Need help in understanding load cases

[lokitkhemka]

I am going through the slope_stability_analysis_example_01 and I have questions about how the loads are defined

ts= modelSpace.newTimeSeries(name= 'ts', tsType= "path_time_ts")
ts.path= xc.Vector([0, 1])
ts.time= xc.Vector([0, 100])

lp0= modelSpace.newLoadPattern(name= '0')
modelSpace.setCurrentLoadPattern(lp0.name)
accel= xc.Vector([0,g])
for e in s1.elements:
    e.createInertiaLoad(accel)
modelSpace.addLoadCaseToDomain(lp0.name)

ts is applying a gradually increasing load starting from 0 to 1 (N or kN?) in +Y or '-Ydirection from time 0 to 100? Also, which nodes ists` applied to? All the nodes?

Thank you for your help.

[lcpt]

Hi, @lokitkhemka.

The time series object ts determines the factor that multiplies the loads in the load pattern (lp0). From the definition of its path, it returns a factor equal to zero when the pseudo-time is equal to zero and a factor equal to one when the pseudo-time is equal to 100. You can take a look at the examples in this directory to see how this works.

The inertia load is applied to the elements of s1 when the for loop is executed:

for e in s1.elements:
    e.createInertiaLoad(accel)

Just for reference (maybe other users want to know) the slope_stability_analysis_example_01.py can be found here.

[lokitkhemka]

Understood. Basically, the inertial load is increased from 0.0 * gamma to 1.0 * gamma in the time period of 100. Thank you so much.

[lcpt]

With pleasure.