摘要:

The present letter demonstrates an error in boundary conditions at a reflecting surface.

ISSN:0001-4966    

DOI:10.1121/1.1913175

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

In the above paper, characteristic beam vibration modes are used in Galerkin's method to determine the natural frequencies and mode shapes of flexural vibration of generally orthotropic rectangular plates. Three sets of edge conditions are considered: All edges simply supported; two parallel edges damped, the other two free; and a cantilever plate.

ISSN:0001-4966    

DOI:10.1121/1.1913176

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Recent research efforts are referenced in the present letter.

ISSN:0001-4966    

DOI:10.1121/1.1913177

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Forced longitudinal vibrations of a prismatic, slender bar with distributed quadratic damping and equivalent viscous damping are considered. The bar is free at one end and subjected to harmonic excitation at the other. The nonlinear differential equation with the velocity‐squared term is solved numerically by the method of characteristics. The linearized equation is solved by Laplace transforms and the solution is compared to that of the nonlinear system. The damping is linearized by equating the energies dissipated per cycle by the two types of damping. Frequency‐response curves, through the second natural mode, are given for several sets of the nonlinear and equivalent viscous damping coefficients.

ISSN:0001-4966    

DOI:10.1121/1.1913179

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Modified ray theory was originally intended to be valid in caustic regions where ordinary ray theory is invalid. The two theories are demonstrated here to be in good agreement at relatively large distances into the double arrival region adjacent to a typical convergence zone caustic.

ISSN:0001-4966    

DOI:10.1121/1.1913180

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

The study aims at prediction of the intensity of Aeolian sound created under water by an ocean current passing a wire or cable. Particular application is a mooring line of a deep‐sea taut‐moored buoy. The work is based on a paper by Phillips [J. Fluid Mech.1, 607–624 (1956)] but the difference in scale between sound waves in air and in water necessitates the extension of Phillips' equations into the acoustical nearfield. A brief outline of the theory and numerical values are given.

ISSN:0001-4966    

DOI:10.1121/1.1913181

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP

摘要:

Measurements of the two‐dimensional waveheight probability distribution of wind‐driven waves in a model tank suggest that the use of bivariate Gaussian statistics in acoustic scattering computational approximations may be much less realistic than assuming Gaussian behavior in only one dimension.

ISSN:0001-4966    

DOI:10.1121/1.1913182

出版商:Acoustical Society of America    

年代:1972

数据来源: AIP