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Gears are used in different industries from machine and equipments manufacturing to automotive industry, from energy industry such as steam and hydraulic turbines, wind turbines to aeronautics such as helicopter and aero plane industries. There is an increasing demand for gears which work at high speeds and carry high loads, so there is more need for gear research and development activities on gear...
According to the structure of the newly high precision F2C-T pin-cycloid transmission, influence factors on the transmission error were analyzed, and the error synthesis model of the various driving factors and parts were established. Taking the F2C-T455 model as an example, the theory of transmission error were analyzed, comparing contribution rate by driving factors of each part, the main influence...
Aircraft engine starting is usually defined as the operating range between zero and engine idle speed. A high-fidelity model of this process can be used not only for analysis and optimization of the start-up process, but also to reduce huge costs of rig test. In this paper a component level model of the process is developed using component characteristics extrapolation method to solve the key problem...
In order to analysis the flight performance of a compound helicopter, this research presents a numerical method to assess the flight total power and power transmission efficiency of the helicopter. This method combines the models of aerodynamics and the mechanical transmission loss to obtain a comprehensive evaluation. Moreover, this study performs experiments to simulate the transition flight mode...
This paper presents a model for maximizing the critical speed of a composite drive shaft without the penalty of increasing the total structural mass. Additional constraints include stress, torsional buckling as well as side constraints. The selected design variables are the fiber volume fraction distribution, fiber orientation angle and wall thickness of the shaft. Both continuous and discrete grading...
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