着陆冲击试验系统设计及大型橡胶容器试验验证

为确保大型橡胶容器的运输适航性,依据中国民用航空局对运输类飞机的应急着陆过载要求,开展着陆冲击试验系统设计。通过冲击平台仿真设计与校核、波形发生器仿真设计、摆锤系统与导向机构设计,构建了着陆冲击试验系统,有效负载约达20 t,最大冲击载荷达到400 t。选取大型橡胶容器作为典型空运物资进行应急着陆实装试验验证,结果表明:冲击波形均近似为三角波,与仿真曲线波形相似,过载峰值分别为侧向1.54g、航向3.06g、9.02g、16.20g,与目标峰值最大相对误差小于3%,峰值对应时间大于50 ms,试验系统符合设计要求。该试验系统可用于空运平台的研制,对于确保飞行安全、降低研制风险、提高空运适航性具有重要的意义。

Design of landing impact test system and test verification of large rubber container

In order to assure the transport airworthiness of large rubber container, the design of the landing impact test system was carried out according to the Civil Aviation Administration of China on the emergency landing overload requirements for transport category aircraft. The impact platform was simulated and verificated, the waveform generator was simulated and designed, the pendulum system and guiding mechanism were designed, while the landing impact test system was constructed. The payload reaches nearly 20 t, and the maximum impact load reaches 400 t. The large rubber container was selected as a typical air cargo for emergency landing test verification. The results show that the waveform of the impact test is approximately triangular wave, which is simular to the waveform of the simulation curve. The overload peak is 1.54g laterally and 3.06g, 9.02g, 16.20g heading respectively. The maximum error with the target peak is less than 3%, and the corresponding time of the peak is more than 50 ms. The test system meets the design requirements. The system will be used for the development of airlift platform,which is great significance to ensure flight safety, reduce development risk and improve the airworthiness of airlift platform.