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个人信息Personal Information
教授
招生学科专业:
动力工程及工程热物理 -- 【招收博士、硕士研究生】 -- 能源与动力学院
航空宇航科学与技术 -- 【招收博士、硕士研究生】 -- 能源与动力学院
机械 -- 【招收硕士研究生】 -- 能源与动力学院
能源动力 -- 【招收博士、硕士研究生】 -- 能源与动力学院
毕业院校:东南大学
学历:东南大学
学位:工学博士学位
所在单位:能源与动力学院
办公地点:御道街29号
联系方式:c.zang@nuaa.edu.cn
电子邮箱:
Analysis of nonlinear modal damping due to friction at blade roots using high-fidelity modelling
点击次数:
所属单位:能源与动力学院
发表刊物:Proc. ASME Turbo Expo
摘要:In this paper, a methodology is developed for analysis of modal damping in root joints of bladed discs using large finite element models and detailed description of friction contacts at contact interfaces of the joints. The methods allows the analysis of: (i) a single blade vibration and (ii) a bladed-disc assembly for any family of modes (lower and higher modes) calculating the modal damping factors for different levels of vibrations. Three-dimension solid finite element models are used in the calculations. The analysis is performed in time domain through the transient dynamics analysis. The methodology allows the use of widely available finite element packages and based on the direct calculation of the energy dissipated at root joints due to micro-slip over the multitude of contact elements modelling the surface-to-surface friction contact interactions. The numerical studies of the dependency of modal damping factors on the vibration amplitudes are performed for simplified and realistic bladed disc models for different blade mode shapes, engine-order excitation numbers and nodal diameter numbers using high-fidelity models. Copyright © 2018 ASME.
是否译文:否
发表时间:2018-01-01
合写作者:Chen, Junjie,周标,Petrov, E.P.
通讯作者:臧朝平