Question: Can maplesim facilitate rigid-flexible coupling analysis?

I am now using maplesim to do research on railway vehicles. When I replace the rails with flexible beams in maplesim, I try to connect the rails and two sleepers with moving pairs, and I find that there are over-constraint problems. How to replace the rails with flexible bodies? Are the rails connected with multiple sleepers?

I hope you can give me some advice, thank you very much.

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