Antenna Installation Stress Calculation 2

[Megatronic]

Hi,

I am looking for a good book or other way to learn about stress calculations for aircraft antenna installation and other (simple) structure modifications (instrument panels, bracket and racks for avionics equipment,...)

I am working as an Avionics Engineer and I am keen to also learn the structural side of various modifications.

Thanx,
Michael

 

[RPstress]

This sort of thing (systems installations and mods) is usually handled by relatively simple hand calcs and the odd local FE model. I personally don't know of any reference dedicated to this. Niu's book "Airframe Stress Analysis and Sizing" has quite a bit on detail stressing which would be relevant. Any of the major's stressing guides (Boeing 6000-series BDMs, Lockheed Stress Memos, etc.) also have a great deal on detail stressing.

 

[rb1957]

the best example would be an existing calc ... but be carefull not to blindly follow it ... it may have (knowing or unknowingly) overlooked some aspects of the analysis.

issues ...
rigidity of the support structure (vibration of the antenna),
ground handling loads (usually flight inertia and aerodynamic loads are very small),
damage tolerance (external doubler affecting inspection, external doubler causing load transfer that is usually the critical fatigue issue)

niu is a good textbook, i like bruhn's very practical approach but alot of his methods are showing their age (we have much more computing capability at our finger tips than he did !).

personally i'd avoid AC43-13

good luck