Aeeording to inspection of maaterial,physical and chemisal analysis at fracture area,finite analysis of blade stress and vibrstion,find root cause of rupture.Givve the method of improvement,to avoid it happen again and make unit operated safely.%对裂纹叶片进行了材料及断口理化检验及分析,同时采用有限元分析软件对该叶片的强度、振动作了精确的计算,找出了叶片叶根开裂原因,提出了改进方案,避免该叶片再次发生叶根开裂,保证机组安全可靠运行.
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