Setting constraint to erp
Altair Employeehello all
I am defining optimisation to reduce erp by topology optimisation. My objective is to find optimum material distribution to have low erp
my defination goes as
dconstraint:
Erp: upper bound > (Target values) ####
Volumefrac= upperbound 0.3 design volume
objective= minimize design volume
Loadstep = Modal frequency Response.
###For this setup I get error selected subcase not compatible with type of response while setting constraint on ERP
how do i set the erp as target value.
Regards
Pratik
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Altair EmployeeLoad step:
Modal Frequency response analysis
Response type:
ERP All freq
Dconstraints
erp : upperbound 0.2 , I am not able to set this.
#subcase not compatible with type of response
Altair EmployeePratik,
The following responses are supported for Topology optimization.
Mass
Volume
Volume or Mass Fraction
Center of Gravity
Moment of Inertia
Static Compliance
Static Displacement
Natural Frequency
von Mises Stress on Entire Model (only as constraint)
Buckling Factor (special case)
Frequency Response Displacement, Velocity, Acceleration
Temperature
Weighted Compliance
Weighted Frequency
Combined Compliance Index
Function
Altair EmployeeFunny it works at one instance and doesnt work in different instance although loadcase is same. I have sent you files through dropbox.
Altair EmployeeHello
It is due to bug , when creating loadstep from panel browser. create load step from Horizontal Panel.
regards
Pratik
Altair EmployeeHi Pratik,
That is a know issue.
Any how please check the compatible responses with topology optimization.
Hi Pratik,
could you please paste the exact error you get?