Development Of Calculation Software For Aviation Gear Fatigue Strength And Parametric Modeling Technology

Aerial gear transmission is an essential part of aerial transmission system, the chief feature of aerial gear transmission is high speed、 heavy load, light weight and so on, comparing with the traditional gear design, the critical target of aerial gear transmission design is to reduces the volume, reduces the weight, extend life, Enhance reliability. The harsh working condition set a higher request to the security of structure work. The computation of aerial gear fatigue strength is especially important. The system does computation of the traditional fatigue strength, takes the aerial standard and the national standard as guidelines calculating for the strength checking.Parametric design technology is the important technologies in subsequent development of CAD. The parameterized design is a whole process from the analyses of function to the creation of parameterized models.The parametric design technology is favor of establishment and management of products and it can improve design efficiency of products. The product feature model established by Feature Modeling technology describes the product from the each stage in life, and provides whole information of the product. We can modify the plan of design so that it can meet project.VC++is the most widely used high-level language in China’s, and is a powerful tool for software development.This paper is on the foundation for the working principle special understanding of gear use Visual C++carry out calculation for the gear in fatigue strength. And using UG special field software, have realized parametric modeling of gear, drawing geometrical shape of the gear accurately, especially accurate to draw root of tooth transition curve of the gear.This paper passes through complete fatigue strength calculation of gear, parameter drawing, has shortened the design period of gear greatly, has reduced the cost of R&D of gear, this has positive help for the R&D of gear.