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首页> 外文期刊>Journal of the American Helicopter Society >Effective Static and Dynamic Finite Element Modeling of a Double Swept Composite Rotor Blade
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Effective Static and Dynamic Finite Element Modeling of a Double Swept Composite Rotor Blade

机译：双扫复合转子叶片的有效静态和动态有限元建模

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摘要

The paper concerns mechanical responses of helicopter blades made of composite materials. Structures with complicated geometries are modeled by using both beam and solid finite elements. The adopted one-dimensional kinematics only encompasses pure displacements; therefore, the connection with three-dimensional elements can be carried out with ease. Contributions to elastic and inertial matrices deriving from nodes shared by beams and solids are merely summed together through a standard assembling procedure. Stress, free vibration, and time response analyses have been performed on different configurations. A straight metallic rotating structure and a swept-tip blade made of an orthotropic material have been considered for verification and validation purposes. Current results have been compared with experimental data and numerical solutions available in the literature. Furthermore, a straight and a double-swept blade with a realistic airfoil have been studied. For the straight configuration, the one-dimensional results have been compared with finite element solutions obtained with commercial software. The methodology enabled complicated stress distributions and coupling phenomena to be predicted with reasonable accuracy and affordable computational efforts.
机译：本文涉及由复合材料制成的直升机叶片的机械响应。具有复杂几何形状的结构是通过使用光束和固体有限元进行建模的。采用的一维运动学仅包括纯粹的位移;因此，可以轻松地执行与三维元件的连接。通过光束和固体共享的节点的弹性和惯性矩阵的贡献仅通过标准组装过程总结在一起。对不同的配置进行了应力，自由振动和时间响应分析。已经考虑了由正渗透材料制成的直线金属旋转结构和扫尖叶片进行验证和验证目的。将当前结果与文献中可用的实验数据和数值解决方案进行比较。此外，已经研究了具有现实翼型的直线和双扫刀片。为了直线配置，将一维结果与商业软件获得的有限元解决方案进行了比较。该方法能够以合理的准确度和经济实惠的计算工作预测复杂的应力分布和耦合现象。

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  • 来源
    《Journal of the American Helicopter Society》 |2020年第3期|032003.1-032003.12|共12页
  • 作者

    Matteo Filippi; Enrico Zappino; Erasmo Carrera; Bruno Castanie;

  • 作者单位

    Department of Mechanical and Aerospace Engineering Politecnico di Torino Torino Italy;

    Department of Mechanical and Aerospace Engineering Politecnico di Torino Torino Italy;

    Department of Mechanical and Aerospace Engineering Politecnico di Torino Torino Italy;

    Institut Clement Ader Material and Structure Group University of Toulouse Toulouse France;

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