發(fa)電(dian)(dian)(dian)機在運(yun)(yun)行中(zhong)，定(ding)(ding)(ding)子繞(rao)組上要(yao)承(cheng)受100Hz2倍工頻(pin)的(de)交變電(dian)(dian)(dian)磁(ci)(ci)力(li)，由此產生100Hz的(de)繞(rao)組振動(dong)。由于(yu)該交變電(dian)(dian)(dian)磁(ci)(ci)力(li)與電(dian)(dian)(dian)流(liu)的(de)平(ping)方成正比(bi)，故(gu)發(fa)電(dian)(dian)(dian)機容(rong)量越大(da)，定(ding)(ding)(ding)子繞(rao)線(xian)(xian)所承(cheng)受的(de)激振力(li)就越大(da)。由于(yu)定(ding)(ding)(ding)子繞(rao)組端(duan)部結構(gou)類似懸(xuan)臂梁，很(hen)難像線(xian)(xian)槽(cao)中(zhong)線(xian)(xian)律固(gu)定(ding)(ding)(ding)得那(nei)樣(yang)牢(lao)固(gu)，因(yin)此，較容(rong)易受到電(dian)(dian)(dian)磁(ci)(ci)力(li)的(de)破壞，特別是當(dang)定(ding)(ding)(ding)于(yu)繞(rao)組端(duan)部的(de)固(gu)有頻(pin)率在94～115Hz之間(jian)范圍(wei)內，和2倍工頻(pin)共振時，定(ding)(ding)(ding)子繞(rao)組端(duan)部將會發(fa)生嚴重的(de)短路燒損事故(gu)。由于(yu)制造(zao)廠(chang)設計問(wen)(wen)題(ti)，使(shi)有些發(fa)電(dian)(dian)(dian)機繞(rao)組端(duan)部緊固(gu)結構(gou)上存在缺陷，有的(de)發(fa)電(dian)(dian)(dian)機運(yun)(yun)行一段時間(jian)后，繞(rao)組端(duan)部綁(bang)扎松(song)動(dong)，引(yin)(yin)出線(xian)(xian)固(gu)定(ding)(ding)(ding)螺(luo)絲松(song)動(dong)。相當(dang)一部分(fen)發(fa)電(dian)(dian)(dian)機繞(rao)組端(duan)部及(ji)引(yin)(yin)出線(xian)(xian)振動(dong)問(wen)(wen)題(ti)比(bi)較突出，成為當(dang)前(qian)大(da)型(xing)發(fa)電(dian)(dian)(dian)機安全運(yun)(yun)行中(zhong)主要(yao)問(wen)(wen)題(ti)。