Standard earth gravity

- September 22, 2019 at 5:49 pm
  
  rahulranjan1995
  Subscriber
  
  How to add standard earth gravity in msup transient system?
- September 22, 2019 at 7:46 pm
  
  peteroznewman
  Subscriber
  
  You already have an acceleration load. Just add the acceleration due to gravity to that load.
- September 23, 2019 at 3:59 am
  
  rahulranjan1995
  Subscriber
  
  Hello Peteroznewman sir,
  
  I have one doubt, suppose I open static structural module and apply line pressure on a beam and then link transient structure module with static structure and apply acceleration over the beam. Then will the line pressure get overlap in transient structure module as well?
- September 23, 2019 at 1:02 pm
  
  peteroznewman
  Subscriber
  
  No.
  
  Just use Transient Structural, but use 3 time steps and turn off Time Integration in the first step when you apply the acceleration due to gravity.
  
  The transient load is applied in step 3 with Time Integration turned on.
  
  Here are more detailed instructions.
- September 23, 2019 at 2:18 pm
  
  rahulranjan1995
  Subscriber
  
  By going through your previous suggestions on another post of mine I tried working on perforated steel beam of I section using mid-surfacing but when I did modal analysis on that model the natural frequency of all the modes came out to be zero. Can you explain the reason?
- September 23, 2019 at 4:05 pm
  
  peteroznewman
  Subscriber
  
  You didn't add a Fixed Support to one end of the beam in Modal, which needs its own support unless you link the Solution cell of a Static Structural into the Setup cell of Modal in Workbench, then you are not allowed to add a Fixed Support to Modal.