| Reliability Copula Model for Wind Turbine Gearbox Based on Failure Correlation |
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| 作者姓名： | 安宗文 张宇 汪忠来 |
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| 作者单位： | School of Mechatronics Engineering, Lanzhou University of Technology;School of Mechatronics Engineering, University of Electronic Science and Technology of China |
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| 摘 要： | On the basis of each gear’s failure correlation, the reliability Copula model of a wind turbine gearbox is established and a 1.5 MW wind turbine gearbox is taken as the research object. Firstly, based on the dynamic reliability model of mechanical parts, each gear’s life distribution function of a wind turbine gearbox is obtained.The life distribution function can be used as the marginal distributions of the system’s joint distribution. Secondly,Copula function is introduced to describe the failure correlation between parts, and the appropriate Copula function is selected according to the shape characters of Copula probability density function. Finally, the wind turbine gearbox system is divided into three parts according to the failure correlation of each gear. The Sklar theorem and the thought of step by step analysis are used to obtain the reliability Copula model for a wind turbine gearbox based on failure correlation.
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| 关 键 词： | Copula Archimedean marginal turbine Correlation histogram Turbine planetary characters choose |
Reliability Copula Model for Wind Turbine Gearbox Based on Failure Correlation |
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| AN Zong-wen
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ZHANG Yu
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WANG Zhong-lai.Reliability Copula Model for Wind Turbine Gearbox Based on Failure Correlation[J].Journal of Shanghai Jiaotong university,2015,20(3):312-316. |
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| Authors: | AN Zong-wen ZHANG Yu WANG Zhong-lai |
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| Institution: | 1. School of Mechatronics Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2. School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | On the basis of each gear's failure correlation, the reliability Copula model of a wind turbine gearbox is established and a 1.5 MW wind turbine gearbox is taken as the research object. Firstly, based on the dynamic reliability model of mechanical parts, each gear's life distribution function of a wind turbine gearbox is obtained.The life distribution function can be used as the marginal distributions of the system's joint distribution. Secondly,Copula function is introduced to describe the failure correlation between parts, and the appropriate Copula function is selected according to the shape characters of Copula probability density function. Finally, the wind turbine gearbox system is divided into three parts according to the failure correlation of each gear. The Sklar theorem and the thought of step by step analysis are used to obtain the reliability Copula model for a wind turbine gearbox based on failure correlation. |
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| Keywords: | wind turbine gearbox gear failure correlation Copula function reliability model |
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