hello,
i had analysed downcomers, the result shown that high load at water/lowerdrum middle saddle, iam attaching that model kindly give advice.

You had analysed ... or just modelled it in Caesar II ? Seems to me you have done no analysis. Is that not what you are paid for ?

Your file will not load. It generates fatal errors due to Config file problems.

i had analysed and checked the code stresses, those will be less than 40%.But load in ope case at middle saddle comes 16 tons

You should your questions in simple but grammatically correct English. Since your medium of study was English ( in engineering), this is what you should be able to do.

If I understand your question correctly, stresses in your system ( which load case?0 a are within 40% of the code allowable. However the operating condition load is 16T. This has to do with either restraint to thermal expansion or redistribution of dead weight load due to lifting of supports.

I have not seen your model but why don't you look into the problem based on these two aspects?

Regards

you are not getting my question i.e., i had check the stresses in sus and exp.
i know that high load due to exp is in upwards and you have to see my model otherwise you cannot understand my doubt.

it was due to lifting of end saddle, mid saddle getting higher load
what can i do?

Employ a stress engineer.

before answering my question first download the attachment and go through it.

You missed out the magic word ... please.

aha

OK, since you are such a nice chap .....

Your vessel support modelling is wrong. The temperature of dp 200-210 is wrong. But that 's not the cause of your big reactions.

The length of dp 120-130 is 415 (vessel centreline length whereas the other two supports are 657. Make dp 120-130 657, the large loads disappear. This is caused mainly by the extremely stiff elements that make up your vessel, and the rigid lengths you have modelled.

You should also have noted the massive MZ moment at dp110 .. it would bend any support structure.

That took me about ten minutes .... it's called analysis. Do try to remember that a pretty Caesar II model is only part of the job. Looking at the numbers and understanding what they mean is far more important.

thank you very much my friend............

You appear to have some sort of coding problem with the supports on your lower drum. The distribution on 110, 190, and 220 is quite crazy. For starters, the temperature on element 200-210 is wrong.

But, the bigger issue is that the three supports are not all the same length. Your middle and far sliding supports have 657mm and 323mm vertical rigids. The anchored end has 415mm and 185mm vertical rigids. This disparity is creating an internal fight between the supports. You need to determine which (if any) are correct and adjust the others to match.

Based on the coding of your drum as 830mm in diameter, I suspect the 415mm/185mm coding is the one you intended.

And, since I'm giving free consulting, I'll also say that your coding is quite sloppy. It is very hard to follow along as elements jump around all over the model. You should think about your coding strategy and mark up your ISO's before you start building a model.