高超声速气流中受热壁板的非线性气动弹性声振特性分析

项目名称： 高超声速气流中受热壁板的非线性气动弹性声振特性分析

项目编号： No.11472216

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 杨智春

作者单位： 西北工业大学

项目金额： 88万元

中文摘要： 高超声速飞行器机体壁板严酷的声热服役环境，使得壁板颤振这种传统的气动弹性力学问题演变为流-固-热-声多物理场耦合下的受热壁板气动弹性声振问题。通过对受热壁板的非线性气动弹性声振系统建模，受热壁板非线性气动弹性声振特性分析和参数影响分析以及气动弹性效应对受热壁板声振特性的影响规律分析，阐明声场-流场-温度场耦合作用下壁板结构产生复杂动力学现象的力学机理，以及多物理场耦合下壁板气动弹性声振稳定性问题的产生机制，构建高超声速气流中受热壁板的非线性气动弹性声振响应预测分析框架，弄清噪声场和温度场对壁板在其气动弹性声振稳定性亚临界和超临界区域的力学行为的影响规律，为高超声速飞行器机体壁板结构的动强度设计提供非线性气动弹性声振分析模型和分析方法。对发现高超声速流场中壁板结构更加复杂的动力学现象，为多场耦合下的动力学稳定性研究拓展出新的研究方向，起到一定的促进作用。

中文关键词： 声振；气动弹性；非线性动力学；高超声速气流；受热壁板

英文摘要： Due to the severe service environment of panel structure of hypersonic flight vehicle, the conventional panel flutter evolves as the aeroelastic vibroacoustic problem of heated panel subject to the coulping of multi-physics including fluid, solid, thermo and acoustic fields. In this project, with the modelling of nonlinear aeroelastic vibroacoustic system of heated panel, the analysis nonlinear aeroelastic vibroacoustic characteristics of heated panel together with parametric studies, analysis of the influence of aeroelastic effect on the vibroacoustic characteristics of heated panel will be performed. The aim of this projet is to illuminate the mechanism of complex dynamics phenomenon of panel structure subject to the coupling of fluid-thermo-acoustic fields, and to clarify the stability mechanism of panel aeroelastic vibroacoustic system subject to mutli physics. As the result, the framework for the prediction of nonlinear aeroelastic vibroacoustic response will be established. The effects of acoustic and thermo fields on the subcritical and supercritical beheaviours of panel aeroelastic vibroacoustic stability will be made clear. The project will provide nonlinear aeroelastic vibroacoustic analysis model and prediction method for the dynamic strength design of airframe panel of hypersonic vehicles. The research on this project will also find new complex dynamic phenomenon for the panel structure in hypersonic airflow field, and promote the studies on dynamic stability subject to multi-physics.

英文关键词： vibroacoustics;aeroelasticity;nonlinear dynamics;hypersonic airflow;heated panel