Power flow analysis for a floating sandwich raft isolation system using a higher-order theory
نویسنده
چکیده
A higher-order sandwich theory is implemented in conjunction with an equivalent mobility-based power flow progressive method to determine power flow for a sandwich configured floating raft vibration isolation system. The power spectrum changes in whole frequency range effectively when core materials’ properties change. It is also shown that the loss factors of the sandwich configured floating raft influence the power flow transmitted to the foundation effectively in the mediumto high-frequency range and that the resonant peak cannot be avoided by increasing damping only in highfrequency ranges which is not found in floating raft isolation systems with isotropic beams. r 2008 Elsevier Ltd. All rights reserved.
منابع مشابه
Free Vibration and Buckling Analysis of Sandwich Panels with Flexible Cores Using an Improved Higher Order Theory
In this paper, the behavior of free vibrations and buckling of the sandwich panel with a flexible core was investigated using a new improved high-order sandwich panel theory. In this theory, equations of motion were formulated based on shear stresses in the core. First-order shear deformation theory was applied for the procedures. In this theory, for the first time, incompatibility problem of...
متن کاملFree Vibration of a Thick Sandwich Plate Using Higher Order Shear Deformation Theory and DQM for Different Boundary Conditions
In this paper, the effect of different boundary conditions on the free vibration analysis response of a sandwich plate is presented using the higher order shear deformation theory. The face sheets are orthotropic laminated composites that follow the first order shear deformation theory (FSDT) based on the Rissners-Mindlin (RM) kinematics field. The motion equations are derived considering the c...
متن کاملPower Flow Based Analysis of a Floating Raft Vibration Isolation System
A floating raft system (FRS) is typically used for vibration isolation of shipboard machinery. Earlier investigations have analyzed the effectiveness of this system using progressive receptance/mobility based approaches. In this paper, a vibration power flow based approach in the framework of component mode synthesis (CMS) is proposed. Both fixed-fixed and fixed-free CMS formulations are compar...
متن کاملThermal Vibration of Composites and Sandwich Laminates Using Refined Higher Order Zigzag Theory
Vibration of laminated composite and sandwich plate under thermal loading is studied in this paper. A refined higher order theory has been used for the purpose. In order to avoid stress oscillations observed in the implementation of a displacement based finite element, the stress field derived from temperature (initial strains) have been made consistent with total strain field. So far no study ...
متن کاملOn the buckling analysis of functionally graded sandwich beams using a unified beam theory
In this paper, a unified beam theory is developed and applied to study the buckling response of two types of functionally graded sandwich beams. In the first type (Type A), the sandwich beam has a hardcore whereas in the second type (Type B), the sandwich beam has a softcore. In both the type of beams, face sheets are made up of functionally graded material. The material properties of face shee...
متن کامل