A method of equivalent stiffness identification for bearing joint of gearbox based on CAE/CAT/CAO

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (23) : 81-86.

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A method of equivalent stiffness identification for bearing joint of gearbox based on CAE/CAT/CAO

LOU Jiang-lei TANG Jin-yuan

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Abstract

Based on the CAE/CAT/CAO technology, a method to identify the bearing stiffness of gearbox was proposed, with the combination of finite element modal analysis, experimental modal analysis and Integrated optimization by Isight:1)The finite element analysis modal of gearbox was built by the finite element analysis software of Abaqus, and a spring element was used to simulate the three-dimensional equivalent stiffness of bearing, as well as a design variable; 2) The natural frequencies and vibration modes, containing information of bearing joint interfaces, were acquired by the experimental modal analysis of gearbox, with the LMS modal test and analysis system, and the test frequencies were set as the optimization target;3) The results of finite element modal analysis and experimental modal analysis were in consistent by optimization of the bearing stiffness through the Abaqus integrated by Isight. Analysis results showed that the proposed method consider the flexibility of gear shaft and gear box, had high precision, and there is a good agreement between the finite element model of gearbox after optimization and the test model for the dynamic property.

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gearbox / bearing stiffness / Finite element modal analysis / Experimental modal analysis / CAE/CAT/CAO

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LOU Jiang-lei TANG Jin-yuan . A method of equivalent stiffness identification for bearing joint of gearbox based on CAE/CAT/CAO [J]. Journal of Vibration and Shock, 2014, 33(23): 81-86