BEARING DEVICE VIBRATION ANALYSIS METHOD, BEARING DEVICE VIBRATION ANALYZER, AND ROLLING BEARING CONDITION MONITORING SYSTEM

摘要

A vibration analysis method includes the steps of: inputting data about damage of a rolling bearing; calculating, by a dynamics analysis program, a history of a displacement between inner and outer rings occurring to the rolling bearing due to the damage when a rotational shaft of the rolling bearing rotates; calculating a vibration characteristics model of the bearing device by a mode analysis program; and calculating a vibration waveform at a predetermined position on the bearing device by applying, to the vibration characteristics model, a history of an exciting force obtained by multiplying the displacement between the inner and outer rings calculated in the step of calculating a history, by a bearing spring constant.

主权项

1. A bearing device vibration analysis method for analyzing vibration of a bearing device by a computer, the bearing device including a rolling bearing and a housing of the rolling bearing, the method comprising the steps of:
inputting data about a shape of damage given to a contact portion between a rolling element and a raceway surface of the rolling bearing; calculating a displacement between an inner ring and an outer ring of the rolling bearing caused by the damage; calculating a vibration characteristics model by a mode analysis program for analyzing a vibration mode of the bearing device, the vibration characteristics model representing a vibration characteristic of the bearing device; and calculating a vibration waveform at a predetermined position on the bearing device by applying, to the vibration characteristics model, a history of an exciting force occurring to the rolling bearing, the history of the exciting force being obtained by multiplying the displacement calculated in the step of calculating a displacement, by a spring constant between the inner ring and the outer ring.