load body in LSDyna interface

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

hi expert..

 

i am begginer in Hypermesh and Lsdyna interface.

 

now i am running for bus rollover structure analysis using hypermesh and LSDyna interface.

 

i already put all the boundary condition/material/properties/load body/contact and others.

 

for these im using unit mm/s/tonne and i also check for consistent unit all the time.

 

after calculation is complete.. the bus structure is not falling down but the model is going up and horizontally (likely fly away).. 

 

in my boundary condition, i put the load body in Y-direction and its pointing vertically.. my load body curve is

 

X; 0     y: 1

X; 2     y: 1

 

the gravitational accelaration is 9810 mm/s2 and time termination is 2s..

 

contact used: surface to surface/ single surface/ node to surface and rigiwalls planar. 

 

 

so what can i do to make the bus structure is falling down.??

 

 

hope somebody can help me.. image/emoticons/default_unsure.png' alt=':unsure:'>

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2014

    Hi Mahathir,

     

    can you change the direction of gravity and check if your are results are as intended?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2014

    hi prakash..

     

    before that i have put negative sign to the gravitational acceleration (-9810 mm/s2) but the result unchanged.  

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