Other Topics

Uncertainty Analysis and Propagation and Robust Design

JR Fonseca, MI Friswell & AW Lees, Efficient Robust Design via Monte Carlo Sample Reweighting. International Journal for Numerical Methods in Engineering, 69(11), March 2007, 2279-2301.

C Zang, MI Friswell & JE Mottershead, A Review of Robust Optimal Design and its Application in Dynamics. Computers & Structures, 83(4-5), January 2005, 315-326.

S Adhikari & MI Friswell, Random Matrix Eigenvalue Problems in Structural Dynamics. International Journal for Numerical Methods in Engineering, 69(3), January 2007, 562-591.

ZP Qiu, X Wang & MI Friswell, Eigenvalue Bounds of Structures with Uncertain-but-Bounded Parameters. Journal of Sound and Vibration, 282(1-2), April 2005, 297-312.

JR Fonseca, MI Friswell, JE Mottershead & AW Lees, Uncertainty Identification by the Maximum Likelihood Method. Special Issue of the Journal of Sound and Vibration on Uncertainty, 288(3), December 2005, 587-599.

Modal Testing and Experiment Design

Modal testing is the process of measuring the natural frequencies, damping ratios and mode shapes of a structure (the modal model). The process involves mounting the structure, exciting it in some way and then measuring the response at the required locations. Subsequent processing generates the frequency response functions (FRFs) of the structure and curve fitting algorithms calculate the modal model. Many aspects of this process are being investigated.

Stepped sine testing produces accurate FRFs at the expense of the time required to perform an experiment. Recursive identification of the FRF parameters is being considered to speed up the measurement process, while maintaining accuracy. The location of the transducers has a considerable impact on the quality of the modal model, and indeed important modes may be missed with poorly located transducers. Automating the choice of these locations using a finite element model of the structure can provide a valuable insight to suitable locations, especially when only a limited number of transducers are available.

JET Penny, MI Friswell & SD Garvey, Detecting Aliased Frequency Components in the Discrete Fourier Transform. Mechanical Systems and Signal Processing, 17(2), March 2003, 473-481.

SD Garvey, JET Penny & MI Friswell, Quantifying the Correlation Between Measured and Computed Mode Shapes. Journal of Vibration and Control, 2(2), May 1996, 123-144.

JET Penny, MI Friswell & SD Garvey, The Automatic Choice of Measurement Locations for Dynamic Tests. AIAA Journal, 32(2), February 1994, 407-414.

MI Friswell & JET Penny, Stepped Sine Testing using Recursive Estimation. Mechanical Systems and Signal Processing, 7(6), November 1993, 477-491.

MI Friswell & JET Penny, The Choice of Orthogonal Polynomials in the Rational Fraction Polynomial Method. Modal Analysis: The International Journal of Analytical and Experimental Modal Analysis, 8(3), July 1993, 257-262.

MI Friswell & JET Penny, Stepped Multisine Modal Testing using Phased Components. Mechanical Systems and Signal Processing, 4(2), March 1990, 145-156.

Last updated February 2009 by M I Friswell