为了在空间光学遥感器大尺寸反射镜柔性支撑结构的试验研究过程中获得柔度特性试验数据, 设计了一种结构紧蹙的单轴柔性铰链试验装置, 采用该装置在材料拉伸试验机上同时实现了端部弯曲和纯弯曲试验功能。该装置利用杠杆原理实现纯弯曲加载, 并采用由刚性辊子组成的约束通道对纯弯曲组件进行约束, 从而降低了摩擦对载荷传递的影响。试验过程的模拟分析表明, “L”型下推杆引起的横向偏载是影响纯弯曲试验的主要因素, 最大横向偏载可控制在4.783 N。试验结果和有限元分析结果及理论计算值取得了很好的一致性。与有限元分析结果相比, 试验结果和理论计算值都稍偏小, 试验值最大偏差为3.87%。该装置为光学反射镜柔性支撑的试验研究提供了有效的解决方案。

To obtain the test data from the experimental research on the compliance factors of the flexure support structure of a large scale reflector used in an airborne image sensor, a compact single-axis flexure hinge experimental setup was proposed and designed. By using this experimental setup, end-bending and pure moment bending experiments of the single-axis flexure hinge could be achieved on a common single-axis Material Testing System(MTS) . This setup utilizes the leverage principle to realize the pure moment loading on the single-axis MTS and takes the side constraint configuration which is composed of several sets of rigid rollers to constrain the pure moment loading sub-assembly.By these ways, the effect of the friction on the load transmission was reduced greatly.Furthermore, the virtual simulation of the pure moment bending process was performed. It indicates that the side force stemmed from the constraint of “L” pushing component is the main influence factor on the bending processing, and the maximum side force can be controlled at 4.783 N. In order to verify the test data, Finite Element Analysis(FEA) and theoretical calculation were employed. The comparison shows that the test results are concident with FEA results and theoretical results well, and test results and theoretical results are slightly smaller than FEA results. Compared with FEA, the maximum relative error of the test data is only 3.87%, which indicates that this experimental setup is a good solution for study of flexure support structures used in optical reflectors.