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根据飞机空中试验用转顶基座及金属支架结构静力试验技术需求,研制了一套试验系统,解决了转顶基座及金属支架结构支持模拟、加载边界模拟等关键问题。对载荷进行等效处理,设计加载假件,采用载荷偏移与力偶施加相结合的方法施加力矩,分别完成了五级风载荷下4种工况的设计载荷试验和极限载荷试验,以及八级风载荷下其中第4工况的极限载荷试验。考核了结构的危险部位应力值及结构安全余量。试验结果表明,该试验系统工作稳定可靠,转顶基座及金属支架在设计载荷试验工况下未发生有害塑性变形,其强度、刚度满足设计要求。上述试验结果可作为该结构强度、刚度性能的评定依据,同时为后续结构研究的有限元建模提供数据支持。
According to the requirements of the static test technology of the aircraft roofing base and the metal support structure, a set of test system was developed to solve the key problems such as the support structure of the support base and the metal support structure and the simulation of the loading boundary. Equivalent treatment of the load, design and loading of false parts, the use of load offset and force coupled to exert a combination of methods to exert torque, respectively, under the five wind load in four conditions of the design load test and the ultimate load test, and eight The fourth load under wind load test. Assessment of the structure of the dangerous parts of the stress and structural safety margin. The test results show that the test system works stably and reliably. No harmful plastic deformation occurs on the top base and the metal support under the design load test conditions, and the strength and rigidity meet the design requirements. The above test results can be used as the basis for evaluating the strength and stiffness properties of the structure, and provide data support for the finite element modeling of subsequent structural studies.