Vibrations of Cylindrical Sandwich Shells with Elastic Core Under Local Loads

Dynamics of Three-layer Cylindrical Shells Elliptical Cross-Section With a Longitudinal-Transverse Discrete Ribbed Filler

“…The complexity of constructing mechanical models of multilayer shells and the application of fundamentally different kinematic and static hypotheses leads to a large variety of calculation schemes and equations [1 -22]. It is known that when constructing multilayer shell variants, there are two main approaches to constructing mathematical models that are based on the use of unified hypotheses for the entire package [3,5,[7][8][9][10][11][14][15][16][17][18][19][20][21][22] and hypotheses that take into account the kinematic and static characteristics of each layer [ 1,6]. In accordance with the terminology proposed in [3,6], the model and the theory of the second approach are called "discrete-structural" when considering three-layer shells with ribbed filler, the following approaches are also valid: the constructive-orthotropic model of threelayer membranes and the model taking into account the discrete location of the filler elements .…”