Three-dimensional solid element models often with a great number of degrees-of-freedom (DOFs) are now widely used for rotor dynamic analysis. While without reduction, it will cost considerable calculating resources and time to solve the equations of motion, especially when Monte Carlo simulation (MCS) is needed for stochastic analysis. To improve the analysis efficiency, the DOFs are partly reduced to modal spaces, and the stochastic results (critical speeds or unbalance response) are expanded to polynomial spaces. First, a reduced rotor model is got by component mode synthesis (CMS), and the stochastic results are expanded by polynomial chaos basis with unknown coefficients. Then, the reduced rotor model is used to calculate the sample results to obtain the coefficients. At last, the expressions of the result by polynomial chaos basis are used as surrogate models for MCS. An aero-engine rotor system with uncertain parameters is analyzed. The accuracy of the method is validated by direct MCS, and the high efficiency makes it possible for stochastic dynamic analysis of complex engine rotor systems modeled by 3D solid element.
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May 2017
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A Method for Dynamic Analysis of Three-Dimensional Solid Element Rotors With Uncertain Parameters
Yanfei Zuo,
Yanfei Zuo
College of Mechanical and Electrical Engineering,
Beijing University of Chemical Technology,
Beijing 100029, China;
Beijing University of Chemical Technology,
Beijing 100029, China;
School of Power and Energy Engineering,
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: zuo_yanfei@163.com
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: zuo_yanfei@163.com
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Jianjun Wang
Jianjun Wang
School of Power and Energy Engineering,
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: wangjianjun@buaa.edu.cn
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: wangjianjun@buaa.edu.cn
Search for other works by this author on:
Yanfei Zuo
College of Mechanical and Electrical Engineering,
Beijing University of Chemical Technology,
Beijing 100029, China;
Beijing University of Chemical Technology,
Beijing 100029, China;
School of Power and Energy Engineering,
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: zuo_yanfei@163.com
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: zuo_yanfei@163.com
Jianjun Wang
School of Power and Energy Engineering,
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: wangjianjun@buaa.edu.cn
Beijing University of Aeronautics and Astronautics,
Beijing 100191, China
e-mail: wangjianjun@buaa.edu.cn
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received August 29, 2015; final manuscript received October 5, 2016; published online December 1, 2016. Assoc. Editor: Jerzy T. Sawicki.
J. Eng. Gas Turbines Power. May 2017, 139(5): 054501 (4 pages)
Published Online: December 1, 2016
Article history
Received:
August 29, 2015
Revised:
October 5, 2016
Citation
Zuo, Y., and Wang, J. (December 1, 2016). "A Method for Dynamic Analysis of Three-Dimensional Solid Element Rotors With Uncertain Parameters." ASME. J. Eng. Gas Turbines Power. May 2017; 139(5): 054501. https://doi.org/10.1115/1.4035049
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