Experimental Determination of SEA Parameters of Stiffened Cylindrical Shell Structure

P. Ramachandran; S. Narayanan

doi:10.4028/www.scientific.net/AMM.3-4.315

Paper Titles

An Inverse Procedure for Determining the Material Constants of Isotropic Square Plates by Impulse Excitation of Vibration
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Rolling Bearings Monitoring and Damage Detection Methodology
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Experimental Application of the Virtual Fields Method to the Identification of Material Properties Using Vibrating Plates
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A Study on Vibration-Based Damage Detection and Location in an Aircraft Wing Scaled Model
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Experimental Determination of SEA Parameters of Stiffened Cylindrical Shell Structure
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Locating Defects Using Dynamic Strain Analysis and Artificial Neural Networks
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High-Resolution Neutron Diffraction for Nondestructive Analysis of Residual Stresses in Polycrystalline Materials
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Measurement on Rotating Mechanical Component by Thermoelasticity
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Evaluation of Rugged 'Smart Patch' Fibre-Optic Strain Sensors
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 3-4Experimental Determination of SEA Parameters of...

Experimental Determination of SEA Parameters of Stiffened Cylindrical Shell Structure

Abstract:

A method to predict the modal density and radiation efficiency of orthogonally stiffened cylindrical shell is presented in this paper. The modal density is derived using energy method from the undamped natural frequencies of stiffened shell by treating the stiffeners as discrete elements. The band averaged radiation efficiency is estimated by categorizing the structural modes into acoustically fast and acoustically slow modes. The predicted parameters are compared with experimental results using laser vibrometer measurements. Phase-roll off has been observed in laser vibrometer measurements for which a correction procedure is applied. This prediction method can be easily extended to shells with stiffeners having different size, orientation etc.