Gear contact fatigue life reliability evaluation method and device under variable amplitude loading

• Main Authors: LI YONGPING, GUO YANG, LI MINGKAI, YU HUAN, KANG HEMING, DENG HAILONG, LIU QICHEN
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; PHYSICS

The invention relates to a gear contact fatigue full-life evaluation technology, and particularly discloses a gear contact fatigue life reliability evaluation method and device under variable amplitude loading. The method comprises the following steps: determining an optimal maximum contact stress calculation method based on an empirical formula and numerical model calculation; constructing a gear contact fatigue initiation life evaluation model under the variable amplitude loading in combination with a nonlinear damage function; constructing a gear contact fatigue extension life evaluation model under the variable amplitude loading; constructing a gear contact fatigue full-life evaluation model according to a gear initiation and extension failure mode; and based on load and strength relations, establishing three life state equations in combination with the three life evaluation models, and solving reliability indexes, so that it can be known that the accuracy of the reliability evaluation method of the gear