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Improved Aircraft Tire Life through Laboratory Tire Wear Testing and Computational Modeling

机译:通过实验室轮胎磨损测试和计算模型改善飞机轮胎寿命

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Aircraft tire wear is a complex phenomenon that depends on a multitude of different interdependent variables. Due to the multitude of variables, there is currently no qualification test or accurate method for predicting tire life. While improving tire life has shown to save as much as 14 million dollars over the lifetime of certain aircraft, the present United States Air Force (USAF) method for realizing that savings is an expensive and time intensive Life Cycle Cost (LCC) evaluation program. In an attempt to perform more predictive laboratory wear testing, the USAF commissioned a 168inch internal drum dynamometer (168i) designed specifically for aircraft tire wear testing. The 96th Test Group, Aerospace Survivability and Safety Operating Location (96 TG/OL-AC), Landing Gear Test Facility's (LGTF) 168i has demonstrated the ability to comparatively wear test tires; however, its predictive wear capabilities require further development. Results from these comparative wear tests have highlighted the possibility for generating simple tire wear predictive testing schemes based on tire, brake, and aircraft system level parameters. From these results, an initial predictive tire wear testing program is presented and discussed. To assist predictive laboratory testing, a Finite Element Method (FEM) computational model has also been introduced in an attempt to simulate an aircraft's Missionized Profile (taxi, takeoff, and landing). These trends demonstrate that predictive tire wear testing on the 168i coupled with FEM computational modeling can be used to predict tire life before fielding the tire.
机译:飞机轮胎的磨损是一个复杂的现象,取决于许多不同的相互依存变量。由于变量众多,目前尚无用于预测轮胎寿命的鉴定测试或准确方法。虽然提高轮胎寿命已显示在某些飞机的生命周期内节省多达1400万美元,但美国空军(USAF)的这种节省成本的方法是一项昂贵且耗时的生命周期成本(LCC)评估程序。为了进行更具预测性的实验室磨损测试,美国空军委托专为飞机轮胎磨损测试设计的168英寸内部鼓式测功机(168i)。第96测试小组,航空航天生存能力和安全操作位置(96 TG / OL-AC),起落架测试设施(LGTF)168i展示了比较磨损测试轮胎的能力;但是,其可预测的磨损能力需要进一步发展。这些比较磨损测试的结果突显了基于轮胎,制动器和飞机系统级别参数生成简单的轮胎磨损预测测试方案的可能性。根据这些结果,提出并讨论了初始预测轮胎磨损测试程序。为了帮助进行实验室预测性测试,还引入了有限元方法(FEM)计算模型,以模拟飞机的任务剖面(出租车,起飞和着陆)。这些趋势表明,在168i上进行的预测轮胎磨损测试与FEM计算模型相结合,可用于在轮胎出厂前预测轮胎寿命。

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