-
About Anti-dive results on a KnC test (Baja SAE)
Hello, I am validating the geometry for a double wishbone Baja SAE front suspension. After reviewing the results from the SDF file (KnC ride, roll and steering), I am having trouble interpreting the results. At 0s it shows an Anti-dive % of -13.46, the design value was intended to be 25%; the Anti-lift result seems to be…
-
Suspension Travel lock
Hello @GTT Adam, I tried adding a bump stop to hard-stop the suspension travel. My suspension can travel up to 50 mm in jounce and 50 mm in rebound. To simulate the same scenario, I set the jounce travel to 60 mm and checked whether the suspension stops at 50 mm. As a result, the suspension exceeded 50 mm, and the shock…
-
Double Lane event in the wrong direction
Im trying to simulate a double lane event in motion view and the car goes in the opposite direction of the turn direction. If it is set to Left, in the first turn the car starts going rigth and if it is set to Right the car starts turning left. I dont understand why this is happening and i would appreciate any help as soon…
-
Tires are failing to detect road profiles, or are doing so with significant delay
Hello, I'm trying to run a RoadCourse simulation on Altair MotioSolve, however, the front tires of the vehicle assembly are not detecting the road profile, or are doing so with significant delay. The vehicle model and the road profile is shown as follows: The vehicle assembly is a official Altair-provided template for Baja…
-
Can't import geometry to MotionView
I can't import geometry to Altair MotionView. Tried direct importing the geometry in STEP, Solidworks, Parasolid, STL and even Hypermesh formats, however, still can't import it. No error message is displayed when importing, nor at the message center. Also no error logs are generated. Also tried importing through "Geometry…
-
Why is the workspace of my MotionView blacked out?
I am working in Altair MotionView (MotionSolve) and have successfully created/imported multiple hardpoints (visible in the model tree under “Points”). However, the workspace remains completely black and no geometry is visible. I have tried basic view controls like Fit View and zooming, but nothing appears in the graphics…
-
Discrepancy between simulated and theoretical force
First of all, I'm so sorry that I can’t share the model due to some constraints. But I can provide the coordinates and mass of each body in my model. I think my problem is similar to the example below. At first, I built a model based on the dimensions and load from the jib boom crane example. MotionView gave almost the…
-
Full vehicle simulation convergence error
Hello Everyone, I am trying to perform a full vehicle simulation; however, when I replace the default rear suspension with my rear suspension model, the simulation fails. I have attached the model and the video file.
-
Question about a post regarding MotionView coupling with EDEM and Inspire in the community.
This post explains using Inspire to parameterize the geometry, then importing the parameterized model into EDEM, and finally coupling it with HyperStudy. I understand all the steps up to this point. However, I’m confused about the part where the parameterized geometry is imported into EDEM and then coupled with MotionView.…
-
Roll Center Height and lateral Displacement calculations
Hello, For my rear suspension, I have a pure trailing arm setup. I used the semi-trailing arm template and modified it by deleting the toe link and making the trailing bushings parallel to each other, according to the geometry, the roll center height should be zero should lie on the ground plane but according to the…
-
Running Scripted Simulation with Quasi-Static Analysis Type
In MotionSolve, when using scripted simulation, I want to run a quasi-static analysis. However, when I replace analysis_type="Transient" with analysis_type="QuasiStatic" in the analysis_type, the solver still behaves like a transient simulation. What is the correct way to set up a quasi-static analysis in scripted…
-
Loading H3D crash in specific conditions
I have altair 2024.1 I have a shaker vehicule model with a track, I run the simulation, everything works smoothly during motionsolve. When i try to load h3d results on motionview with review run results button, no issues at all. When i try to load h3d results with hyperview. I can load model, but when i click play my model…
-
Using MotionView 2024
I can't get all the available toolbars in MotionView. Reading manuals leads to looing for stuff that is just not there. Uninstalling and reinstalling does not solve it. When I use "View" to look for toolbars, they are missing and my work is stuck. Is it because we have 22 units or something else?
-
Problème de simulation Freinage dans MotionView -Bloquant
Bonjour, Nous avon un problème sérieux dans motionview lorsqu'on simule le freinage. Inchoerence des résultats, on optient des résultats différents pour le même modèle (Identique) suivant la façon de lancer la simulation, ci-dessous trois cas, à chaque fois j'obtient des résultats different: Cas 1: je lance la simu…
-
Problem During Constant Radius Event Simulation
During the vehicle cornering simulation (A Constant radius event ), I encountered an issue as illustrated in the figure. Could you please explain the possible causes of this phenomenon and suggest how to resolve it? Thanks in advance!
-
Difference in Force Direction Between Rigid-Body and Flexible-Body Simulations
I performed a simulation of lifting a plate using two cylinders. When the plate was modeled as a Rigid Body, the results showed that force appeared only in one cylinder, and its magnitude was nearly twice the force obtained in the flexible-body case. Therefore, I chose the flexible-body model because it provides a more…
-
Error of end time not specified when trying to do a EDEM coupling simulation in Altair access
Hello, im heaving trouble trying to do a EDEM coupling simulation using altair access HPC. The simulation runs with no problem in the local run, but when i try to use the HPC i got a error message saying that the end time is not specified. I already tryied to export the simulation in python and xml, but none solved the…
-
Problem avec MotionView design vehicule
Je suis en train de changer le graphic de le vehicule mais apres quand je simmula ca ferme tout et je ne sais pas pourquoi
-
Exterior acoustic simulation of Motor to predict SPL using Surface velocity data a input?
Hi, I have a surface velocity data of E-motor/Engine generated by third party MBD solver in .pch file format. I would like to use this data as a excitation to predict the exterior noise at 1m distance microphones. I have looked at the documentation of IE, RADSND & APML methods in optistruct. Surface velocity required for…
-
Impossible de lancer le calcul MotionView – bloquant pour la suite de notre étude
Bonjour, J’ai construit un modèle de train arrière d’une petite voiture à partir de la bibliothèque de MotionView 2025. Cependant, je n’arrive pas à lancer de simulation. À chaque tentative, j’obtiens le message suivant : « Solver FAILED », sans information complémentaire. À titre de comparaison, nous avons déjà construit…
-
Fiala Tire Outputs/Requests - Instantanious friction coefficient (Mu vs Time Step)
Hi all, Is there an easy way to extract the instantaneous longitudinal ground friction coefficient (Mu vs Time Step) from my Fiala Tire model? I'm aware that Longitudinal Slip is already an available output, and thus, I could do some post-processing to derive Mu from the Mu_Slip_curve. However, this could lead to user…
-
Providing a drive and steering system to articulated tractor
Hello All, My question could be basic for many but I would need a guidance to start on this. I have a 35 tonnes tractor model having two-wheels on each side front and rear. It has to take a sharp turn of 90 degrees within its prescribed radius. For steering it articulates from the center. I would like to know, what method…
-
Userinput "German floating numbers"
Is there a setting in Hypermesh, Motionview, hyperview, optistruct or Inspire to let the user input floating point numbers in the german format type "0,2" instead of the english "0.2". Currently, this produces an error when inputting in the german format I did not find a potion to modify the separator directly. This would…
-
MotionVIew
I need to change the lateral friction coefficient of the tire. I modified the .tir file, but the change didn’t have any effect. I’m not sure what the correct procedure is to apply these changes.
-
Several questions about the reproduction of Motionview official case MV-1029
I have gradually built the model according to the case of MV-1029, using PointToDeformableSurfaceContact for contact, but the ball and deformable surface seem to have no contact and have penetrated directly; Later on, I changed it to 3D contact and chose the contact between the ball and the deformable surface. However, the…