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Delaying time dependent loads

Posted 24.12.2016, 05:19 GMT-5 Studies & Solvers, Structural Mechanics Version 5.0 0 Replies

Matthew Blackwell
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I am carrying out a time-dependent analysis on a structure using the solid mechanics module and want to apply different loads at different points on the structure.

Each load takes the form of the Friedlander equation, so varies with time. I want each load to begin acting on the structure at a different time with respect to the total time.

i.e.
Level 1 - Load start time - 0.01ms
Level 2 - 0.012ms
Level 3 - 0.015ms
etc.

I have tried using a step function from 0 to 1 but this does not work because the loading function itself is a function of time (P=Ps*e(t/to)*(1-t/to)) so it means that when the step function is equal to 0 you lose the first part of the load equation, rather than it being shifted.

In short, I want loads to start at different times within the global time, but each one to start at t=0 on a local time.

Any ideas of how to achieve this would be appreciated. Thanks.
0 Replies Last Post 24.12.2016, 05:19 GMT-5
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