Regarding WRC297
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I saw President Wang’s discussions on the Aisifu forum; it seems he mentioned that there are issues with WRC297. What do everyone think? I have a few questions: 1. What does “stiffernor or head” refer to in the terms Distance to stiffernor or head and Distance to opposite stiffernor or head? If there is a horizontal cylindrical container with its pipe opening located in the middle of the supports, does this distance refer to the distance from the pipe opening to the supports or to the end cap? Does the order of these two distances matter? 2. Where can I find information on Vessel pad thickness?
1: Distance to stiffernor or head – For horizontal containers, this refers to the distance from the pipe opening to the nearest end cap; Distance to opposite stiffernor or head refers to the distance to the other end cap； It has nothing to do with the support. 2: Vessel pad thickness refers to the thickness of the reinforcement ring at the pipe opening, which can be determined by referring to the equipment diagram.
Thank you so much. How should an elliptical head be simulated? Should it also be modeled using pipes?
The use of WRC297 is limited; it is only suitable for calculating the local stresses in cylinder nozzles with a specific structure under external loads. Nozzles on elliptical heads cannot be calculated using WRC297.
Do the operating conditions for WRC297 refer to simulating the NOZZLE or to checking stresses?
WRC297 provides only a method for calculating the local stresses in cylinder nozzles under external loads; it has certain requirements regarding the structural dimensions of these nozzles. It does not offer any methods for checking stresses, nor even methods for combining stresses. You can find a book to read, just take a look at 107.
WRC297 was published in 1984, attempting to extend the existing stress analysis tools for column-column intersection zones. The main difference from the widely used WRC107 is that WRC297 is suitable for cases with a higher d/D ratio (up to 0.5), and can also be used to calculate the stresses in the nozzles and cylinders ； While WRC107 can only calculate the cylinder stress.
WRC297 is equivalent to a nozzle that is attached to the device and deforms along with it; therefore, using WRC297 increases the flexibility of the nozzle, making it easier to pass the stress verification
In CAESARII, for the output results of WRC297, how can one determine whether the stress analysis at the nozzle is successful?