A Research of Structural Analysis Model for Steel Structures on Finite Element Method

研究开发了船舶产品定义系统SODAS（System Of Design and assemblies for Shipbuilding）。soda是基于产品模型的概念实现的。我们认为一个产品模型应该从设计阶段到制造阶段始终如一地使用。另一方面，由于近年来有限元分析技术的发展和计算机硬件的快速进步，有限元分析已成为工业产品设计阶段的有用工具。其中最大的困难是对工业产品的复杂结构进行建模，这是工程师最耗时的工作。在本研究中，我们提出了一个基于模型的有限元分析系统。这个基于模型的有限元分析系统是基于先前实现的SODAS。为了建立有限元模型，对SODAS中的产品模型信息进行了修正。并将结构构件的结构功能引入到产品模型中。研究表明，产品模型的实用性不仅在设计阶段得到证实，在有限元分析阶段也得到证实。大型构筑物通常采用船坞侧起重机进行吊装，但在船舶安装阶段的吊装技术研究较少。原因是这些技术到目前为止都是由高技能人才支持的。现在的情况在人力资源方面发生了根本性的变化。我们正面临着不能依靠技术人员的问题。为了克服这一问题，计算机辅助技术被认为是最有力的方法之一。在本研究中，采用SODAS软件设计了一个安装阶段的计算机仿真系统。

We have studied and developed SODAS(System Of Design and Assembling for Shipbuilding), which is the Ship Product definition System for Shipbuilding. SODAS is implemented based on the concept of a product model. We consider that a product model should be used from design stage to manufacturing stage consistently.On the other hand, because of recent development of techniques of finite element analysis and rapid progess of computer hardware, the finite element analysis has become a useful tool in the design stage of industrial products. The biggest difficulty here is to make a model of complicated configuration of industrial products, whith is the most time consuming work for engineers.In this research, we propose a model-based finite element analysis system. This model-based finite element analysis system is based on the previously implemented SODAS.In order to make a finite element model, informations of product model from SODAS are revised. Furthermore the structural functions of structural members are introduced into a product model. It is shown in this research that a utility of a product model is confirmed not only in design stage but also in finite element analysis stage.And even though large scale of structures are usually carried by dock side crane, few studies have been done on the technology in the erection stage for shipbuilding. The reason is that those technologies have been thus far supported by the highly skilled people. Now situations is radically changing with respect to human resources. We are facing the problem that we will not be relied on the skillful people. In order to overcome this problem, computer aided technology is thought as one of the most powerful methods.In this research, a computer simulation system for the erection stage is considerd by using SODAS.