An energy finite element optimization process for reducing high-frequency vibration in large-scale structures

Abstract The energy finite element analysis (EFEA) offers an attractive alternative to the established statistical energy analysis (SEA) for simulating the vibration of large-scale structures. One of the main benefits of utilizing EFEA in a simulation-based design process is the capability to prescribe local damping properties on selected sections of the numerical model. Thus, it is possible to control the flow of power at certain locations of interest by modifying the damping distribution. In this paper an optimization process is presented. An EFEA solver is integrated with an optimization routine in order to optimize the distribution of damping over a large-scale structure. The formulation of the optimization process, the software implementation, and the validation of the developed optimization process are presented.

[1]  Phillip Eung-Ho Cho.  Energy flow analysis of coupled structures , 1993 .

[2]  Nickolas Vlahopoulos,et al.  Numerical Implementation, Validation, and Marine Applications of an Energy Finite Element Formulation , 1999 .

[3]  A C Nilsson,et al.  NOISE PREDICTION AND PREVENTION IN SHIPS , 1978 .

[4]  Robert J. Bernhard,et al.  Simple models of the energetics of transversely vibrating plates , 1995 .

[5]  Brian Campbell,et al.  Structural-Acoustic Analysis for the Prediction of Vehicle Body Acoustic Sensitivities , 1993 .

[6]  Jim Woodhouse.  An approach to the theoretical background of statistical energy analysis applied to structural vibration , 1981 .

[7]  Stephen A. Hambric.  Sensitivity Calculations for Broad-Band Acoustic Radiated Noise Design Optimization Problems , 1996 .

[8]  Kyung K. Choi,et al.  DESIGN SENSITIVITY ANALYSIS OF STRUCTURE-INDUCED NOISE AND VIBRATION , 1997 .

[9]  Kenneth A. Cunefare,et al.  Acoustic Design Sensitivity for Structural Radiators , 1992 .

[10]  Richard H. Lyon,et al.  In-plane Contribution to Structural Noise Transmission , 1986 .

[11]  Robert J. Bernhard,et al.  Sensitivity calculations for structural-acoustic EFEM predictions , 1998 .

[12]  Ashok D. Belegundu,et al.  Analytical Sensitivity of Acoustic Power Radiated from Plates , 1995 .

[13]  Xi Zhao,et al.  Basic Development of Hybrid Finite Element Method for Midfrequency Structural Vibrations , 1999 .

[14]  S. H. Sung,et al.  Power Flow Finite Element Analysis of Dynamic Systems: Basic Theory and Application to Beams , 1989 .

[15]  B Burkewitz,et al.  APPLICATION OF A LARGE-SCALE SEA MODEL TO A SHIP NOISE PROBLEM , 1994 .

[16]  Kazuo Umezaki,et al.  STUDY FOR APPLICATION OF THE STATISTICAL METHOD TO THE PREDICTION OF SHIP VIBRATION CHARACTERISTICS , 1976 .

[17]  M. J. A. M. De Regt.  Experiments on Sound Reducing Floors Including Visco-Elastic-Damping on Board a Rhine Cruise Vessel , 1986 .

[18]  Nickolas Vlahopoulos,et al.  Basic development of a hybrid finite element method for mid‐frequency computations of structural vibrations , 1999 .

[19]  Garret N. Vanderplaats,et al.  CONMIN: A FORTRAN program for constrained function minimization: User's manual , 1973 .

[20]  Garret N. Vanderplaats,et al.  Numerical optimization techniques for engineering design , 1999 .

[21]  B. E. Douglas.  Flexural Wave Damping in Ship Hulls, Decks and Bulkheads , 1986 .

[22]  John S. Lamancusa,et al.  Design optimization methods for rectangular panels with minimal sound radiation , 1992 .

[23]  R. J. Bernhard,et al.  Computation of acoustic shape design sensitivity using a boundary element method , 1992 .

[24]  J. H. Kane,et al.  A boundary element formulation for acoustic shape sensitivity analysis , 1991 .

[25]  V. R. Miller,et al.  Prediction of Aircraft Interior Noise Using the Statistical Energy Analysis Method , 1983 .

[26]  Robert S. Thomas,et al.  Implementing and improving statistical energy analysis models using quality technology , 1997 .

[27]  Leo K. H. Lu.  Optimum damping selection by statistical energy analysis , 1990 .

[28]  Oliver Marie Bouthier.  Energetics of vibrating systems , 1992 .

[29]  A. C. Nilsson,et al.  NOISE PREDICTION AND PREVENTION , 1986 .

[30]  J. P. Fernandez,et al.  Vibroacoustic Payload Environment Prediction System (VAPEPS): VAPEPS management center remote access guide , 1991 .