載劣壽命 的英文怎麼說
中文拼音 [zǎilièshòumìng]
載劣壽命
英文
carrier lifetime-
Since the economic conditions are limited, the bearings with the excellent capability and heavy carrying capacity could be hardly chosen and used, and many bearings are demand to be serviced sustained, whose service life has reach or outreach the design life. the accidents are always taken place for some reasons such as very difficult maintenance, badly working conditions and eyeless using
我國由於經濟條件的限制，不僅難以做到全面選用性能優良、承載能力高的低速重載滾動軸承，而且對多數已經達到或超過理論設計壽命的軸承仍要求能夠繼續服役，加之維修難度較大，工作環境惡劣，盲目使用易引發事故。Beams are researched, and the relation between strains of corroded re - bars and fatigue life of beams are obtained. the main research contents and conclusions are as following : 1. under the fatigue loads, the overstrain of concrete approximately coincidences three stages strain development and accumulation rule, and the mechanical property of concrete is deteriorated
鑒于實際工程中大量存在腐蝕鋼筋混凝土結構承受反復荷載作用，但其力學性能研究不多的問題，本論文進行了銹蝕鋼筋混凝土梁抗彎疲勞試驗，研究了應力比和鋼筋銹蝕率對銹蝕鋼筋混凝土梁抗彎疲勞性能的影響，得出了銹蝕鋼筋的應變與構件疲勞壽命之間的關系曲線，主要研究內容及結論如下: （ 1 ）在循環荷載下，混凝土殘余變形基本符合三階段變形規律，力學性能劣化，疲勞損傷積累。With the wide application and development of fracturing techniques, in the oil field fracturing pump valve requires enduring higher pressure, stronger impact load, and obtaining better comprehensive performance so that it has longer natural life in worse working condition
隨著壓裂工藝的廣泛運用和發展，現場上要求壓裂泵閥承受更高的壓力，更大的沖擊載荷，具有更好的綜合性能，以保證在更加惡劣的工況下有較高的使用壽命。
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