本文選題：起落架 + 指型鎖�。� 參考：《南京航空航天大學(xué)》2016年碩士論文

【摘要】：起落架是飛機起降時的重要裝置。在飛機起降過程中隨著起落架的收放,鎖機構(gòu)會完成鎖定并定位以便保證安全起降。但是在使用過程中,指型鎖在解鎖上鎖過程中會逐漸產(chǎn)生磨損,嚴(yán)重影響了指型鎖的使用壽命。如果在正常的磨損范圍內(nèi),指型鎖可以保持正常的工作狀態(tài),但是一旦超過一定的磨損上限,指型鎖的解鎖軸向力就會急劇上升,從而導(dǎo)致起落架出現(xiàn)收放故障。因此,鎖機構(gòu)的正常工作直接關(guān)系到飛機的起降安全。本文基于某型飛機的起落架收放實驗,設(shè)計了起落架作動筒內(nèi)鎖的解鎖上鎖磨損實驗。該實驗主要包括指型鎖止動環(huán)解鎖實驗和指型鎖脫開卡住實驗。根據(jù)現(xiàn)有條件設(shè)計了相關(guān)的實驗夾具,之后對13個材料、長度、瓣數(shù)和角度等設(shè)計參數(shù)不同的指型鎖進行對比研究和分析。驗證了各型指型鎖在工作周期內(nèi)沒有超過磨損的上限,仍然能安全使用。隨著現(xiàn)代CAE技術(shù)的發(fā)展,CAE仿真分析大幅縮短了研發(fā)時間和降低研發(fā)費用,因此越來越多的工程設(shè)計和實驗使用有限元的理論來提高效。本文在實驗的基礎(chǔ)上,基于Archard磨損本構(gòu)模型,使用MSC.MARC有限元軟件,對指型鎖在飛機工作周期內(nèi)的磨損進行仿真和分析。最后,將仿真實驗數(shù)據(jù)與實驗結(jié)果進行對比,驗證了仿真結(jié)果的可靠性。這樣不但節(jié)省時間提高效率,還節(jié)省了大量的人力物力,為未來合理的鎖機構(gòu)設(shè)計提供了相關(guān)的參考。
[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.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V226

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