A study on the relationship of positioning of marine piping support and piping deflection

• Main Authors: Kuo C. C., 郭家驥
• Other Authors: Chiou Y. W.
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/52885846486943104057

碩士 === 國立高雄海洋科技大學 === 輪機工程研究所 === 94 === Piping system plays an important role towards the design and manufacture of marine engineering. It is crucial for both of the arrangement of equipment and distribution of piping system, which having direct effect on the running and maintenance cost subsequently. The object of this thesis is by implementing of theoretical analysis to build up an universal recognized design of piping support, aims to study and compare the standard specification and the basis of theory currently exercised by ship factories. Our research uses Shell theory to exercise on the relationship of stress and strain of Rectangular Coordinate to infer the mechanics model of straight pipe. Then, we use Euler-Bernoulli beam theory to operate on the element of stress and strain, and take cantilever beam form to simulate and fix the mechanics model of single pipe with steel angle support. Finally, we adopt the Finite Element Method to integrate and calculate the relationship of the distance between piping support and the lateral displacement of piping support by coordinates transformation. Meanwhile, we take the examine method according to the real shipyards and owners to enforce the external load onto the week point of piping suddenly and centrally. Afterwards, we can review that the deflation of piping matches the standard of clubs of marine or not in order to verify whether the standard of shipyard is safe and reasonable. Base on the result of actual calculation when using Cylindrical Shell theory and Euler-Bernoulli beam theory on piping for comparing, the effect on lateral deflection of piping is more obvious under taking the analyst of Shell theory. Also, the biggest lateral deflection of piping calculating from two models is still considered as too small. As a result, we can confirm the rationality of the standard that the recent shipyard adopted. In the future, investigation can be extended to piping support of multi-piping system or piping system with elbow. Optimization Theory can even be developed and employed to design the piping support with the most optimized size and dimension. Meanwhile, by introducing software programming to achieve the user interface or user-friendly mode, the work of designer and on-site co-operator of piping system can also be facilitated.