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某厂1100初轧机建于1933年,解放后经多次改造,更换了机架及连接轴等重要零件,使产量提高五倍多。为了进一步发挥该轧机的潜力,对其重要零件需进行实测与验算。由于常规计算未考虑诸设计参数的随机特点,而可靠性计算恰恰考虑了各主要影响因素的概率分布,所以可靠性计算比常规计算更接近实际情况。 如果已知机架材料强度的概率分布及机架上所拟计算应力点上的工作应力(或载荷)的概率分布,则按应力-强度干涉理论(见
A mill 1100 initial mill was built in 1933, after liberation after repeated transformation, replacement of the rack and connecting shaft and other important parts, so that output increased more than fivefold. In order to further develop the potential of the mill, the important parts of the mill need to be measured and checked. Since the conventional calculation does not consider the random characteristics of the design parameters, and the reliability calculation just takes into account the probability distribution of the main factors, the reliability calculation is closer to the actual situation than the conventional calculation. If you know the probability distribution of rack material strength and the probability distribution of work stress (or load) on the rack at the stress point to be calculated, according to the stress-strength interference theory (see