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Fast Computational Aeroelastic Analysis of Helicopter Rotor Blades

机译:直升机旋翼桨叶的快速计算气动弹性分析

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The use of a new aeroelastic computer framework called Flexit is described and the framework is used to analyse the dynamic aeroelastic behaviour of a four-bladed helicopter main rotor, Flexit implements a loose coupling between unsteady vortex lattice method (UVLM) and numerical solution of the inhomogeneous Filler-Bernoulli partial differential equation (PDE). The framework Is fast because most of the intensive computational functionality is performed on GPU using NVIDIA CUDA technology, and this makes it suitable for use in the early design stages. The UVLM algorithm uses a free wake model, and solution of the Euler-Bernoulli PDE is approximated using a finite difference algorithm that Includes a term to take account of centrifugal forces. The results of simulations are compared with analysis performed with CFD and FSI tools.
机译:描述了使用一种称为Flexit的新型气弹计算机框架,并使用该框架来分析四叶片直升机主旋翼的动态气弹行为。Flexit在非定常涡旋格子法(UVLM)和数值模拟的数值解之间实现了松散耦合。非均质的Filler-Bernoulli偏微分方程(PDE)。该框架之所以快速,是因为大多数密集计算功能是使用NVIDIA CUDA技术在GPU上执行的,因此适合在早期设计阶段使用。 UVLM算法使用自由尾迹模型,而Euler-Bernoulli PDE的解决方案是使用有限差分算法(包括一个考虑离心力的项)来近似的。将模拟结果与使用CFD和FSI工具执行的分析进行比较。

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