Pro-Mechanica Constraints

Dec 10, 2003 1 Replies

Hello,



I'm using Pro-Mechanica at present for the modelling of water storage tanks, as part of our engineering department's work on low-cost domestic rainwater harvesting.



Having made solid models of possible tank designs, I now want to apply suitable constraints for the FEA analysis. Ideally I would like to be able to constrain the base of the tank such that any displacement downwards would generate a resistive force that increased with displacement (probably linearly), but that any displacement upwards would not generate any resistive external force.



I seem to remember the old Pro-Engineer version of mechanica having a spring constraint option in the constraint dialogue box, but in Wildfire the options are now free, constrained, or specified displacement.



Does anyone have any advice?



Thanks,



Gwilym Gwilym


Yes - I finally found the time to look this up... The spring is an element in independent Wildfire Mechanica (not a constraint) you give it a stiffness under Properties.

In integrated mode you go to Model/Idealizations/Spring and put it in.

-D

Gwilym wrote:

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