激光焊蜂窝夹套的结构强度研究

【作者】 朱维波；

【导师】 林兴华；

【作者基本信息】 浙江大学 ， 化工过程机械， 2003， 硕士

【摘要】 蜂窝夹套设备是广泛应用于轻工、化工、食品等行业的新型换热设备。激光焊蜂窝夹套是先进制造技术和新型结构相结合的产物，具有制造方便、传热效果好、经济效益明显等优点，应用前景广阔。对其进行结构强度分析，具有重要的工程开发意义。 由于激光焊蜂窝夹套的特殊制造工艺及其新颖结构，需对其进行一个系统的实验研究和理论分析(主要是有限元数值模拟分析)。 本文所开展的主要工作如下： (1) 对夹套材料的弹性、塑性性能进行研究，为有限元分析打下基础。 (2) 对激光焊的焊缝进行金相分析和剖面放大观察，从焊缝组织和结构上来分析其对整个夹套结构的影响。 (3) 对夹套的制造关键—压力鼓胀过程进行分析，解决压力鼓胀过程中的鼓胀压力—鼓胀高度关系的盲目性问题。 (4) 对夹套壳体进行结构强度分析，求出夹套的安全使用压力。 (5) 通过以上的实验研究和有限元分析，提出一套比较适合激光焊蜂窝夹套从生产制造到使用安全校核的系列有限元分析方法。更多还原

【Abstract】 Honeycomb jacket is an efficient heat-exchange component, which is widely used in light industry, chemical industry and food industry. Laser welded dimple-plate jacket is a new type of honeycomb jacket, which is the product combined advanced manufacture technology with new structure. And it has some merit, such as easy manufacture, good heat-exchange effect and great economic effect and so on. So it has wide application foreground. Therefore it is of importance to study the analysis of structure strength for application of engineering.Due to the special manufacture craft and the new structure of laser welded dimple-plate jacket, it is necessary to be studied by experimental and theory analysis (mainly finite element analysis).In this paper, the main study items are as follows:(1) The elastic and plastic performances of laser welded dimple-plate jacket’s material are studied. And it is the groundwork of later jacket structure finite element analysis.(2) The metallographs of laser welding seam are tested. Through them, the welding seam’s structure is studied, which help us finding out the welding seam’s influence to jacket.(3) The key manufacture step-jacket’s pressure distention process is analyzed. It mainly analyzes the relation of distention pressure and distention height. Through it. the jacket’s pressure distention process becomes controllable.(4) The strength analysis is done with jacket’s shell. Through the analysis, jacket’s safe-used pressure is obtained. So it should verify jacket safe use.(5) Through above four items’ experimental studies and finite element analysis, a series of jacket structure finite element analysis method is obtained, which fits jacket manufacture and jacket using processes analysis.更多还原