Presentation of a Framed Cyclically Symmetric Structure as a Ring Plate

Abstract

The problem of calculating a cyclically symmetric design for the nodal radial load action is being solved in the article. The analysis of the stress-strain state of a circular ring plate subjected to the action of a regular distributed load along the outer contour is made. A comparison of the operation of the framed structure and its continuous analogue is performed. The thickness of an isotropic ring plate, which is equivalent in the static ratio of a planar framed structure of a regular construction is determined.

Mission Performance and Cost Calculation for variable Rotor Speed Drivetrain

“…The cost calculation model used in this master thesis, is based on the report done by Vladimir Zhuravlev and Pavel Zhuravlev for the Vari-Speed project [17].…”

“…The following equations can be found in [17]. The factors that are used in the equation are read into the program from the sheet "helicopter data" in the mission file.…”

“…In their report Zhuravlev, V. and Zhuravlev, P. surveyed the rotorcraft missions to identify the requirements to apply the variable speed transmission systems in actual helicopter operation. The report 'Cost Model for Helicopter Missions' [17] gives an insight into how the different costs that arise during the execution of a mission are composed. It goes into detail about the calculation of the cost shares like depreciation costs, fuel costs and overhaul costs.…”