防喷器壳体材料拉伸过程的声发射特性试验

摘要

In this paper, the tensile damage process of the shell material ZG25GrNiMo of blowout preventer were researched using acoustic emission technique. Analyzed the acoustic emission characteristics in different damage phases of this material were analyzed using parameter analysis and waveform analysis. The result indicated that the acoustic emission characteristics were different in yielding, plastic distortion and rupture process. The differences of frequency spectrums of different damage modes were evident.%采用声发射技术研究了防喷器主壳体材料ZG25GrNiMo的拉伸破坏过程。运用声发射参数分析方法分析了该材料在不同破坏阶段的声发射特性。分析结果表明，在材料屈服、塑性变形及断裂过程中的声发射特性具有明显的不同，且不同损伤模式的信号频谱存在明显的差异。