Regarding the issue of the center distance between openings in the head
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In this design drawing, the holes in the head extend all the way to the fold of the head – is such a design reasonable? Are the openings in general end caps always located within 80% of the inner diameter? I would appreciate some guidance and analysis from those with more experience
The openings should be avoided as much as possible in the transition zone of the head.
Yes, the openings should be kept as far away as possible from the transition zone of the head.
Now there are no restrictions on the areas with openings in the end cap, and the structure shown in the diagram is fine
The strength was overestimated; I guess that’s why it was done that way
It is best to keep it within 0.8 times the diameter of the head
As long as the calculation is valid, that’s sufficient; the standards are merely suggestions, not mandatory requirements.
There are no restrictions on the areas without openings in the head; the structure is fine, as long as the reinforcement calculations for those openings are satisfactory...
What is the basis for the claim made upstairs that there are no restrictions on areas without openings, and how is the strength calculated?
The restriction on opening areas in end caps is a requirement from the old GB150-89 standard, and it has been removed