典型船体部件装焊过程结构应力连续模拟研究

焊接残余应力计算中最有效的方法之一是热弹塑性有限元法,但目前采用这种方法计算时很难按照船厂现场装配过程建模。针对这一问题,本研究采用工艺链连续模拟技术,按照船厂现场施工条件及装配流程,建立典型船体部件的拼焊点固、双面拼焊、肋板与桁材装配点固焊、肋板与桁材焊接的一系列工艺过程的连续计算模型,实现了该部件现场装焊过程的连续模拟,探索了装焊过程船体部件内应力的演变历程。研究表明:连续模拟技术可以用于预测船厂实际装焊过程的焊接残余应力,是探索工艺对船体结构强度影响的一项重要技术手段。

The continuous excavating technique system parameters optimization and economic assessment simulation model in open-pit mine

Based on the fundamental simulation theories and methods, this paper studies such questions as truck dispatching, discrete processing of belt system continuous haulage, belt system interlock, and economic assessment methods. On the basis of above studies, the paper establishes a simulation model for open pit mine semi continuous production technique system. The paper applies GPSS language to construct a simulation program, and the program has been successfully applied in a certain coalmine.