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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。
In order to obtain the test data of flexibility characteristics during the experimental research on the flexible support structure of the large-size reflector of the space optical remote sensor, a compact uniaxial flexible hinge test device was designed. At the same time, Achieved end bending and bending test function. The device utilizes the principle of lever to achieve pure bending loading and restricts the pure bending component by constrained channels composed of rigid rollers so as to reduce the influence of friction on load transfer. The simulation analysis of the test shows that the lateral load deflection caused by the “L” type push rod is the main factor affecting the pure bending test, and the maximum lateral load can be controlled at 4.783 N. The experimental results are in good agreement with the results of finite element analysis and theoretical calculations. Compared with the finite element analysis results, the experimental results and theoretical calculations are slightly smaller, the maximum deviation of the experimental value of 3.87%. The device provides an effective solution for the experimental research on the flexible support of the optical reflector.