复合材料尾减管加载变形仿真分析与试验验证

Simulation Analysis and Test Verification of Loading Deformation to the Connecting Pipe of Tail Gearbox

复合材料尾减管发挥着支撑直升机尾减速器和尾桨的重要作用。由于受尾桨的推力作用尾减管在使用过程中会沿推力方向产生变形,若变形过大会影响尾桨的正常运行进而对直升机安全产生威胁。为掌握复合材料尾减管在限制载荷作用下的变形情况并评估仿真分析的准确程度,对尾减管变形状况进行了有限元仿真和试验验证,仿真与试验的边界条件设置均模拟产品的真实装机状态。研究表明,复合材料尾减管变形位移的试验结果最大值为9.22mm,仿真结果比试验结果的最小值相比高出0.69mm,仿真与试验结果的偏差较小,吻合程度较高。

Composite connecting pipe of tail gearbox plays an important role in supporting the helicopter tail rotor.Due to the thrust of the tail rotor,it will deform along the thrust direction in the course of use.If the deformation is too large,the operation safety of the tail rotor will be affected and the safety of the helicopter will be threatened.In order to grasp the deformation of composite connecting pipe of tail gearbox under limited load and evaluate the accuracy of simulation analysis,the simulation and experimental verification of deformation of connecting pipe of tail gearbox are carried out.The boundary conditions of simulation and test are set to simulate the real assembly state of the product.The results show that the maximum deformation displacement of connecting pipe of tail gearbox is obtained from the test results 9.22mm.The difference between the simulation result and the minimum value of the test result is 0.69mm.The simulation results are in good agreement with experimental results.