- #1
seraphi
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I know this is really stupid and it looks like i haven't tried at all but i am genuinely confused about this so any guidance at all would help big time. so here is the question.
A steel bar, 70mm long is struck at one end by a heavy mass moving at 20m/s. The impact causes a compression wave to travel to the end of the bar whihc is kept fixeed. density of bar is 7900kg/m and E=200Gpa.
a)what are boundary consitions at the two ends.
b)construct a spreadsheet to solve problem using explicit FD scheme with 8 nodes. time step= 1E-6s. plot results for displacement w at times t=1E-5s and t=2E-5s.
I assume the boundary conditions to be 20 and 0 but the problem for me is what exactly do i program each cell to do.
A steel bar, 70mm long is struck at one end by a heavy mass moving at 20m/s. The impact causes a compression wave to travel to the end of the bar whihc is kept fixeed. density of bar is 7900kg/m and E=200Gpa.
a)what are boundary consitions at the two ends.
b)construct a spreadsheet to solve problem using explicit FD scheme with 8 nodes. time step= 1E-6s. plot results for displacement w at times t=1E-5s and t=2E-5s.
I assume the boundary conditions to be 20 and 0 but the problem for me is what exactly do i program each cell to do.
