Blade stress estimation during multiple vibratory modes

Kan Ni, X. Q. Wang, Marc Mignolet

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - Aug 15 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: Apr 8 2013Apr 11 2013

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityBoston, MA
Period4/8/134/11/13

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ASJC Scopus subject areas

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Ni, K., Wang, X. Q., & Mignolet, M. (2013). Blade stress estimation during multiple vibratory modes. In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [AIAA 2013-1772] (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference).