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本文在扼要地推出各种规则几何形状缺陷在远声场中的定量式的基础上,考虑了脉冲波的频率分布对缺陷界限大小取值的影响,讨论了运用一个缺陷界限大小的方便性和可能性。在此基础上将远声场中缺陷一般定量式简化成一些简单的缺陷定量式,通过远近声场中缺陷定量式的关系,将远声场中的简化式修改成活塞波源定量式,并引入简单缺陷的平均指向单数,使各种规则形状缺陷在声程大于 No 的范围内部都能用较精确的公式予以计算。并通过钢中的横孔试验予以验证。
In this paper, based on the quantitative introduction of various geometric defects in the far sound field, the influence of the frequency distribution of the pulse wave on the size of the defect boundary is considered. The convenience and possibility of using a defect size limit are discussed Sex. On the basis of this, the defects in the far-sound field are generally quantitatively reduced to some simple quantitative methods. By the quantitative relationship between the far and near sound fields, the simplified form in the far-sound field is modified into the quantitative method of the piston source, and the simple defect Average point singular, so that a variety of regular shape defects in sound path greater than the range of No can be more accurate formula to be calculated. And through the hole in the steel test to be verified.