This book presents in detail an alternative approach to solving problems
involving both linear and nonlinear oscillations of elastic distributed
parameter systems. It includes the so-called variational, projection and
iterative gradient methods, which, when applied to nonlinear problems,
use the procedure of linearization of the original non-linear equations.
These methods are not universal and require a different solution for
each problem or class of problems.However, in many cases the combination
of the methods shown in this book leads to more efficient algorithms for
solving important applied problems.To record these algorithms in a
unified form, the first part of the book and its appendix devote
considerable attention to compiling the general operator equations,
which include (as particular cases) equations for vibrations in rods,
plates, shells and three-dimensional bodies. They are mainly considered
to be periodic or nearly periodic oscillations, which correspond to stat
ionary or nearly stationary regimes of machinery operation. In turn, the
second part of the book presents a number of solutions for selected
applications.