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电子科技大学成都学院本科毕业设计论文
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外文文献
外文文献
原文
AFP reported on August 30, 2010, Qantas Airways (Qantas Airways) a plane from San Francisco to Sydney in a Boeing 747-438, 25000 feet high air engine failures occur, when the time was carrying 231 passengers and crew. On April 17, according to the Australian transport safety bureau (ATSB) show the survey report shows that the accident was caused by metal cause turbine blade fatigue fracture.
According to the report, the Boeing 747 jet at the San Francisco international airport, 15 minutes after takeoff due to engine failure happened 4 aircraft violent vibration. Fault engine vent burst Mars and burst into flames, which leads to the engine shell burst and falling debris. Fortunately, the crew immediately shut down the engine and its trouble, in the end the plane landed safely to the San Francisco international airport. Survey shows that when the engine failure occurs at the same time, the rupture occurred on both sides of the turbine shell, debris flying out from the hole and hit the underside of the wing, fortunately only caused the scratches on the surface of the wing.
ATSB said its and engine maker Rolls Royce (Rolls-Royce) agree, think that the most likely cause is the cause of the incident metal cause turbine blade fatigue fracture. ATSB according to the report, \ Royce, according to a survey of the incident consists of a secondary low pressure turbine blade metal caused by fatigue fracture. Subsequently, the rotor imbalance makes the low pressure turbine bearing failure, and eventually lead to disintegration of parts and falling debris.\
Luo, luo, the company said in this kind of low pressure turbine, similar metal fatigue fracture of the situation in the past 23 years in a total of 40 million hours of flight operations that never happened. , but after the investigation, the company decided to install stronger in the low pressure engine bearing in order to reduce the probability of failure.
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电子科技大学成都学院本科毕业设计论文
ATSB said the malfunctioning engine checks have been carried out in March 2009, low pressure turbine bearings and turbine blades are in accordance with the standard maintenance procedures for the maintenance. ATSB said: \ of the parts within the service life, and have carried on the reasonable maintenance.\ And issue the engine several times before 4 flight data, the data shows all parameters are within the normal range.
A few weeks after the incident, another qantas flight from Singapore of the airbus A380 passenger plane engine air explosion accident happens, force qantas grounded its A380 fleet and to conduct a comprehensive safety inspection.
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外文文献
译文
据法新社报道，2010年8月30日，澳洲航空（Qantas Airways）一架由旧金山飞往悉尼的波音747-438型客机在25000英尺的高空中发生引擎故障，当时机内共搭载了231名乘客和机组人员。据4月17日澳大利亚运输安全管理局（ATSB）出示的调查报告显示，该起事故是由于金属疲劳导致涡轮叶片断裂引起的。 报告称，这架波音747客机在旧金山国际机场起飞15分钟后，由于4号引擎发生了故障造成飞机发生剧烈震动。故障引擎排气孔迸发火星并起火，导致引擎外壳破裂并掉落碎片。所幸的是，机组人员立即关闭了故障引擎并返航，最终飞机安全降落至旧金山国际机场。调查报告同时显示当引擎发生故障时，涡轮外壳的两边都发生了破裂，碎片从大洞中飞出并击中机翼的下侧，所幸的是只造成了机翼表面的擦痕。
ATSB称其与引擎制造商罗尔斯·罗伊斯（Rolls-Royce）达成共识，认为最有可能引发此次事件的原因是金属疲劳导致涡轮叶片断裂。ATSB报告称，“ 罗尔斯·罗伊斯的调查显示，此次事件是由一片二级低压涡轮的叶片金属因疲劳断裂而引发的。随后，转子失衡使得低压涡轮的轴承发生故障，并最终导致零件解体并掉落碎片。”
罗·罗公司表示，在这种低压涡轮中，类似金属疲劳断裂的情况在过去23年总计4千万小时的航班运营时间中从未发生过。但此次调查之后，罗·罗公司决定在低压引擎上安装更加坚固的轴承以减少此类故障发生的概率。
ATSB称，发生故障的引擎在2009年3月进行过检查，低压涡轮的轴承和涡轮叶片都按照标准维护流程进行了维护。ATSB表示：“所有的零件都在使用寿命之内，并且都进行了合理的保养。”并出具了4号引擎之前几次飞行的数据资料，资料显示所有的参数均在正常范围内。
此次事件之后几周，澳航的另一架从新加坡起飞的空中客车A380客机发生了空中引擎爆炸事故，迫使澳洲航空停飞其A380机队并进行全面安全检查。
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