Posted by: Damanpreet Singh
Issue regarding Hanger Predefined - 10/09/10 03:45 AM
Dear All,
While doing reverse engineering i found a peculiar problem regarding Hanger Predefined condition.
In the existing system, i changed one spring hanger by rigid restraint. After the Run i observed 10% Load variation.
Now the thing is if i predefine the spring hanger with existing spring hanger data. I found + 1000~2000 mm sustained displacement.
Please advise me in this issue.
Regards,
Damanpreet Singh
Posted by: Dave Diehl
Re: Issue regarding Hanger Predefined - 10/11/10 07:26 AM
Sounds like you did not specify the proper cold load for that pre-defined spring.
You give little information for going any further in diagnosis.
Posted by: Damanpreet Singh
Re: Issue regarding Hanger Predefined - 10/11/10 11:33 AM
Thanx for the reply Mr. Diehl,
The way i Predefined the Hanger Loads:
For Variable Spring Hanger:
1.Spring Rate
2. Theoretical Cold(Installed) Load
& for Constant Hanger: constant effort support load.
After followed the above procedure. Why i am getting huge sustain displacemnt.
Regards,
Damanpreet Singh
Posted by: Dave Diehl
Re: Issue regarding Hanger Predefined - 10/11/10 11:42 AM
Again, without your model and results, I can only guess.
Use F=kx; check your input; track these numbers through your output to identify the cause. I believe you will find the problem with the model or with yoru understanding of the program's operation. I don't doubt your abilities, it's just that I am confident in basic C2 operation.
Posted by: danb
Re: Issue regarding Hanger Predefined - 10/12/10 11:59 PM
To obtain + 1000 mm displacement in sustain, most likely you inserted a different magnitude of load (1000 times real load-maybe). Double check your units. It is also possible that in addition to have the nozzle disconected.
Best regards,
Posted by: Damanpreet Singh
Re: Issue regarding Hanger Predefined - 10/13/10 03:22 AM
Dear Sir,
Please refer attached file.
Regards,
Damanpreet Singh
Posted by: danb
Re: Issue regarding Hanger Predefined - 10/13/10 05:01 AM
When you specify 2 springs at location and you want to insert the Constant Effort Support Load, you have to insert the Load from 1 spring and not total load. Caesar will multiply this load by the number of springs.
Best regards,
Posted by: Damanpreet Singh
Re: Issue regarding Hanger Predefined - 10/13/10 05:07 AM
Thanx Sir,
Just now i observe the same. It solved my problem.
Regards,
Damanpreet Singh