固有变形计算方法及其在船舶焊接结构变形中的应用（英文）

发布时间：2018-04-11 04:16

本文选题：固有变形数据库 + 纵向固有收缩　；参考：《船舶力学》2015年09期

【摘要】：采用基于固有应变法的弹性有限元分析预测大型复杂结构的焊接变形的前提是必须已知焊缝附近的固有变形。结构的焊接残余应力与焊接变形取决于其接头的固有变形大小及分布,因此开发精确计算接头固有变形的方法,并依此建立一个完善的固有变形数据库对于大型复杂结构焊接变形的预测有重要意义。文中提出了几种计算固有变形的方法包括公式法、热弹塑性有限元法、实测法,并分别采用这几种方法对典型T型接头的横向固有收缩与纵向固有收缩进行计算,三种方法得到的结果比较一致。在此基础上,进一步以典型船体结构为研究对象,采用依照这三种方法建立的固有变形数据库对其焊接变形进行预测,并与实测数据进行比较,验证了该数据库的有效性。
[Abstract]:The premise of predicting welding deformation of large complex structures by elastic finite element analysis based on inherent strain method is that the inherent deformation near weld seam must be known.The welding residual stress and welding deformation of the structure depend on the size and distribution of the inherent deformation of the joint. Therefore, a method for accurately calculating the inherent deformation of the joint is developed.Based on this, it is important to establish a perfect inherent deformation database for the prediction of welding deformation of large and complex structures.In this paper, several methods for calculating inherent deformation are put forward, including formula method, thermoelastic-plastic finite element method, real measurement method, and the transverse and longitudinal natural shrinkage of typical T-joints are calculated by these methods, respectively.The results obtained by the three methods are consistent.On this basis, taking the typical hull structure as the research object, the welding deformation is predicted by using the inherent deformation database established according to these three methods, and compared with the measured data, the validity of the database is verified.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;江苏新扬子造船有限公司;
【基金】：Supported by the Science and Technology Department of Jiangsu Provinde(Grant No.BE2010172)
【分类号】：U671.8;TG404

【参考文献】