Research on finite element modeling of gearbox bolted joint surface

LI Zhi-zhong，ZHAO Zhen-yu

（Hangzhou Advance Gearbox Group Liminted by Share Ltd., Hangzhou 311203，China）

Abstract：Aiming at how to effectively use ANSYS software to carry out FEM analysis of gearbox bolt connections in practical engineering applications，the difficulty and key points in fields of simulation of bolt pre-tightening force，bolt contacting faces and finite elements of physical bolts were studied，seven typical methods of building FE model for gearbox bolt connections based on ANSYS were illustrated systematically，of which 4 kinds of typical FE model，static analysis and modal analysis were researched by using ANSYS，the differential results between static and dynamic aspects of different modeling methods were summarized. The results indicate that，the coupling bolt model is a more appropriate modeling method in a view of simulation efficiency and accuracy，but in practical structure，applying FE model of physical bolts to simulate bolts is an effective modeling way for gearbox bolt connections，which can better reflecting stress change in bolted mechanism during practical works，can be considered the preferred scheme in various modeling methods.