Download PDFOpen PDF in browserSensitivity Analysis of the FFR ALI3-P Flexible Multibody FormulationEasyChair Preprint 133342 pages•Date: May 17, 2024AbstractSensitivity analysis is an extremely useful tool in optimization problems or optimal design, but its calculation is usually complex and requires a high computational effort. Among the techniques available to compute the sensitivity analysis of a set of equations, analytical sensitivities have proven to be among the most computationally efficient and accurate. This work explores the sensitivity analysis of a natural coordinate FFR formulation with constraints enforced by means of an Augmented Lagrangian Index-3 formulation with velocity and acceleration projections (FFR-ALI3-P). The sensitivities have been validated against numerical differentiation in several benchmark problems, including a vehicle model that accounts for the elastic deformation of the chassis. Keyphrases: ALI3-P, FFR, Flexibile Multibody Systems, Floating frame of reference, sensitivity analysis, vehicle
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