calculating the combined ring-shell section I'
calculating the combined ring-shell section I'
(OP)
Hi,
When you try to compare the combined ring-shell sections, the required moment of inertia is I's formula which is straight forward. But when calculating the combined ring-shell section I' - what is the cross sectional area of the shell section contributing to the moment of inertia? Is it the nominal shell thickness (ts) * 1.10*sqrt(Do*ts) or ts minus the thickness required to withstand external pressure * 1.1*sqrt(Do*ts)?
Regards,
Monk
When you try to compare the combined ring-shell sections, the required moment of inertia is I's formula which is straight forward. But when calculating the combined ring-shell section I' - what is the cross sectional area of the shell section contributing to the moment of inertia? Is it the nominal shell thickness (ts) * 1.10*sqrt(Do*ts) or ts minus the thickness required to withstand external pressure * 1.1*sqrt(Do*ts)?
Regards,
Monk





RE: calculating the combined ring-shell section I'
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: calculating the combined ring-shell section I'
Regards,
Monk
RE: calculating the combined ring-shell section I'
Note that I' is computed on the composite ring-shell section per the parallel axis theorem with the width of shell section contributing as noted in the definition of I'.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand