Linear dynamic finite element analysis can be considered very reliable today for the design of aircraft engine components. Unfortunately, when these individual components are built into assemblies, the level of confidence in the results is reduced since the joints in the real structure introduce nonlinearity that cannot be reproduced with a linear model. Certain types of nonlinear joints in an aircraft engine, such as underplatform dampers and blade roots, have been investigated in great detail in the past, and their design and impact on the dynamic response of the engine is now well understood. With this increased confidence in the nonlinear analysis, the focus of research now moves towards other joint types of the engine that must be included in an analysis to allow an accurate prediction of the engine behavior. One such joint is the bolted flange, which is present in many forms on an aircraft engine. Its main use is the connection of different casing components to provide the structural support and gas tightness to the engine. This flange type is known to have a strong influence on the dynamics of the engine carcase. A detailed understanding of the nonlinear mechanisms at the contact is required to generate reliable models and this has been achieved through a combination of an existing nonlinear analysis capability and an experimental technique to accurately measure the nonlinear damping behavior of the flange. Initial results showed that the model could reproduce the correct characteristics of flange behavior, but the quantitative comparison was poor. From further experimental and analytical investigations it was identified that the quality of the flange model is critically dependent on two aspects: the steady stress/load distribution across the joint and the number and distribution of nonlinear elements. An improved modeling approach was developed that led to a good correlation with the experimental results and a good understanding of the underlying nonlinear mechanisms at the flange interface.
Skip Nav Destination
Article navigation
December 2013
Research-Article
Modeling and Validation of the Nonlinear Dynamic Behavior of Bolted Flange Joints
J. S. Green
J. S. Green
Search for other works by this author on:
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 28, 2013; final manuscript received July 3, 2013; published online September 20, 2013. Editor: David Wisler.
J. Eng. Gas Turbines Power. Dec 2013, 135(12): 122504 (8 pages)
Published Online: September 20, 2013
Article history
Received:
June 28, 2013
Revision Received:
July 3, 2013
Citation
Schwingshackl, C. W., Di Maio, D., Sever, I., and Green, J. S. (September 20, 2013). "Modeling and Validation of the Nonlinear Dynamic Behavior of Bolted Flange Joints." ASME. J. Eng. Gas Turbines Power. December 2013; 135(12): 122504. https://doi.org/10.1115/1.4025076
Download citation file:
Get Email Alerts
Gas Turbine's Role in Energy Transition
J. Eng. Gas Turbines Power (October 2024)
Analysis of In-Cylinder Flow in a Small-Bore Spark-Ignition Engine Using Computational Fluid Dynamics Simulations and Zero-Dimensional-Based Modeling
J. Eng. Gas Turbines Power (October 2024)
A Multistage Nonlinear Method for Aeroengine Health Parameter Estimation Based on Adjacent Operating Points
J. Eng. Gas Turbines Power (October 2024)
The Effect of Swirl Number on Lean Blow Out Limits of Lean Direct Injection Combustors
J. Eng. Gas Turbines Power (October 2024)
Related Articles
An Improved Dynamic Modeling Approach of Aerostatic Thrust Bearing Considering Frequency-Varying Stiffness and Damping of Air Film
J. Tribol (August,2022)
On the Effect of External Bending Loads in Bolted Flange Joints
J. Pressure Vessel Technol (April,2009)
Effect of Bolt Spacing on the Circumferential Distribution of the Gasket Contact Stress in Bolted Flange Joints
J. Pressure Vessel Technol (August,2011)
Dynamics of a Multibody Mechanical System With Lubricated Long Journal Bearings
J. Mech. Des (May,2005)
Related Chapters
Pipe Flange Leakage and Stress
Applying the ASME Codes: Plant Piping & Pressure Vessels (Mister Mech Mentor, Vol. 2)
Background Information
Guidebook for the Design of ASME Section VIII Pressure Vessels, Third Edition
Openings
Guidebook for the Design of ASME Section VIII Pressure Vessels, Third Edition