A general modeling method, the so-called Spectro-Geometric Method (SGM), is discussedfor the vibroacousticanalysis of complex systems which are composed of a number of familiar constituent componentsin the forms of beams, plates, shells, acoustic spaces, etc.The coupling conditions between any two components are generally described in terms of continuous, partial or discrete joints with arbitrary characteristic parameters, thus allowing adequately modeling mostcoupling mechanisms encountered in industrial applications. The solution variable(s) on each component plate are analytically expressed as accelerated Fourier series expansions and the expansion coefficients are considered as the generalized coordinates to be determined using the Rayleigh-Ritz technique. The SGM model is essentially a parametric and meshless (or grid-free)modeling of complex vibroacoustic systems, and is more suitable for sensitivity studies and design optimization. Of equal importance, it can be easily used to obtain the results of statistical significance through properly taking into account model uncertainties and engineering and manufacturing errors. This method does not involve any artificial assumptions or intermediate/derivedvariables. The accuracy and reliability of the present model are demonstrated through numerical examples.

Dr. Wenlong Li is currently the Chairman and President of Advanced Information Services （AIS） company. His experience includes: Associate Professor of Mechanical Engineering at Wayne State University; Associate Professor of Mechanical Engineering at Mississippi State University, Principal Engineer with United Technologies Research Center, and Technical Specialist with Case Corporation. Dr. Li has published approximately 150 technical papers and holds 9 U.S. Patents.He is Editor-in-Chief of Open Journal of Acoustics, and Editorial Board memberof Journal of Vibration Analysis, Measurement, and Control, Advances in Applied Acoustics,ISRN Applied Mathematics, and so on. Dr. Li is the Co-Chair of Prediction and Modeling Techniques Committee of INCE, andalso serves on the Structural Vibration and Acoustics Committee of Acoustical Society of America, and Experimental and Instrumentation Techniques Committee of INCE. He is the session co-organizers/chairs of many international Conferences (Noise-Con, ASA, Inter-Noise, etc.), and an active reviewer of dozens of technical journals.