How to chech if a multibody model is correct

In summary, there are several steps that can be taken to check the accuracy of a multibody model, including comparing it to real-world data, performing simulations, and reviewing equations and assumptions. Common errors in multibody models include incorrect boundary conditions, missing or incorrect constraints, and errors in equations or numerical methods. Software can be used to validate a multibody model, but it is still important to manually review and compare it to real-world data. To ensure accuracy, it is recommended to use a combination of methods and have multiple people review the model. There are also guidelines and standards available for creating multibody models in different industries, such as the SAE standards for the automotive industry. It is important to research and follow these
  • #1
serbring
269
2
Hi all,

I have just created a multibody model of a mechanism. Since it's a bit complex to perform hand calculation, what should I do to check if it's correct?

Thanks
 
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  • #2
Do the hand calculation anyway? Or do a hand calculation of a smaller simplified version of it?
 
  • #3
Mech_Engineer said:
Do the hand calculation anyway? Or do a hand calculation of a smaller simplified version of it?

Ja, you're on right, I think i should be able to simplify the system, maybe through linearization and so on. Thanks!
 

1. How do I check if a multibody model is correct?

There are several steps you can take to check the accuracy of a multibody model. First, you can compare your model to real-world data or experimental results to see if it accurately represents the system. You can also perform simulations with different inputs or boundary conditions to ensure that the model responds as expected. Additionally, you can review the equations and assumptions used in the model to check for any errors or simplifications.

2. What are some common errors in multibody models?

Some common errors in multibody models include incorrect boundary conditions, missing or incorrect constraints, and incorrect material properties or physical parameters. It is also possible to have errors in the equations or numerical methods used to solve the model. It is important to thoroughly review all aspects of the model to identify and correct any errors.

3. Can software be used to validate a multibody model?

Yes, there are several software programs available that can be used to validate a multibody model. These programs use simulation and analysis tools to compare the model's behavior to expected results and can help identify any errors or discrepancies. However, it is still important to review the model manually and compare it to real-world data for a more comprehensive validation.

4. How can I ensure that my multibody model is accurate?

To ensure the accuracy of a multibody model, it is important to validate it using a combination of methods. This includes comparing it to real-world data, performing simulations with different inputs, and reviewing the equations and assumptions used in the model. It is also helpful to have multiple people review the model to catch any potential errors or oversights.

5. Are there any guidelines or standards for creating multibody models?

Yes, there are several guidelines and standards for creating multibody models, depending on the specific application or industry. For example, the Society of Automotive Engineers (SAE) has published standards for multibody dynamics simulations in the automotive industry. Additionally, many software programs have their own guidelines and best practices for creating accurate multibody models. It is important to research and follow these guidelines to ensure the accuracy and reliability of your model.

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