随着球形压力容器(以下简称球罐)日趋大型化,工作环境日益恶劣,要在制造、运输,安装和使用过程中完全避免裂纹的潜在和存在是困难的。探伤设备的不断完善,虽能检出越来越小的缺陷,但是,并不是所有的缺陷均对球罐有实质性的损害;有些被判为缺陷超标的球罐,在一定条件下也不是都不能使用,而继续使用又担心不安全。因此,亟需一套能在球罐使用过程中检测其裂纹发生、发展和诱发裂纹的高应力和应力集 With the ever-expanding spherical pressure vessels (hereinafter referred to as spherical tanks) and increasingly harsh working environments, it is difficult to completely avoid the potential and existence of cracks during manufacturing, transportation, installation and use. Continued to improve the testing equipment, although smaller and smaller defects can be detected, however, not all defects have substantial damage to the tank; some were judged as excessive defects of the tank, under certain conditions is not Can not use, but continue to use and worry about insecurity. Therefore, there is an urgent need of a set of high stress and stress tests that can detect the occurrence of cracks, develop and induce cracks during the use of the tank