EXTREME MODAL PATTERNS OF VIBRATING TWO-SPAN BEAMS

摘要

Vibration confinement known in technical literature also under the term of vibration localization is a consequence of slight disorder in nominally periodic structure possibly leading to radical changes of the dynamic characteristics of structures. The ultimate effect of localization is the partial absence of vibration in some areas of the structure while in complementary parts high levels of vibration may occur. The aim of the paper is to develop efficient analytical and numerical tools enabling the clarification of those conditions which lead to substantial separation of dynamically active and passive regimes. Two-span beams of various boundary conditions have been chosen as suitable mathematical model due to its relative simplicity and assumed ability to properly represent the phenomena under the study.