Quasi-static stability of a ribbed shell interacting with moving load

• Published in: INCAS bulletin Vol. 11; no. S; pp. 33 - 39
• Main Authors: ANTUFEV, Boris A., EGOROVA, Olga V., RABINSKIY, Lev N.
• Format: Journal Article
• Language: English
• Published: Bucharest INCAS - National Institute for Aerospace Research "Elie Carafoli" 01.08.2019; National Institute for Aerospace Research “Elie Carafoli” - INCAS
• Subjects: Aircraft; Aircraft rockets; Aircraft stability; critical speed; Critical velocity; Cylindrical shells; discrete location of the ribs; Elastic waves; flat shell; Heat conductivity; High temperature; Load; loss of stability; mobile radial load; Moving loads; Partial differential equations; quasi-static solution; Shallow shells; Shell stability; Static stability; Stiffeners; Stiffening; Stringers; Structural members; Structural stability; Velocity
• ISSN: 2066-8201; 2247-4528
• DOI: 10.13111/2066-8201.2019.11.S.4

Loss of stability of thin-walled structural elements of aircraft is the most common type of destruction. In this work, the definition of the critical velocity of a pressure wave moving over the surface of an acclivous, ribbed cylindrical shell, which is the most common design element of all aviation and rocket systems, is considered. The article takes into account the discreteness of the location of stiffeners (stringers), in contrast to other works, where ribbing is taken into account only within the framework of a constructive orthotropic model. In the quasi-static formulation, the problem of the stability of a shallow shell with a discrete arrangement of stringers under the action of a moving radial load has been solved. The range of critical speeds of movement of the load is defined. An example is considered.