Through the examination experiment on three tube pieces' crack part, the relation of crack width, the maximum of leak magnetic field and differential coefficient is found out.

通过对三个管件的裂纹部位的检测实验，找出裂纹宽度与漏磁场的最大值和变化梯度之间的关系。

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Through the examination experiment on four tube pieces crack part, the relation of crack width, the maximum of leaking magnetic field and differential coefficient K is found out.

以经爆破试验的四件小钢管件裂纹为研究对象，找出裂纹宽度与磁记忆信号的关系，得出漏磁场变化梯度的最大值随裂缝宽度增加而增加。

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Through a fatigue life experiment on a sampling part, and with a thereafter algorithm, the different effectiveness are determined between the empty stop-crack holes and riveted stop-crack holes.

通过试件的疲劳寿命试验与计算，研究了空止裂孔与铆钉填充止裂孔对构件裂纹的止裂作用。

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