1 夹层FGM板的几何模型
2 夹层FGM板运动方程的建立
3 算例分析
3.1 模型验证
表2 Al/Al2O3 的材料参数 |
| 参数 | 给定值 | 参数 | 给定值 |
|---|---|---|---|
| /(N·m-2) | /m | ||
| /(N·m-2) | /m | ||
| /(kg·m-3) | /m | ||
| /(kg·m-3) | |||
| 0.3 | /(kg·m-3) |
Journal of Shenyang Aerospace University >
Analysis of the flutter characteristics of sandwich functionally graded material panels
Received date: 2025-03-23
Revised date: 2025-04-25
Accepted date: 2025-04-29
Online published: 2026-06-15
To address the delamination failure issue in composite laminates caused by interlaminar stress concentration during supersonic flight,a novel sandwich functionally graded material (FGM) panel structure was proposed. First,the nonlinear geometric relationship of the sandwich FGM panel was formulated based on the Kirchhoff thin panel theory and the von Kármán large deformation theory. The nonlinear aerodynamic forces acting on the sandwich FGM panel were simulated using the third-order piston theory. The Hamilton principle was employed to derive the differential equations of motion for the sandwich FGM panel during supersonic flight. Subsequently,the Galerkin method was introduced to discretize these differential equations of motion spatially in both the streamwise and spanwise directions,yielding the corresponding system of ordinary differential equations. Finally,the dynamic response of the sandwich FGM panel was obtained by solving the derived ordinary differential equations using the Runge-Kutta method. The results indicate that,for a constant thickness of the sandwich core,a smaller gradient index n of the core material leads to a higher flutter critical dynamic pressure; When the gradient index n of the sandwich core is less than 1.0,the flutter critical dynamic pressure exhibits a monotonic increase as the thickness ratio of the sandwich core rises; Furthermore,as dimensionless dynamic pressure increases,the motion of the sandwich FGM panel transitions progressively from static stability to limit cycle oscillation.
Wuchao QI , Deming CHEN , Sumei TIAN , Weitao ZHAO . Analysis of the flutter characteristics of sandwich functionally graded material panels[J]. Journal of Shenyang Aerospace University, 2026 , 43(2) : 1 -9 . DOI: 10.3969/j.issn.2095-1248.2026.02.001
表2 Al/Al2O3 的材料参数 |
| 参数 | 给定值 | 参数 | 给定值 |
|---|---|---|---|
| /(N·m-2) | /m | ||
| /(N·m-2) | /m | ||
| /(kg·m-3) | /m | ||
| /(kg·m-3) | |||
| 0.3 | /(kg·m-3) |
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
谭小俊.复杂环境下梁板结构屈曲与颤振研究[D].哈尔滨: 哈尔滨工业大学,2017.
|
/
| 〈 |
|
〉 |