Seismic perturbation simulation

This operation sets transverse misalignements according to sinewaves of some chosen frequency and amplitude as a function of the longitudinal coordinate. The vertical oscillation may be different from the horizontal oscillation This operation only affects the tracking of particles and all operations that use tracking.

Input format 


SEISmic simulation............(up to 80 characters) 


xlambs axseis phixs 


ylambs ayseis phiys 


beginname endname

Parameter definitions

xlambs,ylambs $\parbox{10cm}{Wave length(in m) for x and y waves}$

axseis,ayseis $\parbox{10cm}{Amplitudes of the x and y waves}$

phixs,phiys $\parbox{10cm}{x and y phase shift of each wave.}$

beginname,endname $\parbox{8cm}{name of elements where the wave is to start and where it is to stop. Use unique names, markers preferably.}$