Hoping this one will be easy to solve.

I've set up a full car model for dynamic analysis but we are using a forward mounted steering rack. The steering is currently in reverse because I started with the wizard model that has the steering rack configured behind the front axles.

How can I reverse the steering action? Is this a coupler feature?

I'm modeling a full vehicle event and facing some problems when I try to alter the Rigid body by the Flexible body. With rigid body, my model run well. The error come when I chage body to flexible, the run no longer converge. I recognise It happen because the joint that fix the gear housing of steering boost to the flexible body. When I try to fix it to Chassis (Chassis is Rigid body and was fixed to flexible body) It still run. Could anyone please explain for me why It happen like that and what are comon mistakes leading to disconvergence of model? Below is the log file.

Thanks for your reading and I'm sorry if it is an inscrutable expression.

Time=1.119E-01; Order=2; H=8.365E-06 [Max Phi=8.134E-11]

Time=1.121E-01; Order=2; H=1.133E-05 [Max Phi=5.074E-09]

Time=1.122E-01; Order=3; H=2.474E-06 [Max Phi=1.879E-09]

Time=1.123E-01; Order=3; H=2.984E-06 [Max Phi=8.737E-11]

Time=1.123E-01; Order=3; H=5.273E-07 [Max Phi=2.332E-05]

WARNING: [DASPK] The nonlinear system solver in the time integration could not converge

.....

Time=1.123E-01; Order=1; H=2.153E-08 [Max Phi=6.221E-05]

Time=1.123E-01; Order=1; H=2.629E-12 [Max Phi=8.321E-05]

WARNING: [DASPK] The nonlinear system solver in the time integration could not converge

.....

Time=1.123E-01; Order=1; H=2.588E-14 [Max Phi=8.669E-05]

WARNING: [DASPK] The nonlinear system solver in the time integration could not converge

.....

WARNING: [DASPK] The nonlinear system solver in the time integration could not converge

.....

DAE SOLVER STATISTICS (DASPK-Index1)

------------------------------------------------

Number of solution steps = 556

Number of residue evaluations = 1701

Number of jacobian computations = 901

Number of error test failures = 7

Number of nonlinear convergence failures = 86

WARNING: Repeated abnormal return from integrator!

ERROR: At time=1.123E-01 the integrator failed to proceed.

]]>

I am fairly new in using MotionView and I am currently trying to simulate a simple arm of a roboter, which picks a cube and rotates 90 degrees.

After rotation, the cube should be dropped and the arm should rotate back to starting position.

Now to my first try:

- fixed joint between arm and cube

- marker at the starting point and the end point of the rotation

I tried to solved the problem using the tutorial MV-1051 (sequential motion) but it's not exactly like I wanted to. I used a template like in MV-1051 and tried to adapt it, but it didn't work.

Could you please advise how to proceed in such a case?

Thanks in advance and if you need further information, just let me know.

Best regards,

Flo

]]>

i am trying to do rigid and flexible body contact. but getting error message, while creating Deformable surface through Macro - create Deformable surface from FEM as shown in picture.

can't read "Num_Occ()": no such element in array

can't read "Num_Occ()": no such element in array

while executing

"if { $Num_Occ($NextRowPointer) == 1 } {

set MarkerNodeList([expr $NumMarkerRows + 1]) $NextRowPointer

..."

(procedure "::model::_private::Surface_Macro::CreateMarkers" line 264)

invoked from within

"::model::_private::Surface_Macro::CreateMarkers"

("eval" body line 1)

invoked from within

"# Compiled -- no source code available

error "called a copy of a compiled script""

(procedure "::hwt::ReleaseCanvasButton" line 1)

invoked from within

"::hwt::ReleaseCanvasButton 0 .modelPanel.surfCreate.bottom.btnGenerate"

(command bound to event)

Please give suggestions to eliminate this error.

Thanks,

Narasimhamurthy

]]>

I am using motionview/motionsolve to simulate the scissor link mechanism as below image.

I have represented the revolute and transnational joint at the link end location.

Please share the preferable friction represent. I have used the default properties at the joint friction but I did not get any output force due to friction.

Please share your comments.

Thanks and Regards,

Yuvaraj S

]]>

Then, I end up with 2 problems:**1: How to specify the valid number of Mass and Inertia for the Bodies that I created?**

**2: How to define motion of Front jack and Rear jack to get in case of real road condition?**

The main purpose is I want to extract valid load history on interface nodes to do fatigue analysis. The deadline is coming., hope you guys can help me soon. Thanks!

]]>

I modeled a gear and want to find out angular velocity of the gear,

how to do that,should I include any expression and how to do with that

Thank you

]]>Could i just apply a static force to act for 0.1 seconds?

]]>

I am currently working on a project to optimize the topology of an robot arm.

Specification is as follows: Rigid bodies, extract forces by using MotionView, optimize robot arm with Hypermesh / Optistruct.

Attached a picture of the roboter, the red robot arm is the one to optimize.

Therefore I made a simulation with MotionView - Robot picks a cube, lifts, rotates and puts it back down, then it rotates back without the cube.

To get the forces acting on this robot arm (or on the 2 joints of the robot arm) I placed 2 Outputs on the joints. Now I used the tutorial MV-3030: Load Export to get these forces.

I tried to import these in Hypermesh to use it for optimization, but I don't know how.

My questions:

- How to get forces / loads from MotionView to Hypermesh?

- Is the procedure I am trying currently correct or is there another way to optimize a part?

- What's the usual procedure to solve a problem like this?

- I found out that there's the Equivalent Static Load Method, but it's only usable with flexible bodies... is there a possibility to use it with rigid bodies?

Thanks in advance and best regards,

Flo

]]>WARNING: FIM failed. Attempting MKEAM....

and later on in the motions solve box I get this other error:

ERRMES:USER [334001]

<< ALTAIR DRIVER :: Error running STATICS/Static

** EXECUTION STOPS DUE TO ENDFLG IN USER SUB **

]]>

Thanks in advance.

]]>

]]>

I've imported a geometry in motionview from a step file and consequently bodies have been created.

How can I define points in order to, in a second step, specify joints? Some tutorials show that points can be created using a point table file, but how can I create this table? Is there a method to create it from my step file? Or is there another method to create points directly in MotionView?

hope to receive some explanations. Thanks in advance.

]]>for my thesis project I have the altair license, so I can use all the applications. I have the following problem, each time I open Motionview the error that you can see from the 1st picture occurs. In addition, each time I try to open a tutorial model it occurs another error, that you can see in the 2nd picture.

I hope I was as clear as possible and thank you for your help.

Luca Pietropoli

]]>

]]>

I'm trying to evaluate the reaction forces on both the translational joints (they have been modeled as compliance joints in order to do not get redundant constraints). To achieve this result, I need to apply a motion between the piston (green one) and the case of the cylinder (yellow one) using makers, but the system fails to reach the convergence. I would like to know how to apply the motion using markers, since seems to be quite tricky to me.

Thank you all.

]]>

As you can see in the attached picture, I'm trying to understand if the initial inclination of the pneumatic cylinder has any effects on the torque needed to tilt the arm. I imported the CAD into my motionview model (Cylinder in vertical position) and I would like to know if there is any way to rotate the cylinder and its components (cylinder case and piston). I tried to achieve this result by defining the position of the Center of Mass as a function of the inclination angle (expressed as a solver variable, in order to optimize its value by using hyperstudy in a second moment), but I'm afraid that I simply translated the center of mass instead of rotate it (see picture), in fact the floating marker associated to the piston is not tilted.

How can I achieve this result?

How can I rotate the graphic too? (I tried with "orientation" but I cannot fully understand which angles it desired as input)

Thanks for helping me in this matter.

]]>

I have imported in MW a cad file (attached), my problem is: my cad file includes tires, but obviously these tires are not realistic (they are rigid bodies). I've put a jack plate to make wheels move up and down (to simulate for example a wheel that takes a hole) with the aim of estimate the force that will affect the frame. For this reason, tires cant be rigid bodies.. Is correct to use a spring dumper in order to have a better and more realistic representation of the wheel? Where to put it? Between a point, for ex the center of the wheel, and the jack plate or in place of the wheel? Ho to estimate k ad c coefficients? Or is there any other method? I think that the force on the frame, if the wheel takes a bump, won't be realistic if the wheel is simply a rigid body from a cad file: that's my problem!

Thanks in advance.

]]>

is there a way to save the complete data together(including Graphic and CSV data) in the same file. it seems like if i move the Graphic or CSV file, the Motionview file could not detect the data anymore and no graphic or curve is defined in the MDL file. I need to `guide` the directory again to the CAD or CSV file.

Thanks in advance.

Farris

]]>

the errors that I'm getting is

ERROR: At time=1.401E-08 the integrator failed to proceed.

----------- Possible Causes -----------------------------------------------------

(1) The integration has become unstable. Tighten (decrease) integr_tol, h_max,

or both in Param_Transient can help stabilize the integration. If the simulation

contains distinctive phases, use multiple Simulate, each with its

own proper integrator parameter setting, to selectively tighten the tolerance

during the period where instability is encountered.

(2) If the simulation was terminated because stepsize has diminished consistently

below h_min, reduce h_min in Param_Transient to force integration to continue.

(3) Non-physical inertia properties, such as mass=100 Kg and Ixx=Iyy=Izz=1 Kg*mm^2,

or extremely small inertia on a part with an unconstrained degree of freedom.

Make sure the modeling data, in particular the part inertia and the gravity, are

specified in proper units consistent with the units given in Param_Unit element.

(4) Beam, flexible body goes out of linear range, bushing has large rotation along

more than one axis, curve goes out of its interpolation range, higher-pair joint

goes out of the range of U or V, etc. Make sure fundamental modeling assumptions,

such as rigid contact assumption used in Force_Contact, are not violated.

(5) Motion displacement defined using LINSPL, AKISPL in dynamic analysis, or as a

function of model states (DX, VX etc), as well as forces defined as a function of

other forces, can cause hard convergence and integrator failure. Avoid these

modeling practices wherever possible.

---------------------------------------------------------------------------------

ERROR: Abnormal return from transient analysis

]]>-top_radius of Frustum Graphics/90001 cannot be zero

Hello I am analyzing the AutobushFD Model under simple lateral force with fixed constraint base and getting this error. Kindly help me in proceedings it's urgent for me to get over this error.

]]>

I am studying MotioView/MotionSolve. On youtube, I have found useful tutorial videoes about " Load extraction motorcycle Flexbody in MotionView". But I can't find the model motorcycle to practice.

Does anyone have that model?

Thank you very much.

This is tutorial video:

]]>

is it possibile to limit the revolution around two axis (for examle 8°) using a ball joint? ]]>