3.可靠度计算 3.1— 非稳定循环随机确定应力下可靠度计算 非稳定循环随机应力如图5所示。齿轮接触应力处于这种情况的机械很多,如机床和轧钢机上的齿轮,只当改变切削用量和换轧一种产品时载荷才明显变化,齿轮的接触应力也相应变化。图中S_1、S_2、……S_k表示在一定循环次数内齿轮所受的应力。 3. Reliability Calculations 3.1—Reliability Calculation under Uncertain Cycle Randomly Determined Stress The non-steady cyclic random stress is shown in Figure 5. Gear contact stress is a lot of machinery in this situation, such as the machine tool and the gear on the rolling mill, only when changing the cutting amount and changing the load when a product changes significantly, the contact stress of the gear also changes accordingly. In the figure, S_1, S_2, ... S_k indicate the stress on the gear within a certain number of cycles.