Facing problem in defining steering lock

Sudip_Chavan
Sudip_Chavan Altair Community Member
edited February 6 in Community Q&A

Hello Everyone,

I'm currently built front trailing arm suspension with pitman arm steering model. Previously I was simulating my model with some default inputs but now I've defined all custom inputs for my model. The model simulation looks good but log file does not, it gives many warnings for the model. 

Some of the major warnings shown are

1. The axle seems to be steered , but no travel locks have been defined.

2. Virtual Steer axis and derived values, such as Caster Trail or Scrub radius may be highly inaccurate.'

3. Travel compliance is vey high

 

I am attaching log file of the model with some snapshots of steering lock which I defined in the model.

 

Thanks and Regards, 

Sudip Chavan

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Best Answer

  • GTT Adam
    GTT Adam
    Altair Employee
    edited February 6 Answer ✓

    Hi Sudip,

    These warnings are present as you have potentially exceeded some predefined values that the solver checks by default to ensure a well-defined model. Since the simulation completed and you say the simulation looks good, then I would not obsess over these warnings. If you have an atypical suspension with large allowable suspension travel, then that would be enough to trigger these warnings.

    I would be extra mindful, however, of results you are extracting from the SDS reports due to these warnings. Try to do your own rough calculations to ensure these SDS values are feasible for your own peace of mind. 

     

    Hope this helps!

    Adam Reid

Answers

  • GTT Adam
    GTT Adam
    Altair Employee
    edited February 6 Answer ✓

    Hi Sudip,

    These warnings are present as you have potentially exceeded some predefined values that the solver checks by default to ensure a well-defined model. Since the simulation completed and you say the simulation looks good, then I would not obsess over these warnings. If you have an atypical suspension with large allowable suspension travel, then that would be enough to trigger these warnings.

    I would be extra mindful, however, of results you are extracting from the SDS reports due to these warnings. Try to do your own rough calculations to ensure these SDS values are feasible for your own peace of mind. 

     

    Hope this helps!

    Adam Reid

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