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How to change time step size during a transient analysis simulation

How to change time step size during a transient analysis simulation

How to change time step size during a transient analysis simulation

(OP)
Hi

I am doing a very simple transient mechanical analysis with the time stepping parameters as follows (See below).

I wish to change the size of the time step  (dt) from 0.01us  to 0.05 us when Timef  reaches 1.0us during the run!
Can  you suggest how to do this?

Regards
V

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Time Stepping Parameters!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

dt     = 0.01                             ! Time step size
idt    = dt                                 ! Initial time step size
twait  = 0.0                             ! Wait time before sim begins
timep  = 0.1                            ! Pulse duration
timem  = 5.0                           ! Time simulation continues after pulse
timef  = timem+timep+twait     ! Total simulation time
nt     = (timef-0.1*dt1)/dt1+1  ! number of time steps
ndt    = 10000



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