Abstract: The present invention discloses a method for the rapid assessment of the service life of a hub bearing under multiaxial random road loading, comprising the following steps: acquiring a measured load spectrum of a wheel center of an automobile, and converting the wheel center load into an axial load and a radial load borne by a hub unit; performing load level division on the axial load and radial load borne by the hub unit, and performing joint distribution counting; according to the deformation coordination relationship between a roller and a raceway of the bearing, establishing a bearing contact model under a joint load, and according to the bearing contact model and the result of joint distribution counting, calculating the actual contact load of the bearing under different loads; and calculating the equivalent dynamic load and the life of the bearing through the actual contact load of the bearing to obtain the total equivalent damage of the bearing.

Abstract: The present invention discloses a method for the rapid assessment of the service life of a hub bearing under multiaxial random road loading, comprising the following steps: acquiring a measured load spectrum of a wheel center of an automobile, and converting the wheel center load into an axial load and a radial load borne by a hub unit; performing load level division on the axial load and radial load borne by the hub unit, and performing joint distribution counting; according to the deformation coordination relationship between a roller and a raceway of the bearing, establishing a bearing contact model under a joint load, and according to the bearing contact model and the result of joint distribution counting, calculating the actual contact load of the bearing under different loads; and calculating the equivalent dynamic load and the life of the bearing through the actual contact load of the bearing to obtain the total equivalent damage of the bearing.

Abstract: The present invention discloses a compilation method for a reliability test load spectrum of a high-speed bearing of an electric drive system. The method comprises the following steps: based on load data of a whole life cycle of an electric drive system, correlating a leading failure load of a high-speed bearing; counting an action frequency of each load level by a multi-dimensional load joint counting method; constructing a bearing mechanical balance equation; determining a reliability test load level by damage contribution distribution and cumulative damage contribution distribution of different load levels; according to a principle of a consistent overall frequency and consistent damage, determining a time of the reliability test load level; and in combination with extreme load working conditions, finally constructing a reliability test load spectrum of the high-speed bearing.