Hi Alvaro,

Please keep in mind that:

  1.  The YAML parsers are still work in progress.  As such, the API and YAML 
schemas are subject to change as I keep implementing the necessary support.
  2.  While the goal is to eventually allow specifying and using as many Chrono 
components and features as possible through these YAML specification files, I 
focus on the functionality that is currently needed for the project that funds 
this work.

Having said that, I just pushed some changes related to body loads and added 
support for specifying an optional modulation function. Note that this function 
must correspond to a type currently supported by the YAML schema (it just 
happens that the sine you’re interested in is among those supported).  For more 
details, see the YAML 
schema<https://github.com/projectchrono/chrono/blob/main/data/yaml/schema/mbs_model.schema.yaml>.

--Radu

From: [email protected] <[email protected]> On Behalf 
Of alvaro diaz
Sent: Friday, September 26, 2025 9:04 PM
To: ProjectChrono <[email protected]>
Subject: [chrono] YAML support for sinusoidal loads

Hello,

I was wondering if it is possible (or will be) to define a body load with a 
sinusoidal function type from a yaml, similar to chrono and pychrono.

I have tried doing something similar using motors however, the fact that the 
motor application point is fixed (I think) stops me from getting the same 
results as if I was applying a sinusoidal body load in pychrono at the CG of a 
floating body.

Thank you in advance.

Alvaro
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