【Daily Question】November 23, 2015: Theoretical model for calculating tube sheet strength (first 60 participants + 2 rewards)
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This post was last edited by humanrzm on 2015-11-24 09:41. To increase the popularity of the heat exchange forum, a \"Question of the Day\" activity has been introduced there; this helps to foster an active atmosphere for technical exchanges while also providing members with certain financial rewards. 【Daily Question】Fill-in-the-blank: The theoretical model for calculating the strength of tube sheets in GB/T151 standard is. Answer: An axisymmetric circular plate with equivalent homogeneous weakening based on elasticity. Post your answer in the reply section to participate; this will earn you +2 wealth points (wealth is added automatically; no additional points or comments will be given if your answer is incorrect). If you answer all questions correctly, you’ll receive an additional +3 to +8 wealth points. Extra rewards will also be given for thorough analyses and explanations of the questions or answers, or for those that are supported by standard criteria. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help). Attraction Bonus: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator award you +Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank participants based on the content of their posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score earning +5 charm. Other content: AC version of heat exchange equipment – “One question per day” competition post (prizes available for participation; valid indefinitely). http://bbs.hcbbs.com/thread-1320941-1-1.html “[Study and discussion on GB/T151-2014 heat exchangers] Section 2 – Terms and definitions, general requirements”. http://bbs.hcbbs.com/thread-1399249-1-1.html [Mechanical Forum] – Recruitment for forum moderators and technicians; applications and referrals are welcome. [Valid indefinitely] – Come if you’re interested! 】http://bbs.hcbbs.com/thread-1288857-1-1.html Starting today, the Machinery Section is offering wealth to all members of the community; go and claim your share of it right away – the distribution of wealth has begun. http://bbs.hcbbs.com/thread-1489563-1-1.html
Theory of elastic shells----------------------------------------------
An axially symmetric circular plate structure with a uniform thickness and densely distributed openings.
The theoretical model for calculating the strength of tube sheets in GB/T151 standard is an elastic-equivalent homogeneous weakened axisymmetric circular plate (with radius Rt) combined with an annular circular plate without tubes around its perimeter
The tube bundle is used as an elastic support, while the tube sheet acts as a circular plate placed on this elastic foundation; the bending stress of the tube sheet is then determined based on the magnitude of the load, the stiffness of the tube bundle, and the conditions of the surrounding supports.
In general tube sheet calculations, the tube sheet is considered as a circular plate supported on an elastic foundation
The theoretical model for calculating the strength of tube sheets in GB/T151 standard assumes that the tube sheet is approximately axisymmetric; the tube sheets at both ends of the heat exchanger have the same material and thickness, and for fixed-tube-sheet heat exchangers, the two tube sheets also must have the same boundary support conditions.
An equivalent circular plate subjected to a uniformly distributed load, placed on an elastic foundation and weakened by uniformly distributed holes.
An equivalent circular plate subjected to a uniformly distributed load, placed on an elastic foundation, and weakened uniformly by the pipe holes.
The theoretical model for calculating the strength of tube sheets in GB/T151 standard is (an equivalent circular plate with fully distributed tubes and simply supported at the periphery).