ABOUT THE FREE-VIBRATION MODE SHAPES OF ELASTOPLASTIC DISSIPATIVE SYSTEMS

Recognition of Vibration Mode Shapes Using 3d Computer Visualisation

One of the major problems in experimental vibration analysis is to determine location of transducers. It is important to place the transducers on locations with largest vibration amplitude and to avoid locations with zero-movement (nodal lines). These locations are best seen from vibration mode shapes. Finite element analysis (FEA) provides numerical values for natural frequencies, which are so...

Free Vibration Analysis of Variable Stiffness Composite Laminates with Flat and Folded Shapes

In this article, free vibration analysis of variable stiffness composite laminate (VSCL) plates with flat and folded shapes is studied. In order to consider the concept of variable stiffness, in each layer of these composite laminated plates, the curvilinear fibers are used instead of straight fibers. The analysis is based on a semi-analytical finite strip method which follows classical laminat...

Large-Scale Dissipative and Passive Control Systems in Symmetric Shapes

We study symmetries in the design of large-scale dissipative and passive control. In the framework of dissipativity and passivity theory, stability conditions for large-scale systems are derived by categorizing agents into symmetry groups and applying local control laws under limited interconnections with neighbors. We show that there exists an upper bound on the number of subsystems that can b...

Evaluation of the digital image correlation method for the measurement of vibration mode shapes

an investigation about the relationship between insurance lines and economic growth; the case study of iran

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