預期工作壽命 的英文怎麼說
中文拼音 [yùqīgōngzuòshòumìng]
預期工作壽命
英文
expected operational life-
On - line monitoring of hvcb is the precondition of predicting maintenance, is the key element of reliable run, and is the important supplement to the traditional off - line preventive maintenance in fact, the faults are made by hvcb, no matter in number or in times, is over 60 % of total faults so it has determinative importance for improving the reliability of power supply and this can greatly decrease the capital waste used by - dating overhaul in this paper, the inspecting way of hvcb mechanism characteristic is discussed the concept of sub - circuit protector is presented, the scheme that we offered has been combined with sub - circuit integrality monitoring theory, to ensure that it has the two functions as a whole according the shut - off times at rated short circuit given by hvcb manufacturer, the electricity longevity loss can be calculated in each operation, and the remained longevity can be forecast too an indirect way for calculating main touch ' s temperature by using breaker shell temperature, air circumference temperature and breaker ' s heat resistance is improved in this paper, and main touch resistance can be calculated if providing the load current msp430, a new single chip microcomputer made by ti company, is engaged to develop the hardware system of the on - line monitoring device, and special problem brought by the lower supply voltage range of this chip is considered fully
高壓斷路器所造成的事故無論是在次數，還是在事故所造成的停電時間上都占據總量60以上。因此，及時了解斷路器的工作狀態對提高供電可靠性有決定性意義；並可以大大減少盲目定期檢修帶來的資金浪費。本文論述了斷路器機械特性參數監測方法；提出了二次迴路保護器的概念，並將跳、合閘線圈完整性監視和二次迴路保護結合起來，給出具有完整性監視功能的二次迴路保護器實現方案；根據斷路器生產廠家提供的斷路器額定短路電流分斷次數，計算每次分閘對應的觸頭電壽命損耗，預測觸頭電壽命；提出根據斷路器殼體溫度和斷路器周圍空氣溫度結合斷路器熱阻來計算斷路器主觸頭穩態溫升的方法，並根據此時的負荷電流間接計算主觸頭迴路的電阻；在硬體電路設計上，採用美國ti公司最新推出的一種功能強大的單片機msp430 ，並充分考慮該晶元的適用電壓范圍給設計帶來的特殊問題；在通信模塊的設計中，解決了不同工作電壓晶元之間的介面問題，並給出了直接聯接的接線方案。Undoubtedly, deterioration and damage accumulation occur in high temperature and high pressure. with the consumption of their use, the failure accidents occur more frequently, which will bring threatening to the life of people and the poverties of enterprise. so the failure analysis and the residual life assessment of the main steam pipe become more and more urgent and important
以蠕變性能作為設計指標的主蒸汽管道是發電廠的關鍵部件，由於長期在高溫高壓的惡劣工況下運行，容易發生材質老化和損傷積累，突發性事故也會頻頻發生，給企業職工的生命安全和國家財產帶來嚴重威脅，因此對主蒸汽管道進行失效分析與壽命預測尤為迫切和重要。Strategy of repair and reinforcement on existing concrete structures in remaining service life was analyzed. 3. a method to analyze remaining fatigue life for existing concrete structures was proposed based on reliability theory, in which the number of critical fatigue cycles under a certain stress was taken as a random variable
以結構的極限疲勞循環次數作為隨機變量，基於可靠性理論提出了在役鋼筋混凝土結構疲勞剩餘壽命的預測方法，分析了多種工況下混凝土結構在未來服役期內的疲勞可靠性和疲勞剩餘壽命。
分享友人