航空发动机管路振动应力原位抑制试验

为解决航空发动机管路振动应力超限问题,提出航空发动机管路振动应力原位抑制概念,制定了管路振动应力原位抑制流程,提炼出基于管路基本管型、卡箍基本约束方式的振动应力原位抑制方法;结合发动机整机试验,对管路系统振动应力测试截面、试车程序进行了分析,并将所建立的分析流程和方法应用到某型发动机管路系统设计和试验中。结果表明:振动应力原位抑制后的管路系统承受住了实际工作环境的考验,验证了流程和方法的有效性;管路两端管接头焊接处、与附件相连接头处、刚性接地卡箍处,是应力较大的区域,应进行重点监控;采用3 min试车方案可在保证测量数据准确有效的前提下,降低测试成本并提高1倍的测试效率。管路振动应力原位抑制流程和方法可为航空发动机管路系统的设计、振动应力测试及抑制提供参考。

Experimental on Situ Control of Vibration Stress in Aeroengine Pipelines

Aiming at the problem of over limit vibration stress of aeroengine pipelines,situ control concept of vibration stress in aeroengine pipelines was put forward,situ control flow of vibration stress of pipelines was established,and the method of situ control vibration stress based on the basic pipelines type and the basic restraint mode of clamps was extracted.Combined with the engine test,the test section and test program of vibration stress of pipelines system were introduced,the established analysis flow and method were applied to the design and test of an engine pipeline system.The results show that the pipelines system with situ control can withstand the test of the actual working environment and verify the effectiveness of the process and method.The welding of pipe joints at both ends of the pipeline,the connector with accessories and the rigid grounding clamp are areas with large stress,which should be monitored,the 3-min test plan can reduce the test cost and improve the test efficiency by double on the premise of ensuring the accuracy and effectiveness of the measurement data.The flow and method of insitu control of pipeline vibration stress can provide reference for the design of pipelines,vibration stress test and control.