Input regarding the equipment nozzles
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May I ask whether the device inlet is considered part of the device? A straight pipe section with a weight of 0 extends out, and then the device inlet parameters WRC297 are applied to the straight pipe section where it connects to the device inlet, right? This is what a colleague on the forum did in a simulation; it seems that’s how he handled it. Do the flanges at the device inlet need to be entered separately? Some expert could please explain this. PS: The image was taken from an English tutorial on CAESAR II; it seems quite complicated. Do the flanges on the nozzles also need to be simulated separately?
1. The 0-weight rigid component simulates the circumferential contraction of the device, representing the length from the device’s centerline to its outer diameter； 2. The flange is simulated based on actual conditions.
Thank you for your reply! Thus, the simulation of the equipment nozzle starts with the weight and stiffness of CNODE 0, followed by a pipe of the length of the equipment nozzle (excluding the thickness and length of the nozzle flange); meanwhile, the parameters for the WRC297 equipment nozzle are also taken into account ； Then simulate the nozzle flange and the other flange that pairs with it, right?
Yes, WRC297 is described the same way. But I have also seen this CNODE point placed at the flange connection.
The stress point at the pipe outlet is at 140, which is the same as the ANC240 point; therefore, the flange can be considered as part of the pipeline, and it should be determined whether to include it in the simulation.
What does ANC240 mean? Does it mean that node240 is fixed in place?
Previously, when simulating device nozzles, I would enter the WRC297 parameters and ignore the simulation of the nozzle flanges
Another aspect is the order of simulation: in the example, the device nozzle and the extending straight pipe section are first treated as one simulation unit (135-140), and then the nozzle, the nozzle flange, and the mating flange are simulated in the opposite direction (140-141, 141-142)
There is another issue, as shown in the figure. I simulated a pair of flanges, clicked on RAGID, and entered the other parameters (including length), but this error appeared during the final verification. It happened before when simulating other models as well; I’m not sure what the cause is
This post was last edited by My name is Tima on 2022-1-15 at 14:54. My approach is: 240 conde 140 (ANC), 140 – 141, 141 cnode 143 (ANC; this is the node number I added), then 143 – 142 (rigid flange), 142 – 135. See the figure below: Following the example, it is 240 conde 140 (ANC), 140 – 141, 141 – 142 (rigid flange), 142 – 135. During calculation, these points do not have ANC force, and therefore it is not possible to determine the forces acting on the pipe ends. Following my approach, data on force and torque is available at 143 (the additional ANC points). This is the force acting on the pipe outlet, which can be used for professional verification of the equipment.