| Abstract: | Fatigue assessment of the telescope support for the project SOFIA SOFIA is, in simplified terms, a Boeing 747 SP aircraft with a telescope on board. This paper discusses a proposal for the fatigue assessment of the telescope support. Basis of the proposal is the fatigue assessment procedure defined in Eurocode 3. Because the support is part of the aircraft pressure bulkhead it is safety relevant. Therefore the safety margin of the procedure had to be adjusted to the relevant aircraft standards. The telescope support can be considered as a rigid body which is loaded by a known acceleration spectrum. Therefore the fatigue assessment procedure for each specific point of the welded structure is reduced to a simple equation into which only the dead weight stress and the numerical value of the detail category for this point, taken from the classification tables of Eurocode 3, have to be inserted. |
