Computational Studies of the Unbalance Response of a Whole Aero-Engine Model With Squeeze-Film Bearings
Computational Studies of the Unbalance Response of a Whole Aero-Engine Model With Squeeze-Film Bearings
复制标题
挤压油膜轴承航空发动机整体模型不平衡响应的计算研究
DOI：
10.1115/1.3159381
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Bonello P
中科院分区：
文献类型：
--
作者：
Bonello P
在计算装有非线性轴承的航空发动机总成的不平衡振动响应时，需要保留大量的振型才能得到可靠的结果。这使得以前提出的大多数非线性解算器不适合此应用程序。本文提出了三种有效解决该问题的方法。第一种方法是最近发展起来的脉冲接受法(IRM)。第二种方法是纽马克-贝塔方法的重新表述。除了这两种时域方法外，还引入了一种全发动机导纳谐波平衡法(RHBM)，首次实现了对实际发动机周期振动响应的频域计算。这三种方法都使用通过对发动机零速时的线性部分进行一次性分析而计算出的模态数据。对一个实际尺寸的具有挤压油膜阻尼器轴承的典型双轴发动机模型的仿真表明，流行的Newmark-beta方法对于高阶非线性系统是不可靠的。IRM和RHBM结果之间的良好相关性证明了这两个互补工具在现实的全发动机模型计算分析中的有效性。
The computation of the unbalance vibration response of aero-engine assemblies fitted with nonlinear bearings requires the retention of a very large number of modes for reliable results. This renders most previously proposed nonlinear solvers unsuitable for this application. This paper presents three methods for the efficient solution of the problem. The first method is the recently developed impulsive receptance method (IRM). The second method is a reformulation of the Newmark-beta method. In addition to these two time-domain methods, a whole-engine receptance harmonic balance method (RHBM) is introduced that allows, for the first time, the frequency domain calculation of the periodic vibration response of a real engine. All three methods use modal data calculated from a one-off analysis of the linear part of the engine at zero speed. Simulations on a realistically-sized representative twin-spool engine model with squeeze-film damper bearings provide evidence that the popular Newmark-beta method can be unreliable for large-order nonlinear systems. The excellent correlation between the IRM and RHBM results demonstrates the efficacy of these two complementary tools in the computational analysis of realistic whole-engine models.
密封挤压油膜轴承的阻尼能力
DOI：
--
发表时间：
1985
期刊：
影响因子：
--
作者：
M. Dede;M. Dogan;R. Holmes
通讯作者：
R. Holmes
影响因子：
4.7
作者：
P. Bonello;P. M. Hai
通讯作者：
P. Bonello;P. M. Hai
非线性转子轴承系统的瞬态模态分析
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
R. Armentrout;E. J. Gunter
通讯作者：
E. J. Gunter