屈强比对容器爆破压力计算公式精度的影响

发布时间：2018-11-10 10:02

【摘要】：借助于数理统计理论的F假设检验与t假设检验,建立了评价容器爆破压力计算公式精度的比较方法,分析了材料屈强比对福贝尔公式与流变应力公式精度的影响。通过对36组径比为1.3~4.71的钢制厚壁圆筒容器爆破压力实测值的研究,得到如下结论:福贝尔公式的合适应用范围是容器材料屈强比为0.4027~0.8852,主要精度指标为0.0866;流变应力公式的合适应用范围是容器材料屈强比为0.4997~0.8852,主要精度指标为0.0699;福贝尔公式的合适应用范围比流变应力公式广,流变应力公式在其合适应用范围的精度比福贝尔公式高。用流变应力公式设计材料屈强比为0.4027~0.8852的钢制厚壁圆筒,主要精度指标为0.0809,流变应力公式与福贝尔公式的精度无显著差异。
[Abstract]:With the help of F hypothesis test and t hypothesis test of mathematical statistics theory, a comparative method for evaluating the accuracy of pressure formula of vessel blasting is established, and the influence of material yield ratio on the accuracy of Faubert formula and rheological stress formula is analyzed. Based on the study of the blasting pressure of 36 steel thick walled cylindrical vessels with diameter ratio of 1.34.71, it is concluded that the suitable range of application of Faubert's formula is 0.4027 / 0.8852. The main precision index is 0.0866; The suitable range of application of rheological stress formula is that the yield ratio of container material is 0.49970.8852, and the main precision index is 0.0699; The suitable range of application of the Faubert formula is wider than that of the rheological stress formula, and the accuracy of the rheological stress formula is higher than that of Faubert formula. A thick walled steel cylinder with a yield ratio of 0.4027 to 0.8852 is designed by using the rheological stress formula. The main precision index is 0.0809. There is no significant difference between the rheological stress formula and the Faubert formula.
【作者单位】：武汉软件工程职业学院机械工程学院;湖北轻工职业技术学院机电工程学院;
【基金】：湖北省教育厅科研项目(B2016549) 武汉市“黄鹤英才(教育)”计划
【分类号】：TH49

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