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发表时间：2018-01-01

发表刊物：机械设计与制造

期号：5

页面范围：127-130

ISSN号：1001-3997

摘要：To analyse the static strength and fatigue strength of pitch bearings in the MW wind turbine, we established the integral equivalent finite element model of the"blade-pitch bearing-hub"considered the bolt connection and bearing support structure stiffness. We used nonlinear spring to replace the contact of the bearing ball and bearing raceway in the finite element model, got the spring stiffness based on Herz theory. Besides, the spring keypoint and the bearing raceway were rigidly connected in order to simulate the contact between the ball and raceway. We used beam element to replace the bolt connection in the"blade-bearing-hub"finite element model. And the two ends of equivalent bolt was connected with the clamped parts by rigid connection in order to simulate the real bolt contact boundary conditions; in the model, we got the spring load as ball load, and then translated it to the contact stress based on Herz theory. Besides, we could analyse the change of contact angle and bearing ring deformation and stress.This model can be used to calculate the static strength and fatigue strength of pitch bearing considered the bearing support structure stiffness and bolt connection combined with the ISO standard.Besides it reduced the massive contact computation and improved the computational efficiency.

备注：新增回溯数据