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Hybrid Simulation of Powertrain System Based on the Combination of Test Model and FE Analysis

MA Bing-jie;FENG Hui-hua;SHEN Jian-ping

2011, 31 (6): 57-61. DOI: 10.3969/j.issn.1006-1355-2011.06.013

Abstract （1496）

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In order to realize high efficiency and high precision dynamic analysis for complex structures, the method of hybrid simulation with the combination of test mode analysis and finite element analysis is brought forward based on the idea of substructures. This method is realized in the Virtual Lab platform. Taking the vibration modes of a whole diesel engine resulted from experiments and the vibration modes of a gearbox resulted from the finite element analysis as examples, the hybrid simulation method is verified. With this method, a dynamic simulation of a powertrain system is done. It is found that the results of the hybrid simulation of the whole powertrain model are essentially the same as those from the finite element analysis, but this method consumes much less computer time. Thus, the hybrid simulation method is accurate and effective.

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Study on Gearbox Vibration Performance Based on Statistical Energy Analysis

FENG Hui-hua;ZHAO Zhi-fang;LU Shou-wei;ZUO Zheng-xing

2011, 31 (5): 86-89. DOI: 10.3969/j.issn.1006-1355-2011.05.020

Abstract （1892）

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The statistical energy analysis (SEA) is applied to analyze the high frequency vibration characteristics of a gearbox. Number of modals of the gearbox is acquired by the Finite Element Analysis in the 1/3 octave frequency domain to define the suitable frequency range for SEA. The equivalent masses of two subsystems of gearbox are acquired by experimental measurement. The internal loss factors and coupling loss factors of the two subsystems are measured by the modified power injection method. The SEA model of the gearbox is established in software VAONE using the measured SEA parameters, and then the vibration response of random force excitation is calculated. Since the simulation solution and measured results agree well, the validity of the measurement method and the effectiveness of analysis of vibration response using SEA is proved. The vibration response of the gearbox under operation condition is analyzed using the gearbox SEA modal established in previous work. The results show that SEA method can analyze the vibration response of complex structure effectively.