what axis suitable for multi structure?

- September 12, 2024 at 4:11 am
  
  nhanani4
  Subscriber
  
  Hi
  My resarch is about get the horizontal force connector for multi-module floating structure.
  The point I draw start at first module and axis at first module.
  It necesary the x-axis at the middle arrangement?
  it is effect the surge, heave motion of floating structure?
  because i get 6dof motion actual response so higher from other paper that i refer.
  this axis effect this below?
- September 13, 2024 at 1:23 pm
  
  saheed.yusuf
  Subscriber
  
  Hello,
  My research is similar to yours but I am having some issues with my model. Can you help me please
- September 13, 2024 at 2:20 pm
  
  Shuangxing Du
  Ansys Employee
  
  The requirements of the global coordinate system used by Aqwa are
  (1) its origin is on the mean water level.
  (2) the z-axis points upwards.
- October 3, 2024 at 1:40 am
  nhanani4
  Subscriber
  1. so the origin i put in the first module and my paper refer the origin at the middle module that do not effect the surge, heave ,etc result?
  2. it is correct way i want to find the heave result (structure position > actual response > global z)? or heave result is from (structure position > RAO based response > global z):?
  3. it correct if heave get the -4.9 m get negative? my height hexagon is 20m.