【Daily Question】 【AC Version for Static Equipment...Question 73】 March 14, 2019 – Revised multiple-choice questions...Everything is going well

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This post was last edited by kareale88 on 2019-3-14 09:32: bg4.png【Daily Question】【Static Equipment Exchange Version...Question 73】 March 14, 2019. Modified multiple-choice questions...Everything is going well...........................................................................The final voting stage for the 2018 “Top 10 Outstanding Members of Haichuan” has ended — hope you’ll be nominated for this year’s list! Wishes to my friends in Haichuan: happiness every year, a harmonious family life, good fortune and success, smooth affairs and good health, and prosperity throughout life! ........................................................................... Answers (multiple choice, multiple choice, multiple choice) please fill in in order. Reward rules: 1 wealth for participation, 3 wealth for each correct answer, up to a maximum of 10 wealth. ...........................................................................1. When manufacturing containers, marking transfer must be completed first before the material of the pressure-bearing components can be cut apart. ( )A、Correct ； B. Incorrect ； ---------------------2、Under uniformly distributed bending moments around its perimeter, the bending stress in a circular plate is evenly distributed throughout the plate, with radial and circumferential stresses being equal as well. （）A、Correct ； B. Incorrect ； ---------------------3. The equal-area reinforcement method is based on the assumption of the film stress state in a large plate with openings. The edges of large openings are subject to high bending stresses, and the stress conditions deviate too much from those in a thin-film state; therefore, this approach is not applicable. Stress analysis methods should be used for calculation, such as finite element analysis. ( ) A. Correct B. Incorrect --------------------- Answers: 1. A 2. A 3. A 1. Comment: Basic knowledge of pressure vessel manufacturing. Designers need to master the basic manufacturing processes. 2. Comments: This question relates to theoretical fundamentals and represents a typical type of stress condition in elasticity mechanics. A good understanding of the basic stress distribution in compressed components helps improve designers’ ability to analyze and address problems. Few people got this question right. 3. Why cannot the equal-area reinforcement method be applied to \"large openings\"? What method should be used to address this issue? The equal-area reinforcement method is based on the assumption of the stress state in thin plates with large openings. The edges of large openings are subject to high bending stresses, and the stress conditions deviate too much from those in a thin-film state; therefore, this approach is not applicable. Stress analysis methods should be used for calculation, such as finite element analysis. Comment: This question is a theoretical foundation issue. A good grasp of this topic helps designers understand the standards and select the appropriate design calculation methods. Only by clarifying the basic concepts can one make flexible use of the various calculation methods provided in the standards in the design process, thereby selecting structures that are more suitable for the process conditions; it also helps to clarify the concept that stress analysis methods should be used to calculate structures with large openings.