面向多学科设计的高效高保真非线性气动弹性降阶模型研究

项目名称： 面向多学科设计的高效高保真非线性气动弹性降阶模型研究

项目编号： No.11272005

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 陈刚

作者单位： 西安交通大学

项目金额： 80万元

中文摘要： 目前工程上广泛应用的气动弹性设计方法，主要采用基于线性气动理论的低保真气动弹性模型，难以满足气动非线性诱导的非线性气动弹性设计精度要求。本项目在青年基金面向气动弹性仿真分析的自适应鲁棒非定常流场降阶模型（Reduced Order Model,ROM）所取得的进展基础上，进一步探索面向气动弹性设计的高效高精度ROM及其构造方法，建立基于ROM技术的复合材料机翼非线性颤振气动弹性剪裁方法,为基于CFD/CSD耦合数值模拟的气动/结构一体化设计提供方法支撑。拟解决的关键科学问题是：气动参数和结构参数在设计空间变化时，如何保持非线性气动弹性ROM的高保真度和高效率。本项目主要特色是延续性强，多学科交叉特点鲜明；主要创新点是提出面向设计的不依赖结构模态的高保真度非线性气动弹性ROM和基于ROM技术的复合材料机翼气动弹性剪裁方法。

中文关键词： 非线性气动弹性；降阶模型；气动伺服弹性；阵风减缓；颤振抑制

英文摘要： The popular engineering aeroelastic optimization is based on the low-fidelity panel aerodynamic model, which is unsuitable for the nonlinear aeroelasticity induced by nonlinear aerodynamics. Based on the recent advances on the robust adaptive unsteady flow field reduced order model (ROM) , which is supported by the young researchers’ foundation, we further investigate the design oriented aeroelastic reduced order model and propose a new nonlinear dynamic aeroelastic tailor method for composite structural wings based on the high-fidelity aeroelastic reduced order model. The new method would provide basic algorithms for the high-fidelity CFD/CSD couple simulation based nonlinear aeroelastic tailor and integration optimization. The key issue is how to keep the accuracy and efficiency of the aeroelastic reduced order model when the design parameters are varying in the design space .The innovations include the design oriented high-fidelity high-efficiency nonlinear aeroelastic reduced order model which is insensitive to the varying of fluid and structral design parameters, and the new nonlinear aeroelastic tailor method for composite structural wing based on aeroelastic reduced order models.

英文关键词： nonlinear aeroelasticity；reduced order model；aeroservoelasticiy；gust alleviaton；flutter suppression