Is the length of the conical head taken into account when calculating the external pressure acting on the cylinder?
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This post was last edited by wx_Catherine_Mi on 2021-5-18 11:03. When performing external pressure calculations using SW6, regarding the calculation length L for the external pressure cylinder of the cylinder body, we all know that it is determined according to various scenarios shown in Figure 4-1 of GB150. Regarding the situation in Figure 4-1 b) of GB150, I would like to ask the experts: when the inertial moment at the joint is sufficient to allow the use of a support line, what value should L take according to the diagram? ； The moment of inertia is not sufficient, so it cannot be used as a support line; how should L be determined? Press c-2)? Figure C-2 seems more suitable for the tapered section; is it also applicable to conical heads?
I hope someone who understands can help me figure this out. Thank you first!
This post was last edited by wx_Catherine_Mi on 2021-5-12 at 16:01. I’m wondering how people go about determining the length for external pressure calculations in cases where the end cap is in the form of a conical shell.
Look, there’s a note at the top of Figure 4-1； Regarding the cone, please refer to 5.6.6.4.2 for guidance... External drawings are provided solely for manufacturing purposes or as a reference; not everything in them is necessarily accurate
Without the drawings, it’s impossible to determine right from wrong
You talk so much about being pedantic; it’s all qualitative. Technical discussions require quantitative data in order to be analyzed – diameter, pressure, material, thickness. How much is it?
Thank you for your reply! In other words, when performing calculations on a regular basis, with the lower end cap being a conical shell, how do you calculate the external pressure length?
Personal opinion: The cylinder and the cone are considered separately, and each must meet its own requirements (including the thickness and length of the reinforcement sections required for the cone, etc.)； Then, the software should display the maximum external pressure length allowed for the cylinder. By comparing this value with the total external pressure length of the equipment, if the maximum external pressure length permitted for the cylinder is greater than the total external pressure length of the equipment (as shown in Figure A-2), then the calculation results indicate that it meets the requirements
Continuing from above. It seems that in the software, it is now possible to choose whether big-endian or little-endian format should be used as the reference, so this option can be selected or unchecked when calculating cones.