450MPa级船体钢焊缝疲劳试验研究  

Test Study of Fatigue Crack Propagation in 450MPa Grade Steel for Ship Body

作　　者：宗培[1] 王志国[1] 

机构地区：[1]海军工程大学船舶与海洋工程系,讲师430033

出　　处：《船舶工程》2002年第5期65-68,共4页Ship Engineering

摘　　要：通过对 4 5 0MPa级船体用钢母材试件、焊缝试件在波浪随机载荷和均方根等效载荷下的疲劳裂纹扩展规律的试验和模拟计算 ,结果表明用均方根等效载荷替代波浪随机载荷下的疲劳裂纹扩展规律是一种安全有效的方法 。An experiment of fatigue crack propagation of both the base metal and welded metal of 450MPa grade steel for ship body is made under the load of both random sea wave and constant equivalent average square root. The result shows that using the constant equivalent average square root load instead of the random sea wave load in determination of fatigue crack propagation of 450MPa grade ship body steel is a safe and effective method, and the behavior of welded metal is superior to the one of the base metal in retardation of fatigue crack growth.

关 键 词：450MPa级 船体钢 焊接 疲劳 疲劳裂纹 波浪随机载荷 

分 类 号：U668.2[交通运输工程—船舶及航道工程] TG113.25[交通运输工程—船舶与海洋工程]