Identification of rigid body properties from vibration measurements

2007 ◽  
Vol 299 (4-5) ◽  
pp. 884-899 ◽  
Author(s):  
R.A.B. Almeida ◽  
A.P.V. Urgueira ◽  
N.M.M. Maia
Keyword(s):  
Rigid Body ◽  
Vibration Measurements

Dynamic Properties of the Rigid Body and Supports from Vibration Measurements

1994 ◽  
Vol 116 (3) ◽  
pp. 269-274 ◽  
Author(s):  
S. M. Pandit ◽  
Y.-X. Yao ◽  
Z.-Q. Hu
Keyword(s):  
Rigid Body ◽  
Simple Structure ◽  
Dynamic Properties ◽  
Estimation Method ◽  
Body Structure ◽  
Vibration Measurements ◽  
Vibration Data ◽  
New Concepts ◽  
Rigid Body Modes ◽  
Novel Method

A novel method is presented to determine the dynamic characteristics of a multi-DOF rigid body structure from vibration measurements and coordinates of the transducers. These characteristics include the center of gravity, moment of inertia, and mass; stiffness, center of stiffness and moment of stiffness; damping, center of damping and moment of damping; and corresponding principal values and axes. The method is capable of handling complicated structures with various DOFs, from 2 up to maximum 6. The mass modified matrices M−1K and M−1C (or mass M, stiffness K, and damping C matrices) are first obtained based on measured vibration data and estimated rigid-body modes by Data Dependent Systems (DDS) methodology, which is accurate even for highly damped structures. Relationships between the physical characteristics and the mass modified matrices have been derived to solve the dynamic properties. The properties of up to 5 individual spring and dashpot supports can be determined by solving linear simultaneous equations. New concepts about the center of stiffness, moment of stiffness, center of damping, and moment of damping and the estimation method are presented. An example, using a simple structure, demonstrated the capability of the proposed method.

TWO PROBLEMS OF RIGID BODY MECHANICS

2016 ◽  
Vol 47 (7) ◽  
pp. 775-782
Author(s):  
Vladimir Alekseevich Shvilkin
Keyword(s):  
Rigid Body ◽  
Rigid Body Mechanics

Time-Frequency Analysis of Shock and Vibration Measurements Using Wavelet Transforms

2014 ◽  
Vol 2 (1) ◽  
pp. 60-69
Author(s):  
Divya Choudhary ◽  
◽  
Siripong Malasri ◽  
Mallory Harvey ◽  
Amanda Smith
Keyword(s):  
Frequency Analysis ◽  
Wavelet Transforms ◽  
Vibration Measurements ◽  
Time Frequency Analysis ◽  
Time Frequency
Sign in / Sign up

Export Citation Format

Share Document