scholarly journals Characterization of radiation regimes in nonrandom forest canopies: theory, measurements, and a simplified modeling approach

1999 ◽  
Vol 19 (11) ◽  
pp. 695-706 ◽  
Author(s):  
C. J. Kucharik ◽  
J. M. Norman ◽  
S. T. Gower
Keyword(s):  
Forest Canopies ◽  
Modeling Approach ◽  
Simplified Modeling

scholarly journals Acoustic characterization of high intensity focused ultrasound fields: A combined measurement and modeling approach

2008 ◽  
Vol 124 (4) ◽  
pp. 2406-2420 ◽  
Author(s):  
Michael S. Canney ◽  
Michael R. Bailey ◽  
Lawrence A. Crum ◽  
Vera A. Khokhlova ◽  
Oleg A. Sapozhnikov
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Modeling Approach ◽  
Acoustic Characterization

Vibration Analysis of Complicated Rotor-Bearing System by Beam Element and Strain Energy Method

2013 ◽  
Vol 712-715 ◽  
pp. 1414-1419 ◽  
Author(s):  
Wu Long ◽  
Yuan Qi ◽  
Liu Xin
Keyword(s):  
Strain Energy ◽  
Beam Element ◽  
Mode Shapes ◽  
Vibration Characteristic ◽  
Element Analysis ◽  
Accuracy Requirement ◽  
Modeling Approach ◽  
Complicated Geometry ◽  
Simplified Modeling ◽  
Bearing System

In this paper, a two-node beam element (as a simplified modeling approach) has been presented to investigate the vibration characteristic of rotor system with a complicated geometry. The decline of stiffness near the region of discontinuity is investigated on the basis of stain energy, and the conclusion is applied to the 2-node beam element analysis. In addition, the bending critical speeds and corresponding mode shapes of an integral rotor of 1000MW turbine have been investigated as an example. Verification results show that the simplified modeling approach by this 2-node beam element meets the accuracy requirement.

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