1 Putting forword the question and its calculating method The lubrication of involute spur gear transmission is the typical one of transient EHL line contact problem. It can't be described only with famous Dowson-...1 Putting forword the question and its calculating method The lubrication of involute spur gear transmission is the typical one of transient EHL line contact problem. It can't be described only with famous Dowson-Higginson equation, but it is a very complicated partial difference equation. So far, no any complete discussion has been seen at home and abroad, and it is a forward problem at this field in internation. So there is a number of deepgoing and much-needed work to do. It is correspondence with practical lubrication condition to explore the展开更多
To complete the contact fatigue reliability analysis of spur gear under elastohydrodynamic lubrication(EHL) efficiently and accurately, an intelligent method is proposed. Oil film pressure is approximated using quadra...To complete the contact fatigue reliability analysis of spur gear under elastohydrodynamic lubrication(EHL) efficiently and accurately, an intelligent method is proposed. Oil film pressure is approximated using quadratic polynomial with intercrossing term and then mapped into the Hertz contact zone. Considering the randomness of the EHL, material properties and fatigue strength correction factors, the probabilistic reliability analysis model is established using artificial neural network(ANN). Genetic algorithm(GA) is employed to search the minimum reliability index and the design point by introducing an adjusting factor in penalty function. Reliability sensitivity analysis is completed based on the advanced first order second moment(AFOSM). Numerical example shows that the established probabilistic reliability analysis model could correctly reflect the effect of EHL on contact fatigue of spur gear, and the proposed intelligent method has an excellent global search capability as well as a highly efficient computing performance compared with the traditional Monte Carlo method(MCM).展开更多
文摘1 Putting forword the question and its calculating method The lubrication of involute spur gear transmission is the typical one of transient EHL line contact problem. It can't be described only with famous Dowson-Higginson equation, but it is a very complicated partial difference equation. So far, no any complete discussion has been seen at home and abroad, and it is a forward problem at this field in internation. So there is a number of deepgoing and much-needed work to do. It is correspondence with practical lubrication condition to explore the
基金Project(CX2014B060) supported by Hunan Provincial Innovation for Postgraduate,ChinaProject(8130208) supported by General Armament Pre-research Foundation
文摘To complete the contact fatigue reliability analysis of spur gear under elastohydrodynamic lubrication(EHL) efficiently and accurately, an intelligent method is proposed. Oil film pressure is approximated using quadratic polynomial with intercrossing term and then mapped into the Hertz contact zone. Considering the randomness of the EHL, material properties and fatigue strength correction factors, the probabilistic reliability analysis model is established using artificial neural network(ANN). Genetic algorithm(GA) is employed to search the minimum reliability index and the design point by introducing an adjusting factor in penalty function. Reliability sensitivity analysis is completed based on the advanced first order second moment(AFOSM). Numerical example shows that the established probabilistic reliability analysis model could correctly reflect the effect of EHL on contact fatigue of spur gear, and the proposed intelligent method has an excellent global search capability as well as a highly efficient computing performance compared with the traditional Monte Carlo method(MCM).
