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1. (WO2018086160) ROUGH SURFACE-BASED THREE-DIMENSIONAL CONTACT STIFFNESS CALCULATION METHOD FOR SPUR GEAR

Pub. No.:    WO/2018/086160    International Application No.:    PCT/CN2016/107233
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Sat Nov 26 00:59:59 CET 2016
IPC: G06F 17/50
Applicants: BEIJING UNIVERSITY OF TECHNOLOGY
北京工业大学
Inventors: LIU, Zhifeng
刘志峰
ZHANG, Tao
张涛
ZHAO, Yongsheng
赵永胜
BI, Shuxin
毕舒心
Title: ROUGH SURFACE-BASED THREE-DIMENSIONAL CONTACT STIFFNESS CALCULATION METHOD FOR SPUR GEAR
Abstract:
A rough surface-based three-dimensional contact stiffness calculation method for a spur gear. The method comprises: carrying out hexa meshing under the requirement that all square meshes on a tooth surface are equal in area; calculating contact pressure distribution of a smooth tooth surface on the basis of a finite element method, and extracting the pressure of a node in a contact region; calculating normal contact stiffness and tangential contact stiffness of a single square mesh on the basis of a fractal theory; and calculating the contact stiffness of the tooth surface. The method further improves the precision of a gear contact stiffness calculation model, overcomes the defect of smooth contact based on a Hertz theory in a previous calculation process, and reveals the influence rule of a roughness parameter on a stiffness characteristic of a gear in the process of contact of rough tooth surfaces and a calculation method. Moreover, the finite element-based three-dimensional contact stiffness calculation model is more accurate than a previous two-dimensional calculation model or calculation formula. In addition, the influence of errors in actual assembling and manufacturing processes of a gear is considered, so that the contact stiffness of the gear is more accurate, and a foundation is laid for dynamics analysis of the gear.