Calculation of Rigid Body Mass Properties of Flexible Structures
Experimental measurement of rigid body mass properties, specifically pitch inertia, of aircraft is becoming increasingly important for flutter analysis. This paper proposes a methodology for calculating rigid body inertia properties when the flexible modes of an aircraft are coupled to some degree with their corresponding rigid body modes, i.e. the rigid body modes are not fully rigid. The methodology will be demonstrated on a simple analysis model of a plate-like structure where the rigid body and primary flexible structural modes are coupled.
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- 1.Toivola, J., and O. Nuutila, “Comparison of Three Methods for Determining Rigid Body Inertia Properties from Frequency Response Functions,” Proceedings of the 11th International Modal Analysis Conference, Kissimmee, Florida, 1993.Google Scholar
- 2.Mangus, J., C. Passerello, C. VanKarsen, “Estimating Rigid Body Properties from Force Reaction Measurements,” Proceedings of the 11th International Modal Analysis Conference, Kissimmee, Florida, 1993.Google Scholar
- 3.Stebbins, M. D. Brown, “Rigid Body Inertia Property Estimation Using a Six-Axis Load Cell,” Proceedings of the 16th international Modal Analysis Conference, Santa Barbara, California, 1998.Google Scholar
- 4.Schedlinski, Carsten, and Michael Link, “On the Identification of Rigid Body Properties of An Elastic System,” Proceedings of the 15th International Modal Analysis Conference, Orlando, Florida, 1997.Google Scholar
- 5.Whitter, M., “Rigid Body Inertia Property Estimation Using the Dynamic Inertia Method,” Masters Thesis, Department of Mechanical Engineering of the College of Engineering, University of Cincinnati, 2000.Google Scholar
- 6.Lazor, D., “Considerations For Using The Dynamic Inertia Method In Estimating Rigid Body Inertia Property,” Masters Thesis, Department of Mechanical Engineering of the College of Engineering, University of Cincinnati, 2004.Google Scholar
- 7.Tuttle, R., T. Cole, and J. Lollock, “An Automated Method for Identification of Efficient Measurement Degrees-of-Freedom For Mode Survey Testing,” 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference, Austin, Texas, 2005.Google Scholar
- 8.Stabb, M., and P. Blelloch, “A Genetic Algorithm For Optimally Selecting Accelerometer Locations,” 13th International Modal Analysis Conference, Nashville, Tennessee, 1995.Google Scholar