【摘要】 采用横截面为扇形结构的试验模型模拟蒸汽发生器入口段传热管,对其在不同缝隙流速下受到的随机湍流激励,采用Axisa和Taylor等提出的等效功率谱密度(EPSD)方法进行研究,并与Taylor和Pettigrew提出的推荐准则进行比较。研究发现,EPSD曲线在约化频率(fR)约为1处出现峰值,该峰值已接近推荐准则边界。根据试验结果对原推荐准则提出修正,得到一个更能反映传热管实际振动情况的新准则。更多还原

【Abstract】 Random-turbulence excitation research of steam-generator inlet tubes simulated sector model under different pitch velocities has been done by using equivalent power spectral density(EPSD) method given by Axisa and Taylor et al. Compared the measured EPSD to Taylor and Pettigrew’s suggested guidelines, a peak of EPSD at fR≈1 has been observed, which was closed to the guideline boundary. According to test results, the guidelines were been modified and new guidelines were been obtained which were more closed to actual vibration of tubes.更多还原