期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 32, 期 1, 页码 82-103出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X20948608
关键词
free vibration; whirling rotor; sandwich cylindrical shell; rotation; spin; piezoelectric array; distribution; porous; Galerkin; Campbell diagram
This study investigates dynamic characteristics of a novel porous cylindrical hollow rotor using the first-order shear deformation theory and Hamilton's principle. By placing functionally graded piezoelectric patches on its inner and outer surfaces and subjecting them to applied electric potential as sensor and actuator, the model is analyzed for mode shapes, natural frequencies, and critical speeds. The accuracy and validity of the work is verified through comprehensive comparisons with previous references, and a parametric study is presented to demonstrate the influence of various parameters on the structure.
This article studies dynamic characteristics of a novel porous cylindrical hollow rotor based on the first-order shear deformation theory and Hamilton's principle. The proposed model is made from a core including aluminum with porosity integrated with an arrangement of functionally graded piezoelectric patches placed on its inner and outer surfaces with a customized circumferential orientation. The piezoelectric patches are subjected to applied electric potential as sensor and actuator. The kinematic relations are developed based on the first-order shear deformation theory. Hamilton's principle is used to derive governing equations of motion with calculation of strain and kinetic energies and external work. Solution procedure of the partial differential equations of motion is developed using Galerkin technique for simple boundary conditions. The accuracy and trueness of this work is justified using a comprehensive comparison with previous valid references. A large parametric study is presented to show influence of significant parameters such as dimensionless geometric parameters, porosity coefficient, angular speed, inhomogeneous index, and characteristics of patches on the mode shapes, natural frequencies, and critical speeds of the structure.
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