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在不同飞行姿态及飞行条件下,可变体机翼智能结构及驱动器根据外部条件及控制指令,可以实现翼体自适应动态变形,表现出良好的空气动力学性能。由于翼体结构应力场与温度场的分布和作用形式复杂多样,因此需要对结构进行多物理场耦合分析,并准确获取翼体结构应变分布的有效信息。为此,采用COMSOL Multiphysic多物理场数值分析软件,对可变体机翼后缘缩比模型进行了应力场与温度场的模拟仿真研究,并通过构建分布式光纤Bragg光栅传感网络实现对可变翼体结构关键部位应变分布信息的监测。仿真研究与实验测试结果均能够准确反映翼体结构在应力场与温度场耦合作用下翼体翼表结构的应变变化情况。
Under different flight attitude and flight conditions, the flexible wing structure and the actuator can realize adaptive dynamic deformation of the wing body according to the external conditions and the control instructions, and exhibit good aerodynamic performance. Due to the complexity and diversity of the stress field and the temperature field in the wing structure, multi-physics coupling analysis of the structure is required and effective information about the strain distribution of the wing structure is accurately obtained. Therefore, by using COMSOL Multiphysic multiphysics numerical analysis software, the simulation of the stress field and the temperature field of the variable wing trailing edge reduction ratio model was carried out. By constructing the distributed fiber Bragg grating sensing network, Monitoring of Strain Distribution Information in Key Parts of Vane Structure. Both simulation and experimental results can accurately reflect the change of the wing structure of the wing body under the coupling of stress field and temperature field.