Optimization design of joint bearing structural parameters based on orthogonal experimental method
基于正交试验法的关节轴承结构参数优化设计

摘要

以应用在飞机起落架上冲击载荷较大的关节轴承为研究对象，利用ABAQUS软件建立了带有油槽和油孔关节轴承的仿真模型，通过正交试验分析了外圈油孔油槽个数、内圈油孔油槽个数以及油孔直径3个因素下对内外圈最大接触应力的影响。结果表明：影响内外圈最大接触应力的因素主次顺序分别为内圈油孔油槽个数＞外圈油孔油槽个数＞油孔直径；以内外圈最大接触应力最小为目标，得出最佳的结构参数为内圈油孔油槽个数6个、外圈油孔油槽个数为6个、油孔直径为3mm；由最佳的结构参数可知，最大接触应力区域主要集中在外圈端面和内圈内球面油槽的两侧，内圈外球面和外圈内球面在油孔附近有应力集中。

Abstract

Focusing on joint bearings subjected to high impact loads in aircraft landing gear, a simulation model of joint bearings with oil grooves and oil holes was established using ABAQUS software. Through an orthogonal test, the effects of three factors—the number of oil grooves and oil holes on the outer ring, the number of oil grooves and oil holes on the inner ring, and the diameter of the oil holes—on the maximum contact stress of the inner and outer rings were analyzed. The results show that the factors affecting the maximum contact stress of the inner and outer rings are ranked as follows: number of oil grooves and holes on the inner ring > number of oil grooves and holes on the outer ring > oil hole diameter. With the goal of minimizing the maximum contact stress of the inner and outer rings, the optimal structural parameters were determined to be: 6 oil grooves and holes on the inner ring, 6 on the outer ring, and an oil hole diameter of 3 mm. Based on the optimal structural parameters, it was found that the regions of maximum contact stress are mainly concentrated on the end face of the outer ring and on both sides of the oil grooves of the inner sphere of the inner ring, while stress concentration occurs near the oil holes on the outer surface of the inner ring and the inner surface of the outer ring.