Hello everyone
My name is Sara from Italy, I am very new to the Sacs, could you please help me
First of all; after assigning all the member sections in order to perform static analysis, shall I calculate all the section's self-weight by myself and then impose it as distributed dead loads on the structure or SACS automatically calculates the weight of sections and consider them as self-weight of the structure?
secondly, when I do not impose any kind of dead load on the structure, in TOW analysis for inertia analysis and calculating roll, pitch,heave there will be nothing !!! so I wonder that must impose the self-weight of the structure as a distributed load in order have inertia forces. Am I right or wrong?
thirdly, what is the sequence for transportation analysis I mean: firstly, I created my model, then I generated TOW analysis, and thirdly members check by means of static analysis. am I right?
Please guide me, I urgently need your help
Thank you in advance
Sara
Hi Sara,
Nice to meet you. Here is the answer in the order they posed.
1. SACS can calculate self weights of structural elements, but they are not automatically considered. I mean, you need to let SACS know you want to include the self-weight effect for the stiffness analysis. There are many ways. One of the ways is to generate a load case due to self-weight as a separate load case in Precede (Load ->Self Weight) then combine it with other load cases.
2. You mean you excluded the self-weight of a structure when generating inertial loading in your tow input file? If so, as you said, the resulting load cases could be zero if you do not have any user-defined weight properties or loads. It seems this is not what you want. Then, include the weight of modeled elements for the inertial loading. Check column 27 - 28 on the TOWOPT line.
3. I am not sure what you did. For your reference, there are many ways, but basically, you need a structural model and load cases to be solved. I mean you need the loads due to motion, self-weight, and other loads that you want to check with. These are basic ingredients of strength analysis during transportation.
Please let me know if I misunderstand your question.Thank you.
Best regards,Bitna
Answer Verified By: sara james