Filters








77 Hits in 16.1 sec

Review of pipeline span analysis

Abdulhakim Adeoye Shittu, Fuat Kara, Ahmed Aliyu, Obinna Unaeze
2019 World Journal of Engineering  
A case study of the preliminary design of a typical 48 inches Pipeline has been presented in this work to demonstrate the use of the free span analysis tool, DNV RP F105.  ...  Please refer to any applicable publisher terms of use. 2 fluid structure interaction problem as there is no consolidated procedure for its analysis.  ...  (Kapuria, Salpekar, & Sengupta, 1999) , presented an analytical solution for fatigue response resulting from free spanning submarine pipeline cross flow vibration on semi-infinite elastic soil beds supports  ... 
doi:10.1108/wje-09-2017-0296 fatcat:54g6glb7zbe3bnomciu3ewqk5y

Wind-structure interaction simulations of ovalling vibrations in silo groups

Jeroen Hillewaere, Joris Degroote, Geert Lombaert, Jan Vierendeels, Geert Degrande
2015 Journal of Fluids and Structures  
Chapter 4 starts by presenting the methodology for computational structural analysis by means of the FE method.  ...  Such self-excited vibrations occur when a structure in wind or fluid flow is deflected or moved first, e.g. by some external aerodynamic force.  ... 
doi:10.1016/j.jfluidstructs.2015.09.013 fatcat:24mbwcb77nggxapzwgct3cbtiq

Parallel finite element modeling of earthquake ground response and liquefaction

Jinchi Lu, Jun Peng, Ahmed Elgamal, Zhaohui Yang, Kincho H. Law
2004 Earthquake Engineering and Engineering Vibration  
Nikishkov et al. (1998) developed a semi-implicit parallel FE code ITAS3D using the domain decomposition method and a direct solver for an IBM SP2 computer.  ...  In this soil-pile interaction model, a 3x3 pile group is embedded in a submerged mild infinite ground slope with an effective inclination angle of about 4° while subjected to strong base shaking.  ...  Appendix B Figures of Wharf Simulation Results Appendix B Figures of Wharf Simulation Results This appendix lists figures of the results for the wharf simulations discussed in Chapter 7.  ... 
doi:10.1007/bf02668848 fatcat:unurcxrwqvehhdfahnqsnmxbbu

Dynamic behaviour of an axially moving plate undergoing small cylindrical deformation submerged in axially flowing ideal fluid

N. Banichuk, J. Jeronen, P. Neittaanmäki, T. Tuovinen
2011 Journal of Fluids and Structures  
In the two-dimensional model thus set up, the aerodynamic reaction is found analytically as a functional of the cylindrical displacement, using the techniques of complex analysis.  ...  Transverse displacement of the plate (assumed cylindrical), is described by an integrodifferential equation that includes a local inertia term, Coriolis and centrifugal forces, the aerodynamic reaction  ...  Acknowledgement: This research was supported by the MASI Tekes Technology Programme and the Ellen and Artturi Nyyssönen Foundation (EANS).  ... 
doi:10.1016/j.jfluidstructs.2011.07.004 fatcat:7a4ygma2tbbwhazdfebmrcuege

State of the art in wind turbine aerodynamics and aeroelasticity

M.O.L. Hansen, J.N. Sørensen, S. Voutsinas, N. Sørensen, H.Aa. Madsen
2006 Progress in Aerospace Sciences  
Finally, the coupling between the aerodynamic and structural modelling is shown in terms of possible instabilities and some examples. r  ...  In between is explained some methods of intermediate complexity such as vortex and panel methods. Also the different approaches to structural modelling of wind turbines are addressed.  ...  Finally, one of the latest trends is to couple NS solvers to structural codes to perform full elastic computations of wind turbine rotors.  ... 
doi:10.1016/j.paerosci.2006.10.002 fatcat:5y4khyztarbsrf7cbe4f3zsih4

Continuous Open Access Special Issue "Aircraft Design": Number 2 / 2020 [article]

Dieter Scholz
2020 Zenodo  
As such, the Special Issue "Aircraft Design" can be a home for all those working in the field who regret the absence of an aircraft design journal. SI-2/2020 contains seven papers; an Editorial: 1.)  ...  Activities in the past showed that aircraft design may be a field too small to justify its own (subscription-based) journal. A continuous open access special issue may fill the gap.  ...  Acknowledgments: The presented work is part of the electro-impulse de-icing system for aircraft, which is funded by State Grid Corporation of China.  ... 
doi:10.5281/zenodo.4624993 fatcat:vkm2umjhcbekzba4x6rbt22pla

The neural bases of normalising for accented speech: A repetition suppression functional magnetic resonance imaging study

Patti Adank, Peter Hagoort
2008 Journal of the Acoustical Society of America  
Where the flap allophone of "t" and "d" is expected in American English, one frequently sees an approximant-like or even vocalic pattern, rather than a clear flap.  ...  Degree of intensity dip has the strongest effect, with a minimal dip in intensity more likely to be perceived as 'kneel' and a strong dip in intensity more likely to be perceived as 'needle. ' The results  ...  The presented FE model consists of two coupled domains: A fluid domain representing the air, and a structural domain representing the VFs.  ... 
doi:10.1121/1.2934685 fatcat:qqmjcl5gjzcj7kssv2pi6efwti

Neural network modeling of a dolphin's sonar discrimination capabilities

Lars N. Andersen, A. René Rasmussen, Whitlow W. L. Au, Paul E. Nachtigall, Herbert Roitblat
1994 Journal of the Acoustical Society of America  
The sound field scattered by a smooth thin elastic shell immersed in fluid arises largely from specular reflection and acoustic-membrane coupling, unless both source and observer are located near or on  ...  We describe the vibration of a submerged elastic solid within a statistical energy analysis (SEA) framework.  ...  Further, modes of submerged structures do not form a complete set, and the energy of oscillation in a fluid/solid mode is often irretrievable, independent of the coupling in the system.  ... 
doi:10.1121/1.410770 fatcat:ioiiov6bmjdi7kiflait5dhdfe

Neural network modeling of a dolphin's sonar discrimination capabilities

Whitlow W. L. Au, Lars N. Andersen, A. René Rasmussen, Herbert L. Roitblat, Paul E. Nachtigall
1995 Journal of the Acoustical Society of America  
The sound field scattered by a smooth thin elastic shell immersed in fluid arises largely from specular reflection and acoustic-membrane coupling, unless both source and observer are located near or on  ...  We describe the vibration of a submerged elastic solid within a statistical energy analysis (SEA) framework.  ...  Further, modes of submerged structures do not form a complete set, and the energy of oscillation in a fluid/solid mode is often irretrievable, independent of the coupling in the system.  ... 
doi:10.1121/1.413700 pmid:7608403 fatcat:m3nunzs4wfflhfl27n4shdn2n4

Fine‐structure processing, frequency selectivity and speech perception in hearing‐impaired listeners

Olaf Strelcyk, Torsten Dau
2008 Journal of the Acoustical Society of America  
Where the flap allophone of "t" and "d" is expected in American English, one frequently sees an approximant-like or even vocalic pattern, rather than a clear flap.  ...  Degree of intensity dip has the strongest effect, with a minimal dip in intensity more likely to be perceived as 'kneel' and a strong dip in intensity more likely to be perceived as 'needle. ' The results  ...  The presented FE model consists of two coupled domains: A fluid domain representing the air, and a structural domain representing the VFs.  ... 
doi:10.1121/1.2935148 fatcat:nqyyia5pubamnhqgonegghrudm

Speaker comfort and increase of voice level in lecture rooms

Jonas Brunskog, Anders C. Gade, Gaspar Payà Bellester, Lilian Reig Calbo
2008 Journal of the Acoustical Society of America  
Where the flap allophone of "t" and "d" is expected in American English, one frequently sees an approximant-like or even vocalic pattern, rather than a clear flap.  ...  Degree of intensity dip has the strongest effect, with a minimal dip in intensity more likely to be perceived as 'kneel' and a strong dip in intensity more likely to be perceived as 'needle. ' The results  ...  The presented FE model consists of two coupled domains: A fluid domain representing the air, and a structural domain representing the VFs.  ... 
doi:10.1121/1.2934367 fatcat:xr6gp4ldo5bylnxytx2iumrdmi

Predicting and auralizing acoustics in classrooms

Claus Lynge Christensen
2005 Journal of the Acoustical Society of America  
A complicating feature of fluid-structure interaction problems is the non-local or long-range effect of the fluid loading acting on a structure vibrating in response to time-harmonic loading while submerged  ...  In the LGH reformulation, an infinite order operator that embodies both the structural modes and the evanescent component of the fluid loading governs the equivalent smooth global problem.  ...  Rigid and empty elastic shells submerged in a heavy acoustic fluid and subjected to harmonic excitation were considered.  ... 
doi:10.1121/1.4787358 fatcat:xtcgzi3xrnay3eyww5uafbhtgy

Comparison of procedures for determination of acoustic nonlinearity of some inhomogeneous materials

L. Bjørnø
1983 Journal of the Acoustical Society of America  
We model the downhole environment by an infinite fluid-filled cylinder surrounded by an infinite solid formation.  ...  Thus, modeling this submerged structure by the finite element method requires a large number of fluid elements, when the radiation boundary condition is represented by an outgoing spherical (monopolar)  ...  The method can be extended to a semi-infinite fluid-rifled crack in an elastic layer.  ... 
doi:10.1121/1.2020879 fatcat:eid6pixobjetzhkfpo6h2okzua

Spherical near field acoustic holography with microphones on a rigid sphere

Finn Jacobsen, Jo/rgen Hald, Efrén Fernandez, Guillermo Moreno
2008 Journal of the Acoustical Society of America  
In the present paper technical aspects of the experiments and the data analysis will be illustrated. The principal conclusions were as follows: 1.  ...  A grouping of the churches by typology was found by analysing the reverberation times; 3.  ...  A finite element analysis of acoustic radiation in an infinite lined guide with mean flow is studied.  ... 
doi:10.1121/1.2934035 fatcat:57w2rziyfvcmnnyzsxlgg43qxa

Parameter survey of a rib stiffened wooden floor using sinus modes model

Lars‐Göran Sjökvist, Jonas Brunskog, Finn Jacobsen
2008 Journal of the Acoustical Society of America  
In the present paper technical aspects of the experiments and the data analysis will be illustrated. The principal conclusions were as follows: 1.  ...  A grouping of the churches by typology was found by analysing the reverberation times; 3.  ...  A finite element analysis of acoustic radiation in an infinite lined guide with mean flow is studied.  ... 
doi:10.1121/1.2933934 fatcat:fmeouf2iynctnculdxzvoqb4iu
« Previous Showing results 1 — 15 out of 77 results