Target recognition by vibration frequency analysis: a comparison of laser vibrometry and acoustic methods

2003 ◽  
Author(s):  
Dietmar Letalick ◽  
Tomas Carlsson ◽  
Hans Habberstad ◽  
Makus Henriksson
Keyword(s):  
Frequency Analysis ◽  
Vibration Frequency ◽  
Target Recognition ◽  
Laser Vibrometry ◽  
Acoustic Methods

Finite Element Formulation and Vibration Frequency Analysis of a Fluid Filled Pipe

2005 ◽  
Author(s):  
Yi Jia ◽  
Reinaldo E. Madeira ◽  
Frederick Just-Agosto
Keyword(s):  
Finite Element ◽  
Coriolis Force ◽  
Frequency Analysis ◽  
Cross Sections ◽  
Vibration Frequency ◽  
Dynamic Performance ◽  
Element Model ◽  
Piping System ◽  
Element Formulation ◽  
Variable Cross

This paper presents the formulation of a finite element model and vibration frequency analysis of a fluid filled pipe having variable cross sections. The finite element method with consideration of Coriolis force developed in [1] was adopted for frequency analysis of a pipe in this study. The stiffness matrix, the c-matrix (Coriolis force) and mass (for dynamic analysis) matrix that contain all parameters of the fluids properties and flow conditions have been developed. The numerical model was employed to simulate the dynamic performance of the piping system with the specific configurations for an application. A critical relationship between the natural frequencies and pipe geometry has been established. The results of frequencies analysis of the piping system gave us an insight whether a resonance frequency might occur.

scholarly journals Notes on Vibration Frequency Analysis

1989 ◽  
Vol 111 (1) ◽  
pp. 119-120
Author(s):  
K. G. McConnell ◽  
H. Saunders
Keyword(s):  
Frequency Analysis ◽  
Vibration Frequency

Frequency analysis of turbulent compressible flows by laser vibrometry

2001 ◽  
Vol 31 (2) ◽  
pp. 153-161 ◽  
Author(s):  
N. Mayrhofer ◽  
J. Woisetschläger
Keyword(s):  
Frequency Analysis ◽  
Compressible Flows ◽  
Laser Vibrometry
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