摘要
利用大型工程分析软件IDEAS建立6000t拉伸矫直机拉伸头——固定夹头和活动夹头实体几何模型,用弹簧单元模拟预紧螺栓,对拉伸头承载能力进行有限元计算,分析了预紧螺栓及其预紧力对设备承载能力的影响,并通过现场测试验证分析计算的结果。结果表明预紧螺栓的存在使设备承载能力提高25%以上,螺栓预紧力每提高1000kN,C形板应力值下降约2.5%,当螺栓预紧力控制在5000kN时,该拉伸机最大拉伸能力可达55000kN。在实际使用过程中,充分发挥和有效控制预紧螺栓的预紧力,防止预紧螺栓在拉伸过程中松动,以保证设备的安全运行。
The solid finite element model of 6 000 t stretching head was constructed by using CAD/ CAM software I-DEAS, and based on the simulation and experiment, the bearable stretching force and the preload of the bolt were obtained. The analytical results showed that the load- carrying capacity of the device increased more than 25% with the application of the preload bolts and pretightening force. These research results provided theoretical foundation for the design and operation of this type of devices.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2006年第4期107-110,共4页
Transactions of the Chinese Society for Agricultural Machinery
关键词
拉伸矫直机
承载能力
有限元
应变测试
Stretching and straightening machine, Bearing capacity, FEM, Strain measurement
