how to apply dynamic ElementalLoad on a 2d rectangular plane

[yaqiang.jiang]

assume use 4 node quadrilateral element

the distributed load information is read from an input file with the following format:

time x y load
1 0 0 500
1 0 0.5 250
1 0 1 600
....................

The above data is given arbitarily,just for clarification.
The location for each load is exactly the same as the nodal coordinates. Since it's distributed load whereas that is given in a discretized form,I need to make a linear approximation by using the two values at the the nodes.


My question is ,which object should be responsible for reading the external file,the TimeSeries object? And which object should take care of the calculation of linear approximation? Do I need to create a subclass to do this job?