飞机起落架收放作动筒指型锁的磨损研究

发布时间：2018-04-24 00:07

本文选题：起落架 + 指型锁　；参考：《南京航空航天大学》2016年硕士论文

【摘要】：起落架是飞机起降时的重要装置。在飞机起降过程中随着起落架的收放,锁机构会完成锁定并定位以便保证安全起降。但是在使用过程中,指型锁在解锁上锁过程中会逐渐产生磨损,严重影响了指型锁的使用寿命。如果在正常的磨损范围内,指型锁可以保持正常的工作状态,但是一旦超过一定的磨损上限,指型锁的解锁轴向力就会急剧上升,从而导致起落架出现收放故障。因此,锁机构的正常工作直接关系到飞机的起降安全。本文基于某型飞机的起落架收放实验,设计了起落架作动筒内锁的解锁上锁磨损实验。该实验主要包括指型锁止动环解锁实验和指型锁脱开卡住实验。根据现有条件设计了相关的实验夹具,之后对13个材料、长度、瓣数和角度等设计参数不同的指型锁进行对比研究和分析。验证了各型指型锁在工作周期内没有超过磨损的上限,仍然能安全使用。随着现代CAE技术的发展,CAE仿真分析大幅缩短了研发时间和降低研发费用,因此越来越多的工程设计和实验使用有限元的理论来提高效。本文在实验的基础上,基于Archard磨损本构模型,使用MSC.MARC有限元软件,对指型锁在飞机工作周期内的磨损进行仿真和分析。最后,将仿真实验数据与实验结果进行对比,验证了仿真结果的可靠性。这样不但节省时间提高效率,还节省了大量的人力物力,为未来合理的锁机构设计提供了相关的参考。
[Abstract]:Landing gear is an important device for aircraft take-off and landing. As the landing gear retracts during the take-off and landing of the aircraft, the lock mechanism is locked and positioned to ensure safe take-off and landing. However, in the process of use, finger lock will gradually wear out in the process of unlocking, which seriously affects the service life of finger lock. If the finger lock can keep the normal working condition in the normal wear range, but once the upper limit of wear is exceeded, the axial force of the finger lock will rise sharply, which will lead to the landing gear failure. Therefore, the normal operation of the lock mechanism is directly related to the take-off and landing safety of the aircraft. In this paper, based on the landing gear retracement experiment of a certain aircraft, the unlocking wear experiment of the inner lock of the landing gear actuator cylinder is designed. The experiment mainly includes finger locking loop unlocking experiment and finger locking unlocking experiment. According to the existing conditions, the relative experimental fixture was designed. After that, 13 finger locks with different design parameters, such as material, length, number of lobes and angles, were compared and analyzed. It is verified that all types of finger locks are safe to use if they do not exceed the upper limit of wear in the working cycle. With the development of modern CAE technology, simulation analysis has greatly shortened the time of research and development and reduced the cost of research and development. Therefore, more and more engineering design and experiments use finite element theory to improve the efficiency. In this paper, based on the Archard wear constitutive model and MSC.MARC finite element software, the wear of finger lock during the aircraft working cycle is simulated and analyzed. Finally, the simulation data are compared with the experimental results to verify the reliability of the simulation results. This not only saves time to improve efficiency, but also saves a lot of manpower and material resources.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V226

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