[amol wayse]

I AM USING LINEAR SPRING FOR MY OFFSHORE STRUCTURES , I WANT TO KNOW THAT WHAT BOUNDARY CONDITION IS REQUIRED .EITHER WE HAVE TO MAKE A DOMAIN UP TO THE SEA BED OR WE CAN MAKE UP TO SOME HEIGHT BELOW THE STRUCTURE.AND IN THE SPRING PROPERTIES WE HAVE TO GIVE BOTH THE SPRING COEFFICIENT AND EQ.LENGTH (Ls) OR WE CAN GAVE ANY ONE OF THEM .
IF ANY BODY HAVING SOME GUIDE LINES FOR ATTACHMENT OF SPRING THEN IT WILL BE A GREAT HELP .MY OFFSHORE STRUCTURE IS A TENSION LEG PLATFORM (TLP).