priyankabhola

Members

12

Posts posted by priyankabhola

1. Model analysis

On 3/30/2020 at 3:16 PM, Nathan said:

Hi,

As Farouk said, V1 and V2 are respectively the lower and upper frequency bound.

For example, if you write V1=20 and V2=2000, then it will search for Natural Modes frequency only in this range [20,2000] (according to your unit system, generally Hz).

ND is to specify the number of roots (so of modal frequencies) you want.

Please find the table attached from EIGRL OptiStruct help. If you combine V2 and ND, it will only compute the minimum number of frequencies allowed by either V2 or ND.

Regards,

Nathan

thanks  a lot

2. Model analysis

On 3/28/2020 at 8:53 PM, Farouk Maaboudallah said:

Hi,

First, you are running Real Eigenvalues Analysis using Lanczos solver (EIGRL).

V1 and V2 mean the lower and upper bound of your frequency domain.

ND means the number of roots (number of eigenvalues) of the following equation :

(-w^2*M - K)*phi = 0

with w refers to the real eigenvalue and phi means the eigenvectors.

Cheers,

On 6/26/2019 at 6:41 AM, tinh said:

Yes, that is definition by vectors

Hi

need help...

want to apply load on local cordinate at specific angle.

Hello need help for apply load on local coordinate system at angle.

5. Model analysis

Hi,

i want to regarding model analysis card deatil EIGRL card .

what is meaning of V1, V2 ,ND.... when should i use  v1 and v2 .difference between v1 and v2. i saw some tutroial online someone use v1 some one use v2.  can you explain in detail.

Priyanka bhola

6. 1D beam shear stresses in torsion analysis

Hello ,

in case of bus structure for twisting analysis any boundary conditions available.

thanks

priyanka

7. contact master slave in optistruct

Hello,

Today i  run same file with modification as per error suggested by you in snapshot ..missing master element but still my vehicle not run properly.

regards

priyanka

8. contact master slave in optistruct

Hello,

actually reason for using linear static is time save i just want to check the total stress on floor for optimization first .

if it will behave ok and after that i want to go for non linear.

can you guide me or help for non linear for the same project.

boundary condition or deck setup.

or share some tutorial.

with regards

priyanka

9. contact master slave in optistruct

Hi,

i am doing analysisin optistruct

project detail as per following.

traget: i want to test strength for floor members . not only floor even all side walls of vehicles. can sastain the load.

problem: master --dummy weight in 3d mesh 37 ton. 2.) slave: load body mesh part. but master weight run out of load body .connect not work properly betwen body and dummny weight.weight goes out of side walls .please help.  i dont want to apply pressure or force because at a time it work either on floor or side wall of load body. i want dummy weight will work at a time all sides (floor side and front and rear wall)

file attached for ref.

With regards

priyanka

10. missing normal termination

Hello Guru,

ls dyna .k file attached for checking purpose.

Priyanka

11. missing normal termination

hi this is priyanka

please help me in rollover bus. i have done bus rollover project as per std in Ls dyna through Angular velocity .  what i did i calculate angular velocity. and unstable angle. for time saving purpose i rotate the bus near to floor (gap 2-3mm)from rigid floor . and then run in ls dyna .

i never did free fall run (means tilt the bus from unstable angle through gravity value.) i face problem in free fall run .(want to co relate results with physical testing). my bus not rotate againt angle . its jump up and down not tile can u please help which contact i should us for rotation of bus. or either i share my result or deck file.please help.

video result file attached to understand the error . please see and support

12. how to cross plot force vs displacemet ?

On 6/26/2016 at 12:54 PM, Maaz said:

i have plot displacement vs time and Force vs Time .

how to cross plot force vs displacement in hyperview

hi

i am also facing same problem.

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