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		题名	作者	年代	出处	被引量
	1	Fluid Flow Simulation of the Influence of a Steady Magnetic Field on the Weld Pool Dynamics in Deep Penetration Laser Beam Welding of Aluminum显示文摘A multi-physics numerical model was developed to investigate the influence of a steady magnetic field during partial penetration keyhole laser beam welding of an aluminum plate in flat position.Three-dimensional heat transfer,fluid dynamics including phase transition and electromagnetic field partial differential equations were solved with the finite element differential equation solver COMSOL Multiphysics.The magnetic field was aligned perpendicularly to the welding direction.The main objective of these simulations was to estimate the critical value of the magnetic field needed to suppress convective flows in the weld pool during high-power(up to 20 kW)laser beam welding of aluminum alloys with up to 20 mm deep weld pool.It reveals that steady magnetic fields with corresponding Hartmann numbers Ha2-10~4based on the half-width of the weld pool can effectively suppress convective flows in the weld pool.Moreover,the typically occurring wineglass-shape of the weld cross section caused by thermo-capillary flow is weakened.	BACHMANN Marcel AVILOV Vjaceslav GUMENYUK Andrey RETHMEIER Michael	2012	Journal of Iron and Steel Research(International)2012，19，S1：	3
	2	Numerical simulation of full-penetration laser beam welding of thick aluminium plates with inductive support显示文摘	Marcel Bachmann Vjaceslav Avilov Andrey Gumenyuk Michael Rethmeier	2012	Journal of Physics D: Applied Physics2012，，3：	2
	3	Experimental and numerical investigation of an ele- ctromagnetic weld pool support system for high power laser beam welding of austenitic stainless steel显示文摘	Marcel Bachmann Vjaceslav Avilov Andrey Gumenyuk	2014	Journal of Ma- terials Processing Technology2014，，214：	1
	4	About the influence of a steady magnetic field on weld pool dynamics in partial penetration high power laser beam welding of thick aluminium parts显示文摘	Marcel Bachmann Vjaceslav Avilov Andrey Gumenyuk Michael Rethmeier	2013	International Journal of Heat and Mass Transfer2013，，：	1
	5	Investigation of Differently Modulated Optical Signals Transmission in HDWDM Systems显示文摘	Aleksejs Udalcovs Vjaceslavs Bobrovs Girts Ivanovs	2011	Computer Technology and Application2011，2，10：	0
	6	Simulation of an Inductive Weld Pool Support for Deep Penetration Laser Beam Welding of Metal Parts显示文摘A three-dimensional laminar steady state numerical model was used to investigate_the influence of an alternating current(ac)magnetic field during single pass high power laser beam keyhole welding of 20 mm thick aluminum.The three-dimensional heat transfer,fluid dynamics and electromagnetic field equations were solved with the commercial finite element package COMSOL Multiphysics.Dominant physical effects of the process were taken into account:Thermo-capillary(Marangoni)convection at the upper and lower weld pool surfaces,natural convection due to the gravity influence and the latent heat of solid-liquid phase transition.Simulations were conducted for several magnetic field strengths and it was found that the gravity drop-out associated with welding of thick plates due to the hydrostatic pressure can be prevented by the application of an ac magnetic field below the weld specimen of around 70 mT(rms)at an oscillation frequency of 450 Hz.The inductive support system allows for single-pass laser beam welding of thick aluminum plates.The flow pattern in the molten zone and the temperature distributions are significantly changed by the application of the electromagnetic forces in the weld pool.	BACHMANN Marcel AVILOV Vjaceslav GUMENYUK Andrey RETHMEIER Michael	2012	Journal of Iron and Steel Research(International)2012，19，S1：	0
	7	Theoretical study of all-optical RZ-OOK to NRZ-OOK format conversion in uniform FBG for mixed line-rate DWDM systems显示文摘In this work we study all-optical multi-channel return-to-zero(RZ)–on-off keying(OOK) to nonreturn-to-zero(NRZ)–OOK format conversion in single uniform fiber Bragg grating(FBG) for mixed line-rate dense wavelength-division multiplexing systems using mathematical simulations. Forty and 20 Gbit/s RZ–OOK signals with 33% and 50% duty cycles are converted to NRZ–OOK signals in single uniform FBG with 21% reflectivity.Impact of amplitude noise from FBG contrast profile on modulation format conversion efficiency is also studied.	Oskars Ozolins Vjaceslavs Bobrovs	2015	Chinese Optics Letters2015，13，6：	0

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