Nonlinear Modal Aeroelastic Solver for FUN3D.

机译：FUN3D非线性模态气动弹性解算器。

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A nonlinear structural solver has been implemented internally within the NASA FUN3D computational fluid dynamics code, allowing for some new aeroelastic capabilities. Using a modal representation of the structure, a set of differential or differential-algebraic equations are derived for general thin structures with geometric nonlinearities. ODEPACK and LAPACK routines are linked with FUN3D, and the nonlinear equations are solved at each CFD time step. The existing predictor-corrector method is retained, whereby the structural solution is updated after mesh deformation. The nonlinear solver is validated using a test case for a flexible aeroshell at transonic, supersonic, and hypersonic flow conditions. Agreement with linear theory is seen for the static aeroelastic solutions at relatively low dynamic pressures, but structural nonlinearities limit deformation amplitudes at high dynamic pressures. No flutter was found at any of the tested trajectory points, though LCO may be possible in the transonic regime.

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Goldman, B. D.; Bartels, R. E.; Biedron, R. T.; Scott, R. C.;
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年度 2016
页码 1-35
总页数 35
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Nonlinear equations; Aeroelasticity; Computational fluid dynamics; Differential equations; Nonlinearity; Deformation; Program verification (computers); Dynamic pressure; Trajectories; Predictor-corrector methods; Computer programming; Flutter; Flow velocity; Transonic flow; Supersonic flow; Hypersonic flow; Conical shells; Rayleigh-ritz method; Aeroshells;

机译：非线性方程;气动弹性;计算流体动力学;微分方程;非线性;变形;程序验证（计算机）;动态压力;轨迹;预测校正方法;计算机编程;颤振;流速;跨音速流动;超音速流动;高超声速流动;锥形炮弹; Rayleigh-ritz法; aeroshells;
入库时间 2022-08-29 10:46:14

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1. Computational Aeroelasticity Using Modal-Based Structural Nonlinear Analysis [J] . Medeiros Renato R., Cesnik Carlos E. S., Coetzee Etienne B. AIAA Journal . 2020,第1期

机译：基于模态结构非线性分析的计算气动弹性
2. Dynamic Aeroelasticity of Structurally Nonlinear Configurations Using Linear Modally Reduced Aerodynamic Generalized Forces [J] . Luciano Demasi, Eli Livne AIAA Journal . 2009,第1期

机译：线性模态折减气动广义力在结构非线性结构中的动态气动弹性
3. Spectrographic analysis for the modal testing of nonlinear aeroelastic systems [J] . C. C. Marsden, S. J. Price Journal of Fluids and Structures . 2008,第5期

机译：非线性气动弹性系统模态测试的光谱分析
4. A Quasi- linear Approach for Solving Aeroelastic Problems Involving Aerodynamic and Structural Nonlinearities [C] . S. Munteanu, J. Rajadas, C. Nam, AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and Materials Conference;AIAA Non-Deterministic Approaches Forum;AIAA/ASME/AHS Adaptive Structures Conference;AIAA Gossamer Spacecraft Forum;AIAA Dynamics Specialists Conference . 2003

机译：解决涉及气动和结构非线性的气动弹性问题的拟线性方法
5. NONLINEAR STOCHASTIC FLUTTER OF AEROELASTIC STRUCTURAL SYSTEMS (NON-GAUSSIAN, AUTOPARAMETRIC, MODAL INTERACTION, RANDOM PARAMETRIC, UNCERTAINTY). [D] . HEO, HUN. 1985

机译：气动弹性结构系统的非线性随机颤振（非高斯，自参数，模态相互作用，随机参数，不确定性）。
6. Modal testing for model validation of structures with discrete nonlinearities [O] . D. J. Ewins, B. Weekes, A. delli Carri -1

机译：模态测试用于离散非线性结构的模型验证
7. Modal-Based Nonlinear Estimation and Control for Highly Flexible Aeroelastic Systems [O] . Marc Artola, Norberto Goizueta, Andrew Wynn, 2020

机译：高度柔性空气弹性系统的模态非线性估计与控制

Nonlinear Modal Aeroelastic Solver for FUN3D.

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