An idealized 1:2 scale demonstrator and a numerical parameter optimization algorithm are proposed to closely reproduce the deformation shape and, thus, spatial strain directions of a real aerodynamically loaded civil aircraft spoiler using only four concentrated loads. Cost-efficient experimental studies on demonstrators of increasing complexity are required to transfer knowledge from coupons to full-scale structures and to build up confidence in novel structural health monitoring (SHM) technologies. Especially for testing novel sensor systems that depend on or are affected by mechanical strains, e.g., strain-based SHM methods, it is essential that the considered lab-scale structures reflect the strain states of the real structure at operational loading conditions. Finite element simulations with detailed models were performed for static strength analysis and for comparison to experimental measurements. The simulated and measured deformations and spatial strain directions of the idealized demonstrator correlated well with the numerical results of the real aircraft spoiler. Thus, using the developed idealized demonstrator, strain-based SHM systems can be tested under conditions that reflect operational aerodynamic pressure loads, while the test effort and costs are significantly reduced. Furthermore, the presented loading optimization algorithm can be easily adapted to mimic other pressure loads in plate-like structures to reproduce specific structural conditions.
翻译:提出一个理想化的1:2比例显示器和数字参数优化算法,以精确复制变形形状,从而只使用四重集中载荷,精确复制真正空气动力上载的民用机解体机的空间压力方向; 需要对日益复杂的示威者进行具有成本效益的实验性研究,以便把知识从优惠券转移到全面结构,并增强对新型结构健康监测技术的信心; 特别是为了测试依赖或受机械菌株影响的新式传感器系统,例如基于压力的SHM方法,必须使所考虑的实验室规模结构反映实际结构在实际装货条件下的紧张状态; 进行精细模型的精度元素模拟,以便进行静态强度分析和与实验性测量进行比较; 理想化演示的变形和空间压力方向的模拟和测算与实际飞机毁损器的数字结果相关; 因此,在反映操作性空气动力压力负荷的条件下,可以测试基于压力的SHM系统,而试验努力和成本则大大降低; 此外,所提出的压缩压结构结构可以很容易调整,在特定机压条件下进行。