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1.Conventional rice variety Teqing was employed for studying the physiological changes and the hull role to grain-filling at grain formation stage.
以常规水稻品种特青为材料,对谷在水稻结实过程中的作用和某些生理变化进行了探讨。收藏指正
2.Because increasingly conventional fixed value method can’t adapt to evaluation demands of engineering construction which expect structure safety index to be much more exact, it is very important to carry through reliability research on overall longitudinal strength of hull and evaluate change of hull structure reliability during enlistment, which help to set up corresponding scheme to ensure safety of hull structure and settle theoretical foundation only to establish reliability analysis specifications of overall longitudinal strength of hull.
由于传统的定值论方法已日益无法适应工程建设力求结构安全指标精确可靠的评估要求,因此开展船体结构总纵强度可靠性研究、评估船舶结构在使役期内的强度和可靠性变化情况,对于建立合理的检测、维护和修理方案以确保船舶结构的安全可靠至关重要,同时也将为船体总纵强度可靠性分析规范的制定奠定理论基础。收藏指正
3.Abstract: Fatigue cracks in ship hull structures are most likely to occur in the highly stressed structural details.The conventional fatigue analysis is largely dependent on the determination of stress concentration factors (SCFs) at the locations considered.This paper is concerned with the stress concentration of cutout in transverse web for longitudinal stiffener.A series of finite element models is carried out for the stress analysis of predefined structural details.The tabulated SCFs of typical cutouts (ABS Tanker Rules) in transverse web for longitudinal stiffeners are presented based on the finite element analysis (FEA) results.
文摘:疲劳裂纹往往发生在船舶结构的局部高应力区,而疲劳分析结果通常取决于任何准确确定结构的应力集中系数.本文研究为铺设纵骨而在舱壁板上开孔的应力集中,采用有限元方法对预先给定的结构进行应力分析,基于有限元计算结果给出了舱壁板典型开孔(参见ABS油船规范)的应力集中系数表.收藏指正
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