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根据民用飞机发动机吊挂部段静力试验技术需求,研制了一套用于吊挂部段静力试验的试验系统,解决了吊挂支持模拟、加载边界模拟等关键技术,完成了吊挂应急着陆、航向侧移两种危险工况试验,并结合试验台架-吊挂有限元分析模型对吊挂进行了静强度分析。试验结果表明,试验系统工作稳定可靠,吊挂在应急着陆等工况下未发生有害塑性变形,其强度、刚度满足设计要求。对比显示:试验最大应力与有限元分析相对误差均小于8%,验证了分析模型的准确性。试验结果可作为民用飞机发动机吊挂部段强度性能的评定依据,有限元建模方法可应用于吊挂部段改型设计。
According to the technical requirements of the static test of the civil aircraft engine suspension section, a set of test system for the static test of the suspension section was developed, which solved the key technologies of suspension support simulation and loading boundary simulation, completed the suspension emergency landing and heading Two kinds of dangerous conditions test, and combined with the test bench - hanging finite element analysis model of the static strength of the suspension analysis. The test results show that the test system works stably and reliably, and no harmful plastic deformation occurs under the conditions of emergency landing and so on. Its strength and rigidity meet the design requirements. The comparison shows that the relative error between the maximum stress and the finite element analysis is less than 8%, which verifies the accuracy of the analytical model. The test results can be used as the assessment basis for the strength performance of the suspension section of the civil aircraft engine, and the finite element modeling method can be applied to the retrofit design of the suspension section.