Modal Analysis of Data from Synthetic Aperture Arrays in a Shallow Water Waveguide Using a Non Linear Multidimensional Parametric Method

1995 ◽  
pp. 329-334
Author(s):  
E. Parastates
Keyword(s):  
Shallow Water ◽  
Modal Analysis ◽  
Parametric Method ◽  
Synthetic Aperture ◽  
Non Linear ◽  
Aperture Arrays

Modal Mapping in Shallow Water Using Synthetic Aperture Horizontal Arrays

1998 ◽  
Author(s):  
George V. Frisk ◽  
Kyle M. Becker ◽  
James A. Doutt
Keyword(s):  
Shallow Water ◽  
Synthetic Aperture

Non-linear modal analysis for beams subjected to axial loads: Analytical and finite-element solutions

2008 ◽  
Vol 43 (6) ◽  
pp. 551-561 ◽  
Author(s):  
Carlos E.N. Mazzilli ◽  
César T. Sanches ◽  
Odulpho G.P. Baracho Neto ◽  
Marian Wiercigroch ◽  
Marko Keber
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Axial Loads ◽  
Non Linear

Powertrain Resilient Mounting Design Analysis

2018 ◽  
Author(s):  
Tigran Parikyan ◽  
Nikola Naranca ◽  
Jochen Neher
Keyword(s):  
Rigid Body ◽  
Modal Analysis ◽  
Frequency Domain ◽  
Static Analysis ◽  
Software Tool ◽  
Software Tools ◽  
Forced Response ◽  
Marine Engine ◽  
Linear Elastic ◽  
Non Linear

For efficient modeling of engine (or powertrain) supported by non-linear elastic mounts, a special methodology has been elaborated. Based on it, software tool has been developed to analyze the motion of rigid body and elastic mounts, which comprises of three modules: • Non-linear static analysis; • Modal analysis (undamped and damped); • Forced response (in frequency domain). Application example of a large V12 marine engine illustrates the suggested workflow. The results are verified against other software tools and validated by measurements.

Conditional Short-Crested Second Order Waves in Shallow Water and With Superimposed Current

2004 ◽  
Author(s):  
Jo̸rgen Juncher Jensen
Keyword(s):  
Shallow Water ◽  
Wave Spectrum ◽  
Ocean Waves ◽  
Offshore Structures ◽  
Second Order ◽  
Stokes Wave ◽  
Wave Crest ◽  
Wave Kinematics ◽  
Wave Approach ◽  
Non Linear

For bottom-supported offshore structures like oil drilling rigs and oil production platforms, a deterministic design wave approach is often applied using a regular non-linear Stokes’ wave. Thereby, the procedure accounts for non-linear effects in the wave loading but the randomness of the ocean waves is poorly represented, as the shape of the wave spectrum does not enter the wave kinematics. To overcome this problem and still keep the simplicity of a deterministic approach, Tromans, Anaturk and Hagemeijer (1991) suggested the use of a deterministic wave, defined as the expected linear Airy wave, given the value of the wave crest at a specific point in time or space. In the present paper a derivation of the expected second order short-crested wave riding on a uniform current is given. The analysis is based on the second order Sharma and Dean shallow water wave theory and the direction of the main wind direction can make any direction with the current. Numerical results showing the importance of the water depth, the directional spreading and the current on the conditional mean wave profile and the associated wave kinematics are presented. A discussion of the use of the conditional wave approach as design waves is given.

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