×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

get right values in drop test simulation usinf abaqus

get right values in drop test simulation usinf abaqus

get right values in drop test simulation usinf abaqus

(OP)
Hi all:

I'm trying to simulate a drop test of a structure from certain height. I entered all information needed for running the simulation. when I looked for the results in history, I found that the C.G. acceleration graph started from zero value. As the drop test is of free fall object type, it should start from -9.81 m/s^2 and continue constant up to the moment when the structure hits the ground. in the assembly I defined the mass at the C.G. of the assembly along with the mass moment of inertia. Also, I fixed the ground on which the structure impacts. I tried to define gravitational acceleration in y direction (negative= downward) but it increased the kinetic energy instead of decreasing it which violated the conversation of energy law.
Can anyone help with how to fix this problem.

Regards,

Mofy

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources