林业机械结构的时变可靠性设计

Time-Dependent Reliability Design of Forestry Mechanical Structure

采用随机过程和顺序统计理论建立了考虑随机载荷和强度退化情况下林业机械零件的时变可靠性功能方程模型,利用二阶矩和摄动方法求出可靠性指标并计算出零件的时变可靠度。实例计算结果表明,建立的功能方程模型符合实际工况。

Using random process and sequence statistical theory, a time-dependent mechanical components is established, which allows for random loads and strength functional equation model of forestry degradation. A second moment and a perturbation method are used to get reliability indexes in order to calculate the time-dependent reliability of components. The actual calculation result shows that the establishment of the functional equation model complies with the actual working conditions.