海上在役箱体式吊机现场应力测试及强度校核  

STRENGTH CALCULATION AND STRESS TEST OF THE IN-SERVICE BOX CRANE FOR FLOATING PRODUCTION STORAGE AND OFFLOADING

作　　者：周洪[1] 颜廷俊[1] 张岗[2] 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]中海油能源发展股份有限公司油田建设工程分公司,天津300452

出　　处：《机械强度》2016年第3期570-574,共5页Journal of Mechanical Strength

摘　　要：在长期服役过程中,海洋平台吊机处于十分恶劣的环境,服役吊机结构容易受到由老龄化引起的功能退化,如腐蚀损耗、疲劳裂纹或局部凹陷等,影响其安全使用。根据现场实际测绘的吊机数据,应用有限元软件Ansys对其建立有限元模型。得到了吊机的应力分布云图,指出了其应力较大部位,对这些区域进行了现场应力测试。并将有限元的计算结果与测试结果进行了比较,除测点1 941外,其余测点相差在14%以内。最危险区域应力值为247.96 MPa小于吊机材料的许用应力,满足强度要求。分析吊机关键部位应力变化与起升角度β的关系,当起吊重物接近最大工作载荷时,建议选取在β>15°的情况下工作。Due to long-term used in the harsh environment,the functional degradation of the FPSO crane such as corrosion,fatigue crack,local failure occurred. The functional degradation could affect the normal use of the FPSO crane. According to the actual surveying data,the finite element model of the FPSO crane has been established by finite element software Ansys. The stress of high stress area has been tested according to the stress distribution of the FPSO crane. The calculation results of Ansys have been compared with the test data. The errors between calculation results and test data are in 14%,except of point 1941.The stress value of the most dangerous area is 247. 96 MPa,which is less than the allowable stress of the crane. Thus the strength requirement is satisfied. The relation between stress of key area of crane and the angle β of lifting has been analyzed. When the weight of lifting is close to the maximum working load,the working condition of β 15°is preferred.

关 键 词：海洋平台 箱体吊机 有限元模型 应力测试 强度计算 

分 类 号：TH49[机械工程—机械制造及自动化]