implementing own vehicle as cad

User: "Pantelis_Myrio"
Altair Community Member

Hello, currently my plan is to implement a vehicle (buggy) as cad, model it so it includes joints etc and then make an event like slalom. I will keep it simple so it will contain:

1)Chassis

2)Tires

3)control arms for suspensions

4) springs-absorbers

5) knuckles for joints tires with suspensions

There will be no engine, steering wheel.

image.png

WHat could i implement from the vehicle tools libraries to make it easier. I was thinking about tires.

Whats the procces of implementing tires to the model? Is there a guide?

also when i decide to make the slalom event, i guess the most reasonant way is setting an altair driver in the model. Is this even possible when i havent included engine/steering wheel or i should use motions to make this event feel like it ??

will this be enough to make the premade tires keep in contact with ground and follow the diy event? will this work as it is supposed to ? is there any easier way ?

Any tips are welcome.
Thanks in advance.

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    User: "GTT Adam"
    Altair Employee
    Accepted Answer
    Updated by GTT Adam

    Hi @Pantelis_Myrio,

    Implementing your own vehicle model can mainly be approached 2 ways:

    • Modifying an assembly created using our Assembly Wizard
    • Creating the entire model from scratch

    In most cases, there is an assembly model that is close to your vehicle configuration that will allow you to skip ~80% of model creation and save a considerable amount of time, especially if you are new to the product.

    To answer your specific questions:

    How to implement tires:

    From the Entity Browser, navigate to Vehicle Tools » Components » Tire

    image.png

    Use the Guide Bar to define an attachment body, wheel center point, tire marker. and road marker.

    image.png

    Please look at any of the assembly models or example models for examples of what bodies/points/markers are chosen for definition.

    image.png

    Driving Events:

    You will need to add the necessary kinematics to the model in order to simulate the vehicle. You can't just import the CAD and expect it to simulate properly. After adding in the necessary constraints, tires, etc., then you can implement the Altair Driver Model to navigate driven events.

    Almost identical to above, please add the Altair Driver Model from the Entity Browser » Vehicle Tools » Components » Driver. Use the Guide Bar to select the first set of necessary entities, then further define the Driver in the Entity Editor:

    image.png image.png

    Altair has plenty of in-depth resources to help you learn and master various Altair products, such as eLearning, Community Discussions, and Tutorials.

    Altair offers an introductory course, MotionView/MotionSolve Introduction eLearning, for solving multi-body dynamics (MBD) problems using HyperWorks and illustrates constructing, solving and post-processing MBD problems. This course focuses on general Multibody mechanisms and is a starting point for learning modeling in MotionSolve.

    You can find it at the following link: https://learn.altair.com/enrol/index.php?id=496

    Altair also offers a specialized multi-body dynamics (MBD) course for vehicle modeling, called MotionSolve for Vehicle Modeling eLearning. This class introduces the application of MotionSolve for vehicle modeling applications, such as assembly of half or full car models, vehicle event creation, generating event reports, modifying vehicle subsystems, and preliminary verification methods.

    You can find it at the following link: https://learn.altair.com/enrol/index.php?id=497

    Hope this helps!

    Adam Reid