Analysis of normal incidence absorption of pyramidal polyurethane foam by three-dimensional finite element frequency domain acoustical analysis

2006 ◽  
Vol 120 (5) ◽  
pp. 2686-2693 ◽  
Author(s):  
Huoy-Shyi Tsay
Keyword(s):  
Finite Element ◽  
Frequency Domain ◽  
Polyurethane Foam ◽  
Three Dimensional ◽  
Normal Incidence ◽  
Acoustical Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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