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CSME 2018/02
Volume 39 No.1
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81-98
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Multi-objective Optimal Design for Carrier and Torque Frame Assembled Together in Planetary Gear Train of GTF by Integrated DOE, RSM and LSGRG
Chao Liua and Zong-De Fanga
aSchool of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China, 710072.
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Abstract:
An approach of multi objective optimal design for carrier and tor que frame assembled together in planetary gear system of Geared Turbo F an ( GTF) is proposed in this paper. First, a program package is developed as parameterized model in Python language, the main function of which is to achieve automatic invoking of complete FEA during optimization. Therefore , development cycle of the product is reduced greatly . Second, significant factors are selected based on design of experiment ( DOE) respectively for maximum von Mises stress of the frame and maximum displacement of the holes on the carrier. Third, sampling values of the two responses are obtained by central composite f ace centered ( CCF) design . Next , approximate quadratic polynomial s are found through response surface method ( RSM) to express the two objective function s explicitly. Finally, the Pareto efficient solution of three optimization objectives (total mass and the two) is acquired via large scale generalized r educed gradient ( LSGRG) algorithm The simulation results show that the relative error of each response is less than 5%, which indicates that the model proposed is quite correct. Furthermore , the comparison also reveal s that the approach integrated DOE, RSM and LSGRG to determine the most favorable configuration of the assembly is appropriate and effective.
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Keywords: multi-objective structural optimization, parameterized finite element model, planetary gear transmission system, geared turbo fan, design of experiment, response surface method.
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*Corresponding author; e-mail: fauto@nwpu.edu.cn
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©
2018
CSME , ISSN 0257-9731
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