【Weekly Question】Topic post for collecting questions (2009)
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This topic is the main thread for collecting questions for the 2009 【Question of the Week】. The questions gathered in this topic overlap with regular activities. Additionally: Regular activity – a detailed discussion of all aspects of CAESAR II. Please post any questions you have in the comments!
I have a few questions: 1. How should a ball joint with angular displacement limits be entered? 2 How should the vibration relationship be entered? 3 How to calculate the natural vibration frequency of a piping system. How to adjust? 4 What kind of support structures require us to model them using steel structures in C2?
For accidental load conditions, the equation in standard B31.3 is: PD2/(Do2-Di2) + MA/Z + MB/Z < kSh. Here, MA represents the moment term generated by sustained loads, while MB represents the moment term generated by accidental loads. This equation indicates that in accidental load conditions, the stress is the sum of sustained stresses and accidental stresses. Therefore, we cannot rely solely on wind loads to meet the regulatory requirements. How can “W + P1 + WIND” be considered as a single load condition? The “W + P1 + WIND” condition is only applicable to linear systems; it is insufficient for nonlinear systems. For the same reason, “T1” is not sufficient for expansion load conditions. The best ways to establish accidental load conditions are: (1) W + P1 + T1 (OPE), (2) W + P1 + T1 + WIND (OPE), (3) W + P1 (SUS), (4) L1 – L3 (EXP), (5) L2 – L1 (OPE), (6) L5 + L3 (OCC). Is condition (6) equivalent to MA/Z + MB/Z?
How to model a Y-shaped tee in stress calculations in CAESARII, and how to take into account the stress increase factor
For example, how to apply loads that vary with coordinates, such as the static pressure of the medium inside the tower
How can the nozzles on the vessel or tower head be simulated accurately in CAESARⅡ?