twin-shaft test rig in which the two unbalanced rotors are nonlinearly coupled through the flexibly mounted housing of a squeeze-film damper bearing, as in a real aircraft engine. The research aims are two-fold: to validate recently developed fast computation methods and to achieve an insight into the effect of the ratio between the rotor speeds on the overall vibration response. The experimental data correlated reasonably well with the theoretical analysis. The correlation was best when the speed ratio was equal to a ratio of large integers (in its most reduced form). When the speed ratio was a ratio of two low integers, the predicted response was found to be particularly sensitive to the arbitrary initial phase angle between the rotors.