yade-users team mailing list archive

["Liqing Jiao" <jiaoliqing@xxxxxxxx>]

Dear Bruno,

I used yade-0.70.0. I run it before in yade-0.50, it worked. But in yade-0.70.0, it doesn't work. Could you help me to check it again in the 0.70 version. As for the time step. I used the defined function, I can see the value of dt, I can calculate the displacement of that block. I will try use GSTimeStepper again. Thank you very much.

Cheers, Liqing



At 2012-02-16 20:25:12,"Bruno Chareyre" <bruno.chareyre@xxxxxxxxxxx> wrote:
Hi Liqing,

I'm running your script without gravity engine and I don't see any problem.
Note that dt is excessively small, it could be 10x larger without problem. You don't have to worry about that dt if you use GSTimeStepper (commented in your current script).

Bruno

On 16/02/12 12:20, Liqing Jiao wrote:
Dear Bruno,

I am sorry, I don't know how to work on bzr version. Could you help me? Which version is bzr version? Thank you very much. Looking forward to your reply.

Cheers, Liqing

At 2012-02-02 18:40:16,"Bruno Chareyre" <bruno.chareyre@xxxxxxxxxxx> wrote:
Dear Liqing,

All examples scripts of triaxial simulations are working correctly without a gravity engine. So, you must have another problem that the gravity engine is only hiding.
In order to help users in such cases, we need working scripts generally, not just parts of them.
The other problem here is you are developing your own contact law, which makes it impossible to test your scripts currently. We can't help in this situation.
If it is improving something, you could consider working on the bzr version and integrate your law in the source code after some review from us.

Bruno

On 02/02/12 09:29, Liqing Jiao wrote:
Dear Anton,

Thank you very much for your warm help. My engine file is following. But I organized the new Ip2, and Law2 files which are modified based on Luc's model. As for triax, that is "ThreeDTriaxialEngine". Without GravityEngine, I can't run it. It doesn't work. But, including GravityEngine, it can work. If I set the three parameters in GravityEngine to be zero, it also can't work. I wish that the information I post here is enough. Thank you very much.

O.engines=[
    ParallelEngine([
     ForceResetter(),
     BoundDispatcher([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]),
    InsertionSortCollider(),]),
    InteractionLoop(
        [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1.25),Ig2_Box_Sphere_ScGeom()],
        [Ip2_LpmMat_LpmMat_LpmPhys()],
        [Law2_ScGeom_LpmPhys_LPlasPM()]
    ),
    #GlobalStiffnessTimeStepper(),
    triax,
    # you can add TriaxialStateRecorder and such here…
    #PyRunner(iterPeriod=1,command='lateral()',initRun=False),
    GravityEngine(gravity=(0,0,-0.1)),
    #GravityEngine(gravity=(0,0,9.9)),
    NewtonIntegrator(damping=.4),
    ]

Cheers, Liqing


At 2012-01-28 14:42:39,"Anton Gladky" <gladky.anton@xxxxxxxxx> wrote:
>Hi,
>
>just do not add GravityEngine. Please, attach the problem-script to
>give a more precise answer.
>
>Anton
>
>
>
>2012/1/28 Liqing Jiao <jiaoliqing@xxxxxxxx>:
>>  Dear All,
>>
>> I want to simulate a compression test without gravity effect. But I found I
>> can't run it. If I add the gravity engine, then It can run. Could you please
>> help me to solve this problem? Thank you in advance.
>>
>> Cheers, Liqing
>>
>>
>>
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-- 
_______________
Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
11, rue des Mathématiques
BP 46
38402 St Martin d'Hères, France
Tél : +33 4 56 52 86 21
Fax : +33 4 76 82 70 43
________________






-- 
_______________
Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
11, rue des Mathématiques
BP 46
38402 St Martin d'Hères, France
Tél : +33 4 56 52 86 21
Fax : +33 4 76 82 70 43
________________