... is stationary and ergodic. After having defined the acoustic sources, the pressure sound field, and then, the dynamic response of the launch vehicle are computed in the time domain. But, at the end, the launch vehicle dynamic response has to be expressed in terms of spectral density. Inverse problems arise...

... (position and size) solving what is called an inverse problem. In this work, such an inverse problem has been solved by the use of the classical optimization technique of minimizing the least square criterion applied to the closed-form expression for the frequencies obtained through the perturbation method...

...C. C. Lin; C. C. Cheng A methodology to synthesize a predesignated acoustic response using a structure driven by multiple induced-strain actuators, e.g., piezoelectric (PZT) patches, is presented. The proposed approach of solving the inverse problem of structural acoustics, e.g., how to produce...

... 03 2006 structural acoustics vibrations inverse problems porous materials Fourier transforms porous media tunnel moving load Biot’s theory the Fourier transformation Recently, considerable efforts have been devoted to the problem of the interaction between high-speed...

... continuous beam and the car was modeled as a vehicle model with two-axle loads. A number of strain gauges were adhered to the bottom surface of the beam to measure the bending moment responses. Using measured bending moment responses as an input, the corresponding inverse problem was solved to identify...

... – 248 . Trujillo , D. M. , and Busby , H. R. , 1997 , Practical Inverse Analysis in Engineering , CRC Press , Boca Roton . Carlos Santamarina , J. , and Fratta , D. , 1998 , Introduction to Discrete Signals and Inverse Problems in Civil Engineering , ASCE , Reston...

... series approximation, the inverse problem is modeled as a linear equation system and solved iteratively using truncated SVD technique. Numerical simulations are performed to verify the effectiveness of the proposed method with different support conditions, measurement noise, and sensor sparsity...

... and damping nonlinearities. By comparing embedded sensitivity functions with finite difference frequency response sensitivities, which incorporate the amplitude-dependent behavior of mechanical nonlinearities, models can be determined using an inverse problem that uses system sensitivity to estimate...

...L. Starek; D. J. Inman, Fellow ASME This paper summarizes the authors’ previous efforts on solving inverse eigenvalue problems for linear vibrating systems described by a vector differential equations with constant coefficient matrices and nonproportional damping. The inverse problem of interest...

.... Associate Editor: Chin An Tan. 01 April 2002 01 Oct 2003 04 05 2004 structural acoustics quadratic programming nondestructive testing modal analysis vibrations inverse problems As it often occurs in engineering design, a prototype or an existing structure may show...

.... Dynamic behavior of the bridge deck is analyzed by the orthotropic plate theory and mode superposition technique. Like all inverse problems, this identification is an ill-conditioned problem, and a regularization technique is employed to stabilize the computations. The identified loads moving at different...

... and adaptive 12 algorithms. active noise control Fourier series Laplace transforms inverse problems acoustic wave transmission resonance 01 Dec 1999 01 Jan 2001 Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION...

... 2000 01 Dec 2000 artificial satellites inverse problems vibrations dynamic testing time-domain analysis During the course of the Mir-Shuttle program, the structural integrity of Russia’s Mir Space Station, pictured in Fig. 1 , was a major concern due to Mir’s longevity...

... and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received July 2000; revised Nov. 2000. Associate Editor: M. I. Friswell. 01 July 2000 01 Nov 2000 time-domain analysis force vibrations torque space vehicles inverse problems The estimation...