Research On Parametric Model And Dynamic Performance Of Gear Transmission System Of Aircraft Engine

Since the gear transmission systems having a constant power transmission characteristicsand therefore has other transmission systems irreplaceable advantages, the high-quality,high-performance study on gears is a major common key technical issues of the field ofaviation, aerospace and engineering mechanical transmission system in China. Gear drivesystem working condition is very complex, not only due to the load conditions and thediversification of the power plant, there will be the external excitation caused by prime moverand the load, but also will appear internal incentive caused by the time-varying mesh stiffness,gear transmission error and tooth side gap. Because the gear transmission systems are widelyused in aviation, aerospace, automotive and other fields, in order to meet its high-speed,heavy-duty, lightweight and high reliability requirements, need in-depth study of its dynamiccharacteristics. In this paper, taking a certain aero engine accessory gear transmission systemas the object of study, through the dynamic simulation of the gear meshing force，gained timedomain, frequency domain curve, analyzed by finite element method, the natural frequency ofgear vibration mode, thus predicting the vibration of gear system.Based on the three-dimensional modeling software UG, using its parametric modelingfunctions and drew three-dimensional parametric models of gear system. Calculate thedynamic meshing force of gears for the assembled gear transmission system use of dynamicsimulation software ADAMS. Get the time domain, frequency domain curve of gear meshingforce in different conditions and to make a more comprehensive forecast to the geartransmission dynamics.Analyzed the gear dynamic modality using ANSYS analysis software, got the naturalfrequencies, the main mode of vibration and the amount of deformation of gear, and provideda reliable basis for resonance analysis of the gear.Analyzed the gear simple harmonic responseusing ANSYS, obtained the time displacement curve of the gear in the working conditionsunder the X, Y, Z direction (radial, circumferential, axial direction), and provided basis for periodic response analysis and steady-state response analysis0f the structural. Also laid thefoundation for researching the dynamic nature of gear transmission, improve institutional andoptimum structural design.