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:
Sep. 20, 2011
Filed:
Apr. 02, 2008
Arnold Kuehhorn, Berlin, DE;
Bernd Beirow, Cottbus, DE;
Arnold Kuehhorn, Berlin, DE;
Bernd Beirow, Cottbus, DE;
Abstract
For determining production-inherent mistuning of integrally manufactured rotor wheels (blisks) on the basis of the identification of blade natural frequencies, the individual blades are excited independently of each other and the vibratory response is measured for the calculation of the respective blade natural frequency and of mistuning. During measurement the blades not under investigation are additionally mistuned by temporarily applying an identical extra mass to each of them, such that coupling effects disturbing the measurement of the vibratory response of the excited blade are shifted away from the natural frequency-near range of the blades and hence eliminated.