Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Status: Answered => Solved Jonathan Pergoli confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Jonathan Pergoli posted a new comment: Hi Jan, sorry I have made a mess with the code :) I have used O.bodies.append(body). Anyway, I have solved the problem using angMom :) Thank you, Jonathan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Jan Stránský proposed the following answer: Hi Jonathan, next time please try the script that it really works ;-) and please doulble check if both scripts are exactly the same for the two versions (especially O.bodies.append, see below) To get some effect, you should use O.bodies.append(body) so that the engines know about the particle. Do you use it in your scripts or not? If you don't add body to O.bodies, than angVel does not change (but the body does not move at the same time, because Yade engines do not know about the particle) With O.bodies.append(body), angVel is reset after O.step(), which is expected (see e.g. [1] and links from there). Setting angMom is the solution. The relation is angMom = inertiaTensor*angVel (similar to momentum=mass*velocity). If this works for you, it should not be a problem to correctly define inertiaTensor. cheers Jan [1] https://answers.launchpad.net/yade/+question/274324 2016-09-22 12:57 GMT+02:00 Jonathan Pergoli < question401...@answers.launchpad.net>: > Question #401682 on Yade changed: > https://answers.launchpad.net/yade/+question/401682 > > Jonathan Pergoli posted a new comment: > Hi Jan, > > sorry I will provide the working script: > > E1=1e+8 > E2=5e+7 > mat=FrictMat(density=643,frictionAngle=0.1489,label="MLI",young=E2) > MLI=O.materials.append(mat) > a=.2754 > b=.2822 > c=.1963 > aa=a/2 > bb=b/2 > cc=c/2 > h=.65 > dist=0 > theta=0 > thetav=0 > v1=(aa,bb,c) > v2=(aa,-bb,c) > v3=(-aa,-bb,c) > v4=(-aa,bb,c) > v5=(aa,bb,0) > v6=(aa,-bb,0) > v7=(-aa,-bb,0) > v8=(-aa,bb,0) > V=[v1,v2,v3,v4,v5,v6,v7,v8] > vz=.19 > R=[[m.cos(theta),0,m.sin(theta)],[0,1,0],[-m.sin(theta),0,m.cos(theta)]] > v1=(R[0][0]*V[0][0]+R[0][1]*V[0][1]+R[0][2]*V[0][2],R[1][0]* > V[0][0]+R[1][1]*V[0][1]+R[1][2]*V[0][2],R[2][0]*V[0][0]+R[ > 2][1]*V[0][1]+R[2][2]*V[0][2]) > v2=(R[0][0]*V[1][0]+R[0][1]*V[1][1]+R[0][2]*V[1][2],R[1][0]* > V[1][0]+R[1][1]*V[1][1]+R[1][2]*V[1][2],R[2][0]*V[1][0]+R[ > 2][1]*V[1][1]+R[2][2]*V[1][2]) > v3=(R[0][0]*V[2][0]+R[0][1]*V[2][1]+R[0][2]*V[2][2],R[1][0]* > V[2][0]+R[1][1]*V[2][1]+R[1][2]*V[2][2],R[2][0]*V[2][0]+R[ > 2][1]*V[2][1]+R[2][2]*V[2][2]) > v4=(R[0][0]*V[3][0]+R[0][1]*V[3][1]+R[0][2]*V[3][2],R[1][0]* > V[3][0]+R[1][1]*V[3][1]+R[1][2]*V[3][2],R[2][0]*V[3][0]+R[ > 2][1]*V[3][1]+R[2][2]*V[3][2]) > v5=(R[0][0]*V[4][0]+R[0][1]*V[4][1]+R[0][2]*V[4][2],R[1][0]* > V[4][0]+R[1][1]*V[4][1]+R[1][2]*V[4][2],R[2][0]*V[4][0]+R[ > 2][1]*V[4][1]+R[2][2]*V[4][2]) > v6=(R[0][0]*V[5][0]+R[0][1]*V[5][1]+R[0][2]*V[5][2],R[1][0]* > V[5][0]+R[1][1]*V[5][1]+R[1][2]*V[5][2],R[2][0]*V[5][0]+R[ > 2][1]*V[5][1]+R[2][2]*V[5][2]) > v7=(R[0][0]*V[6][0]+R[0][1]*V[6][1]+R[0][2]*V[6][2],R[1][0]* > V[6][0]+R[1][1]*V[6][1]+R[1][2]*V[6][2],R[2][0]*V[6][0]+R[ > 2][1]*V[6][1]+R[2][2]*V[6][2]) > v8=(R[0][0]*V[7][0]+R[0][1]*V[7][1]+R[0][2]*V[7][2],R[1][0]* > V[7][0]+R[1][1]*V[7][1]+R[1][2]*V[7][2],R[2][0]*V[7][0]+R[ > 2][1]*V[7][1]+R[2][2]*V[7][2]) > body=utils.polyhedron((v1,v2,v3,v4,v5,v6,v7,v8),fixed= > False,color=(.6,.45,0),material="MLI",wire=False) > body.state.angVel=(0,0,0.1) > r=m.sqrt(aa**2+bb**2) > Rj=m.sqrt(r**2+cc**2) > Ri=0.05 > Rr=Rj*Ri/(Rj+Ri) > mu_rM=0.05 > mu_rG=1.08 > KN=E1*2*Ri*E1*2*Ri/(E1*2*Ri+E1*2*Ri) > KR=3*Ri**2*mu_rG**2*KN/4 > > O.engines=[ > ForceResetter(), > InsertionSortCollider([Bo1_Polyhedra_Aabb()]), > InteractionLoop( > [Ip2_FrictMat_FrictMat_MindlinPhys(en=.45,es=.45, > krot=KR,frictAngle=.7853)], > [Law2_ScGeom_MindlinPhys_Mindlin(includeMoment=True)] > ), > NewtonIntegrator(gravity=(0,0,-2.5e-4),damping=0), > ] > > The script is the same and also the version of yadedaily. > > I'll try with angMom. > > Thank you, > > Jonathan > > -- > You received this question notification because your team yade-users is > an answer contact for Yade. > > ___ > Mailing list: https://launchpad.net/~yade-users > Post to : yade-users@lists.launchpad.net > Unsubscribe : https://launchpad.net/~yade-users > More help : https://help.launchpad.net/ListHelp > -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Jonathan Pergoli posted a new comment: Hi Jan, sorry I will provide the working script: E1=1e+8 E2=5e+7 mat=FrictMat(density=643,frictionAngle=0.1489,label="MLI",young=E2) MLI=O.materials.append(mat) a=.2754 b=.2822 c=.1963 aa=a/2 bb=b/2 cc=c/2 h=.65 dist=0 theta=0 thetav=0 v1=(aa,bb,c) v2=(aa,-bb,c) v3=(-aa,-bb,c) v4=(-aa,bb,c) v5=(aa,bb,0) v6=(aa,-bb,0) v7=(-aa,-bb,0) v8=(-aa,bb,0) V=[v1,v2,v3,v4,v5,v6,v7,v8] vz=.19 R=[[m.cos(theta),0,m.sin(theta)],[0,1,0],[-m.sin(theta),0,m.cos(theta)]] v1=(R[0][0]*V[0][0]+R[0][1]*V[0][1]+R[0][2]*V[0][2],R[1][0]*V[0][0]+R[1][1]*V[0][1]+R[1][2]*V[0][2],R[2][0]*V[0][0]+R[2][1]*V[0][1]+R[2][2]*V[0][2]) v2=(R[0][0]*V[1][0]+R[0][1]*V[1][1]+R[0][2]*V[1][2],R[1][0]*V[1][0]+R[1][1]*V[1][1]+R[1][2]*V[1][2],R[2][0]*V[1][0]+R[2][1]*V[1][1]+R[2][2]*V[1][2]) v3=(R[0][0]*V[2][0]+R[0][1]*V[2][1]+R[0][2]*V[2][2],R[1][0]*V[2][0]+R[1][1]*V[2][1]+R[1][2]*V[2][2],R[2][0]*V[2][0]+R[2][1]*V[2][1]+R[2][2]*V[2][2]) v4=(R[0][0]*V[3][0]+R[0][1]*V[3][1]+R[0][2]*V[3][2],R[1][0]*V[3][0]+R[1][1]*V[3][1]+R[1][2]*V[3][2],R[2][0]*V[3][0]+R[2][1]*V[3][1]+R[2][2]*V[3][2]) v5=(R[0][0]*V[4][0]+R[0][1]*V[4][1]+R[0][2]*V[4][2],R[1][0]*V[4][0]+R[1][1]*V[4][1]+R[1][2]*V[4][2],R[2][0]*V[4][0]+R[2][1]*V[4][1]+R[2][2]*V[4][2]) v6=(R[0][0]*V[5][0]+R[0][1]*V[5][1]+R[0][2]*V[5][2],R[1][0]*V[5][0]+R[1][1]*V[5][1]+R[1][2]*V[5][2],R[2][0]*V[5][0]+R[2][1]*V[5][1]+R[2][2]*V[5][2]) v7=(R[0][0]*V[6][0]+R[0][1]*V[6][1]+R[0][2]*V[6][2],R[1][0]*V[6][0]+R[1][1]*V[6][1]+R[1][2]*V[6][2],R[2][0]*V[6][0]+R[2][1]*V[6][1]+R[2][2]*V[6][2]) v8=(R[0][0]*V[7][0]+R[0][1]*V[7][1]+R[0][2]*V[7][2],R[1][0]*V[7][0]+R[1][1]*V[7][1]+R[1][2]*V[7][2],R[2][0]*V[7][0]+R[2][1]*V[7][1]+R[2][2]*V[7][2]) body=utils.polyhedron((v1,v2,v3,v4,v5,v6,v7,v8),fixed=False,color=(.6,.45,0),material="MLI",wire=False) body.state.angVel=(0,0,0.1) r=m.sqrt(aa**2+bb**2) Rj=m.sqrt(r**2+cc**2) Ri=0.05 Rr=Rj*Ri/(Rj+Ri) mu_rM=0.05 mu_rG=1.08 KN=E1*2*Ri*E1*2*Ri/(E1*2*Ri+E1*2*Ri) KR=3*Ri**2*mu_rG**2*KN/4 O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Polyhedra_Aabb()]), InteractionLoop( [Ip2_FrictMat_FrictMat_MindlinPhys(en=.45,es=.45,krot=KR,frictAngle=.7853)], [Law2_ScGeom_MindlinPhys_Mindlin(includeMoment=True)] ), NewtonIntegrator(gravity=(0,0,-2.5e-4),damping=0), ] The script is the same and also the version of yadedaily. I'll try with angMom. Thank you, Jonathan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Status: Open => Answered Jan Stránský proposed the following answer: Hi Jonathan, please provide a working script, i.e. with definitions of v1-v8, MLI etc. such that we can try what does not work. do you use the same versions of yadedaily on both machines? do you use the same script on both machines (not like polyhedron on one and sphere on the other)? meanwhile try to set angMom instead of angVel for non-spherical shapes. cheers Jan 2016-09-21 17:53 GMT+02:00 Jonathan Pergoli < question401...@answers.launchpad.net>: > New question #401682 on Yade: > https://answers.launchpad.net/yade/+question/401682 > > Hi everybody! > > I'm trying to set an initial value of the angular velocity for a body. I > set the angular velocity: > body.state.angVel=(0,0,0.1) > > Then when I start yadedaily at the beginning of the simulation the angular > velocity is correct but when I write O.run() I don't know why the angular > velocity is set to (0,0,0). This happen when I use yadedaily for ubuntu > server 14.04 LTS whereas when I run the simulation with ubuntu 14.04 on my > laptop it works well and this problem is not present. Any solutions? > > Thank you in advance, > > Jonathan > > -- > You received this question notification because your team yade-users is > an answer contact for Yade. > > ___ > Mailing list: https://launchpad.net/~yade-users > Post to : yade-users@lists.launchpad.net > Unsubscribe : https://launchpad.net/~yade-users > More help : https://help.launchpad.net/ListHelp > -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Description changed to: Hi everybody! I'm trying to set an initial value of the angular velocity for a body. I set the angular velocity: body=utils.polyhedron((v1,v2,v3,v4,v5,v6,v7,v8),fixed=False,color=(.6,.45,0),material="mat",wire=False) body.state.angVel=(0,0,0.1) wx=body.state.angVel[0] wy=body.state.angVel[1] wz=body.state.angVel[2] Then when I start yadedaily at the beginning of the simulation the angular velocity is correct but when I write O.run() I don't know why the angular velocity is set to (0,0,0). This happen when I use yadedaily for ubuntu server 14.04 LTS whereas when I run the simulation with ubuntu 14.04 on my laptop it works well and this problem is not present. Any solutions? Thank you in advance, Jonathan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #401682]: Problem with angular velocity
Question #401682 on Yade changed: https://answers.launchpad.net/yade/+question/401682 Description changed to: Hi everybody! I'm trying to set an initial value of the angular velocity for a body. I set the angular velocity: body=utils.polyhedron((v1,v2,v3,v4,v5,v6,v7,v8),fixed=False,color=(.6,.45,0),material="MLI",wire=False) body.state.angVel=(0,0,0.1) wx=body.state.angVel[0] wy=body.state.angVel[1] wz=body.state.angVel[2] Then when I start yadedaily at the beginning of the simulation the angular velocity is correct but when I write O.run() I don't know why the angular velocity is set to (0,0,0). This happen when I use yadedaily for ubuntu server 14.04 LTS whereas when I run the simulation with ubuntu 14.04 on my laptop it works well and this problem is not present. Any solutions? Thank you in advance, Jonathan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
