發(fā)布時間：2018-03-18 00:22

  本文選題：振動聲調制　切入點：管座角焊縫　出處：《焊接學報》2015年03期 　論文類型：期刊論文

【摘要】：振動聲調制技術是一種新出現(xiàn)非線性超聲無損檢測方法.文中簡要介紹了此技術的檢測原理,并對其在復雜結構焊縫質量檢測中的應用進行了初步研究.制作了小徑管座角焊縫試樣,分別在單頻激勵和掃頻激勵條件下進行檢測.結果表明,缺陷試樣的調制強度均高于參考試樣,且在特定高頻頻率范圍內(nèi),二者差別顯著,更有利于焊縫質量判別.而采用掃頻技術可快速得到合適的高頻頻率范圍,提高檢測效率.與超聲C掃描檢測結果相比,采用振動聲調制技術對小徑管座角焊縫進行檢測是可行的,但缺陷的定位定量分析等問題還需要進一步研究.
[Abstract]:Vibration-acoustic modulation is a new method of nonlinear ultrasonic nondestructive testing. The principle of this technique is briefly introduced in this paper. The application of this method to the welding quality test of complex structure is studied preliminarily. The small diameter tube pedestal fillet weld specimen is made and tested under the condition of single frequency excitation and sweep frequency excitation respectively. The results show that, The modulation strength of the defect specimen is higher than that of the reference sample, and the difference between them is significant in the specific high frequency frequency range, which is more advantageous to the quality determination of the weld, and the suitable high frequency frequency range can be obtained quickly by using the frequency sweep technique. Compared with the results of ultrasonic C-scan, it is feasible to detect the fillet weld of small diameter pipe seat by using vibration and acoustic modulation technology, but the localization and quantitative analysis of defects need to be further studied.
【作者單位】： 哈爾濱工業(yè)大學先進焊接與連接國家重點實驗室;
【基金】：國家自然科學基金資助項目(51175113,51105033)
【分類號】：TG441.7
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本文編號：1627166