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A procedure for the creep analysis of diaphragms is proposed that is based on the multi-grid finite element method, Rabotnov-type creep aging theory and the method of variable parameters of elasticity. Three-dimensional calculation models of the diaphragm are constructed and the peculiarities of its stress-strain state are found taking into account the reduced resistance to creep in welded joints...
Two bar models of a transvesely cracked rotor are examined considering "breathing" of the slot. The first model is based on the elastic axis break due to crack. The other is based on the simple model of rotor line and simple, linear, binary model of the crack breathing mechanism. Strong non-linearities are introduced in the model of journal bearings, based on the theory of hydrodynamic lubrication...
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