ENGINE NOISE REDUCTION BY STRUCTURAL DESIGN USING ADVANCED EXPERIMENTAL AND FINITE ELEMENT METHODS

Due to the lack of the wings detail design progress and the limitation of ordinary detail design ways for the complicated design of wings, while a new wing detail design process was proposed based on traditional wing structural design approach, including two parts: the sub-components design and the particular design. The process involves taking loads on initial proofing structure, structural design, FEM (Finite Element Methods) analysis, and buckling analysis, etc. In the particular design, the structural loads were calculated by the corresponding deformation based on the initial proofing design. The detail components are designed based on the new design process which meets to all the design requirements. It shows that the new design process is feasible and available.

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340 Study on the low noise structural design of internal combustion engine : Noise reduction of gear casing

The Proceedings of the Dynamics & Design Conference ◽

10.1299/jsmedmc.2012._340-1_ ◽

2012 ◽

Vol 2012 (0) ◽

pp. _340-1_-_340-12_

Author(s):

Kazuhide OHTA ◽

Kouki TAJIMA ◽

Motoharu AKANO ◽

Akihiko NAKAHARA

Keyword(s):

Internal Combustion Engine ◽

Noise Reduction ◽

Structural Design ◽

Combustion Engine ◽

Internal Combustion ◽

Low Noise ◽

Engine Noise

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Equilibrium Profile of Modern Belted Radial Ply Tires: Its Determination and Performance Benefits

Tire Science and Technology ◽

10.2346/tire.13.410203 ◽

2013 ◽

Vol 41 (2) ◽

pp. 127-151

Author(s):

Rudolf F. Bauer

Keyword(s):

Finite Element ◽

Aspect Ratio ◽

Finite Element Methods ◽

Mathematical Analysis ◽

Internal Stresses ◽

Stress Concentrations ◽

Equilibrium Profiles ◽

Equilibrium Profile ◽

And Performance ◽

Beneficial Property

ABSTRACT The benefits of a tire's equilibrium profile have been suggested by several authors in the published literature, and mathematical procedures were developed that represented well the behavior of bias ply tires. However, for modern belted radial ply tires, and particularly those with a lower aspect ratio, the tire constructions are much more complicated and pose new problems for a mathematical analysis. Solutions to these problems are presented in this paper, and for a modern radial touring tire the equilibrium profile was calculated together with the mold profile to produce such tires. Some construction modifications were then applied to these tires to render their profiles “nonequilibrium.” Finite element methods were used to analyze for stress concentrations and deformations within all tires that did or did not conform to equilibrium profiles. Finally, tires were built and tested to verify the predictions of these analyses. From the analysis of internal stresses and deformations on inflation and loading and from the actual tire tests, the superior durability of tires with an equilibrium profile was established, and hence it is concluded that an equilibrium profile is a beneficial property of modern belted radial ply tires.

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