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.
Patent No.:
Date of Patent:
Mar. 10, 2009
Filed:
Apr. 18, 2005
Jérôme Dupeux, Vaux le Penil, FR;
Christian Dupont, Dammarie les Lys, FR;
Jean-pierre Lombard, Pamfou, FR;
Eric Seinturier, Bruges, FR;
Jérôme Dupeux, Vaux le Penil, FR;
Christian Dupont, Dammarie les Lys, FR;
Jean-Pierre Lombard, Pamfou, FR;
Eric Seinturier, Bruges, FR;
SNECMA, Paris, FR;
Abstract
A method to introduce a deliberate mismatch into a turbomachine bladed wheel so as to reduce vibration amplitudes of the wheel in forced response. The method includes a step of determining an optimum value of the standard deviation for the mismatch as a function of operating conditions of the wheel inside the turbomachine, with respect to the maximum vibration amplitude response required on the wheel. The method further includes a step of at least partly placing blades with different natural frequencies on the wheel such that the standard deviation of the frequency distribution of all blades is equal to at least the mismatch value, the mismatch value being determined statistically.