The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Sep. 04, 2001

Filed:

Jul. 09, 1998
Applicant:
Inventors:

Keiichi Motoyama, Wako, JP;

Toshiyuki Arima, Niiza, JP;

Masatoshi Shirotori, Asaka, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 9/455 ;
U.S. Cl.
CPC ...
G06F 9/455 ;
Abstract

An initial object shape is set in a first process, a numeric fluid dynamic grid is generated on the surface of the object shape in a second process, and Navier-Stokes equations are numerically solved by numerical fluid dynamics based on the object and the grid generated with the object shape and an object surface pressure is determined in a third process. The noise generated by the object is a determined in a fourth process, by solving Curle's formula based on the object surface pressure, and noises are again determined in a fifth process by updating the object shape and repeating the first through fourth processes. By determining an object shape based on a shape which generates the smallest noise from among the noises determined by the fifth process, it becomes possible to determine a shape of the object as a shape capable of minimizing aerodynamic noise generated upon movement of the object through a fluid medium.


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