scholarly journals Характер деформаций на границе раздела упругих сред при условии скольжения

2018 ◽  
Vol 44 (9) ◽  
pp. 88
Author(s):  
Н.В. Чертова ◽  
Ю.В. Гриняев
Keyword(s):  
Wave Propagation ◽  
Incidence Angle ◽  
Contact Condition ◽  
Elastic Media ◽  
Transverse Waves ◽  
Distortion Tensor ◽  
Elastic Distortion ◽  
Deformation Modes ◽  
Wave Incidence Angle ◽  
Wave Incidence

AbstractFresnel coefficients obtained when solving the problem of wave propagation through the interface of two elastic media and expressions for components of the elastic-distortion tensor allow one to study the character of dynamic deformations at the interface. Deformation modes different from zero at the interface of the elastic media under the slip-contact condition have been determined. Dependences of deformation amplitudes at the interface on the wave incidence angle and parameters of the adjacent media for incident longitudinal and transverse waves have been constructed and analyzed.

Influence of Plane-Wave Incidence Angle on Whole Body and Local Exposure at 2100 MHz

2011 ◽  
Vol 53 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Emmanuelle Conil ◽  
Abdelhamid Hadjem ◽  
Azeddine Gati ◽  
Man-Fai Wong ◽  
Joe Wiart
Keyword(s):  
Plane Wave ◽  
Incidence Angle ◽  
Whole Body ◽  
Local Exposure ◽  
Wave Incidence Angle ◽  
Wave Incidence ◽  
Plane Wave Incidence

Further experiments on transition to Mach reflexion

1979 ◽  
Vol 94 (3) ◽  
pp. 541-559 ◽  
Author(s):  
L. F. Henderson ◽  
A. Lozzi
Keyword(s):  
Shock Wave ◽  
Incidence Angle ◽  
Real Gas ◽  
Specific Heats ◽  
Real Gas Effects ◽  
Weak Shocks ◽  
Wave Incidence Angle ◽  
Wave Incidence ◽  
Theory And Experiment ◽  
Mach Reflexion

Our 1975 paper reported the results of experiments on shock reflexion in a wind tunnel and a shock tube; further results are presented here. For strong shocks it is shown that transition to Mach reflexion takes place continuously at the shock wave incidence angle ω0 corresponding to the normal shock point ω0 = ωN, unless the downstream boundaries form a throat. In this event transition can be promoted anywhere within the range ω0 [les ] ωN, and it is even possible to suppress regular reflexion altogether! However when ω0 < ωN the transition is discontinuous and accompanied by hysteresis. Again for strong shocks evidence is presented which suggests that the famous persistence of regular reflexion beyond the ωN point ω0 > ωN is spurious. For weak shocks the transition condition is not known but it is found that even for regular reflexion a marked discrepancy between theory and experiment develops as the shocks become progressively weaker. Also when weak shocks diffract over single concave corners there is a somewhat surprising discontinuity in the regular reflexion range. It seems that none of these phenomena can be adequately explained by real gas effects such as viscosity and variation of specific heats.

scholarly journals Assessment of the Power Output of a Two-Array Clustered WEC Farm Using a BEM Solver Coupling and a Wave-Propagation Model

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2907 ◽  
Author(s):  
Philip Balitsky ◽  
Gael Verao Fernandez ◽  
Vasiliki Stratigaki ◽  
Peter Troch
Keyword(s):  
Wave Propagation ◽  
Wave Field ◽  
Wave Energy ◽  
Power Output ◽  
Incidence Angle ◽  
Separation Distance ◽  
Propagation Model ◽  
Irregular Waves ◽  
Wave Incidence ◽  
Wave Propagation Model

One of the key challenges in designing a Wave Energy Converter (WEC) farm is geometrical layout, as WECs hydrodynamically interact with one another. WEC positioning impacts both the power output of a given wave-energy project and any potential effects on the surrounding areas. The WEC farm developer must seek to optimize WEC positioning to maximize power output while minimizing capital cost and any potential deleterious effects on the surrounding area. A number of recent studies have shown that a potential solution is placing WECs in dense arrays of several WECs with space between individual arrays for navigation. This innovative arrangement can also be used to reduce mooring and cabling costs. In this paper, we apply a novel one-way coupling method between the NEMOH BEM model and the MILDwave wave-propagation model to investigate the influence of WEC array separation distance on the power output and the surrounding wave field between two densely packed WEC arrays in a farm. An iterative method of applying the presented one-way coupling to interacting WEC arrays is used to compute the wave field in a complete WEC farm and to calculate its power output. The notion of WEC array ‘independence’ in a farm from a hydrodynamic point of view is discussed. The farm is modeled for regular and irregular waves for a number of wave periods, wave incidence angles, and various WEC array separation distances. We found strong dependency of the power output on the wave period and the wave incidence angle for regular waves at short WEC array–array separation distances. For irregular wave operational conditions, a large majority of WEC array configurations within a WEC farm were found to be hydrodynamically ‘independent’.

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