多轮多支柱起落架飞机强度试验支持系统研究及应用

Research and Application of Strength Test Support System of Multi-wheel and Multi-strut Landing Gears Aircraft

多轮多支柱起落架飞机特点是主起落架数量较多,且试验机及设备质量较大,单支柱起落架承载受限,因此试验过程中无法采用单个主起落架作为试验支持点,但选择多个主起落架作为支持点则造成飞机静不定,因此设计了一种试验支持系统。借鉴连通器结构,应用帕斯卡原理及静压支撑原理将支持点起落架通过液压系统进行虚拟联合,形成一种类等臂杠杆,保证所联合支持点的起落架受载一致,结合前起落架实现飞机静定支持。对该支持系统进行了功能验证,结果表明:该系统完全能够满足试验支持的要求。该系统已成功应用于飞机结构强度试验,并取得了良好效果。

The multi-wheel and multi-strut landing gears aircraft has a large number of main landing gears and its testing machine and equipment have a large weight,so the single main landing gear cannot be used as the test support point during the test due to its limited bearing capacity.While using the multiple main landing gear as support points will cause the aircraft statically indeterminate.A test support system was designed,in which a lever similar to the equal-arm was formed by using a hydraulic system to virtually combine the supporting landing gear based on the structure of the connector,the principle of Pascal and the static pressure support principle.The lever ensured the load consistency of the landing gear at the joint support points and achieved the static support of the aircraft by combining the nose landing gear.The function of the support system was verified.The results show that the system can fully meet the requirements of test support.The system was applied to aircraft structural strength test successfully and obtained a good result.