Multibody Analysis Comparison Between Strain-Based Beam Formulation and Absolute Nodal Coordinate Formulation

EasyChair Preprint no. 13378

Abstract

The wings of recent regional jet tend to have high aspect ratio to reduce induced drag. Because of the high aspect ratio configuration with lightweight, the wings undergo large deformations induced by aerodynamic forces. In addition, such high aspect ratio wings experience very high wing root bending moment when they encounter gust. To alleviate the gust response, a folding wing concept was proposed. When designing the high aspect ratio wings with the folding wing mechanism, a multibody simulation considering geometric nonlinearity is necessary. Owing to the slenderness of the high aspect ratio wing, geometrically nonlinear beam formulations are suitable for the simulation. In this study, two geometrically nonlinear beam formulations are compared in multibody simulations. One is absolute nodal coordinate formualtion (ANCF) and the other is strain-based beam formulation (SBBF). The major difference of them is that ANCF has a constant mass matrix, while SBBF has a constant stiffness matrix.

Keyphrases: Absolute Nodal Coordinate Formulation (ANCF), Flexible multibody dynamics, Geometrically Nonlinear Beam Formulation, Strain-Based Beam Formulation

@Booklet{EasyChair:13378,
  author = {Keisuke Otsuka and Hiroyuki Sugiyama},
  title = {Multibody Analysis Comparison Between Strain-Based Beam Formulation and Absolute Nodal Coordinate Formulation},
  howpublished = {EasyChair Preprint no. 13378},

  year = {EasyChair, 2024}}