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首页> 外文学位 >Integrated structural design, vibration control, and aeroelastic tailoring by multiobjective optimization.
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Integrated structural design, vibration control, and aeroelastic tailoring by multiobjective optimization.

机译：集成的结构设计，振动控制和通过多目标优化进行的气动弹性剪裁。

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摘要

The integrated design of a structure and its control system was treated as a multiobjective optimization problem. Structural mass, a quadratic performance index, and the flutter speed constituted the vector objective function. The closed-loop performance index was taken as the time integral of the Hamiltonian. Constraints on natural frequencies and aeroelastic damping were also considered. Derivatives of the objective and constraint functions with respect to structural and control design variables were derived for a finite element beam model of the structure and constant feedback gains determined by Independent Modal Space Control. Pareto optimal designs generated for a simple beam and a tetrahedral truss demonstrated the benefit of solving the integrated structural and control optimization problem. The use of quasi-steady aerodynamic strip theory with a thin-wall box beam model showed that the integrated design for a high aspect ratio, unswept, straight, isotropic wing can be separable. Finally, an efficient modal solution of the flutter equation facilitated the aeroelastic tailoring of a low aspect ratio, forward swept, composite plate wing model.
机译：结构及其控制系统的集成设计被视为多目标优化问题。结构质量，二次性能指标和颤振速度构成了矢量目标函数。将闭环性能指数作为哈密顿量的时间积分。还考虑了固有频率和气动弹性阻尼的约束。针对结构和控制设计变量的目标函数和约束函数的导数，是针对结构的有限元梁模型和由独立模态空间控制确定的恒定反馈增益而得出的。为简单的梁和四面体桁架生成的帕累托最优设计证明了解决集成结构和控制优化问题的好处。将准稳态空气动力学带理论与薄壁箱形梁模型结合使用表明，高纵横比，未掠过，笔直，各向同性的机翼的集成设计是可分离的。最后，颤振方程的有效模态解决方案促进了低纵横比，前掠复合板机翼模型的气动弹性剪裁。

著录项

  • 作者

    Canfield, Robert Arthur.;

  • 作者单位

    Virginia Polytechnic Institute and State University.;

  • 授予单位 Virginia Polytechnic Institute and State University.;
  • 学科 Mechanics.;Aerospace engineering.
  • 学位 Ph.D.
  • 年度 1992
  • 页码 172 p.
  • 总页数 172
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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