TY - GEN
T1 - Blade stress estimation during multiple vibratory modes
AU - Ni, Kan
AU - Wang, X. Q.
AU - Mignolet, Marc
N1 - Funding Information:
The financial support of this work by the contract FA9550-12-C-0043 from the Air Research with Dr. Michael Kendra as Technical Monitor is gratefully acknowledged.
PY - 2013
Y1 - 2013
N2 - This paper focuses on the blade peak stress prediction from limited strain gage/tip-timing measurements when multiple vibratory modes are present and in the absence of a validated finite element model. The current protocol assumes that only one mode is present and only provides upper and lower bound estimates of the blade peak stress when multiple modes are important. Two candidate approaches are proposed here to resolve this situation; they are based on test measurements and data provided by the manufacturer/basic blade geometry information, e.g. aspect ratio, taper, thickness, twist, stagger, referred to as "blade descriptors". The first approach, referred to as the finite element model reconstruction approach, focuses on reconstructing a most likely finite element model of the blade given all available blade information. In the second approach, referred to as the knowledge-based approach, a database of finite element models corresponding to a broad set of blade descriptors is initially established then queried for the application considered. The formulation of these approaches and their successful preliminary validation is presented in details.
AB - This paper focuses on the blade peak stress prediction from limited strain gage/tip-timing measurements when multiple vibratory modes are present and in the absence of a validated finite element model. The current protocol assumes that only one mode is present and only provides upper and lower bound estimates of the blade peak stress when multiple modes are important. Two candidate approaches are proposed here to resolve this situation; they are based on test measurements and data provided by the manufacturer/basic blade geometry information, e.g. aspect ratio, taper, thickness, twist, stagger, referred to as "blade descriptors". The first approach, referred to as the finite element model reconstruction approach, focuses on reconstructing a most likely finite element model of the blade given all available blade information. In the second approach, referred to as the knowledge-based approach, a database of finite element models corresponding to a broad set of blade descriptors is initially established then queried for the application considered. The formulation of these approaches and their successful preliminary validation is presented in details.
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U2 - 10.2514/6.2013-1772
DO - 10.2514/6.2013-1772
M3 - Conference contribution
AN - SCOPUS:84880813942
SN - 9781624102233
T3 - 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
BT - 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 8 April 2013 through 11 April 2013
ER -