查询词典 failure analysis

Earlier fatigue failure phenomenon of SOFIM engine connecting rod bolt is concentred.After a finite element model was established,a finite element analysis and a fatigue test were carried out.

针对SOFIM发动机连杆螺栓出现的早期疲劳断裂现象，建立了连杆螺栓的有限元模型，利用有限元方法进行了该连杆螺栓的疲劳寿命分析，并与疲劳试验进行了对比。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

This article in the collection analyzes the domestic and foreign high speed roller bit bearing research pertinent data in the foundation, in view of the present high speed roller bit bearing in the field application existence's question, through to the roller bit bearing main failure mode and the reason analysis, found the extension roller bit service life the theory basis, uses the method which the theory and the experiment unified to develop to the roller bit bearing surface strengthening technology as well as the bearing enclosure system's preliminary study, has provided a new mentality and the method for roller bit's design, further impelled the modern well drilling processing technology the development.

本文在收集分析国内外高速牙轮钻头轴承研究有关资料的基础上，针对目前高速牙轮钻头轴承在现场应用存在的问题，通过对牙轮钻头轴承主要失效形式和原因的分析，找到延长牙轮钻头使用寿命的理论依据，采用理论与实验相结合的方法开展了对牙轮钻头轴承表面强化技术以及轴承密封系统的初步研究，为牙轮钻头的设计提供了一条新的思路和方法，进一步推动现代钻井工艺技术的发展。

Based on the testing analysis of microcosmic digital image, there are smaller Fissions, higher density and even distribution under high confining pressure than under low one. Microcosmic damage mechanics of rock cracking under high confining pressure and hydraulic pressure is given. Reliable testing basis is offered to analyze further failure and stability of the noncircular cave surrounding rock under high confining pressure and high hydraulic pressure.

通过微观数字图像试验分析发现，高围压条件下大理岩断口裂纹长度小、密度大、分布相对均匀，给出高水压高围压作用下岩石破裂产生的微观损伤力学机理，为进一步分析高围压高内外水压条件下非圆形洞室围岩失稳破坏机理提供了可靠的试验依据。

A theoretical analysis of local damage in a thin ductile tube hit by a flat-nosed missile laterally is developed to predict local failure due to plugging by the beam-on-foundation model. The effect of internal press was considered, and differential equations was obtained which can predict the ballistic speed of the missile which impact the tube filled with water. It can be solved by Runge-Kutta method.

采用地基梁模型对平头弹体侧向冲击钢管的冲塞型破坏模式进行了理论分析，考虑了充压情形下内压的影响，导出了钢管在冲击过程中的运动方程，可以用龙格—库塔法进行数值求解来确定弹体冲击充液压力管道的弹道极限速度。

In DISCOURSE ANALYSIS, feedback given while someone is speaking is sometimes called back channel cues , for example, comments such as uh, yeah, really, smiles, headshakes, and grunts which indicate success or failure in communication.

话语分析中，人说话的同时所得到的反馈有时称暗示，例如 uh 、 yeah 、 really 、微笑、摇头和咕哝声这些评述，表明交际的成功与失败。

The thesis analyzes the premises and reality and the future development of capital inflowing media, centering on policy and laws, the way of co-operation, analysis the failure cases, capital choosing media, model of management and future trends.

本论文以此为选题，围绕政策法规、合作方式、失败案例分析、资本选择、经营模式以及未来走势这几个方面，来分析资本进入媒体的背景条件、现实状况和未来发展。

By statistical analysis to a large number of data collected from the reliability test of 120km/h raising speed wagon,this paper,based on the theory of reliability engineering,elaborated the reliability of the tested wagon in the field of running safety,maintenance support,failure mode effect and criticality.

通过对120km/h提速货车可靠性试验中收集的大量故障数据进行统计分析，根据18万km的阶段试验数据分析与推断，利用可靠性工程的理论，对货车提速到120km/h运行的可靠性，做出初步的结论性判断，并提出了今后在铁路车辆设计、制造、试验及维护保障管理等各方面，全面引入产品可靠性质量管理理念，进行相应的可靠性深入研究。

This paper based on the principle of having the underwater explosion as a interference source to make the guidance system of torpedos failure, and according to the similarity theory to equivalent the real situation into test model , and analysis the damage

论文文摘本文基于水下爆炸作为干扰源使鱼雷制导系统失灵的原理，应用相似理论，将实际情况等效缩比为试验模型，分析该等效模型在水下爆炸作用下的破坏情况以及对鱼雷自导系统的影响。

Through above numerical analysis of the TiN coating/substrate system, some typical rules about the fatigue failure are found:(1) the fatigue damage of a coating/substrate system appears first on the interface, then expands along the interface and to the substrate, and finally causes the coatings broken and spalled;(2) under the cyclic loadings of tangential sliding and radial extrusion, the equivalent plastic damage on the interface is mainly generated by the shear stress and the accumulated plastic contributed by the increments of shear stress. Thus the change of the shear stress is the main factor for the contact fatigue damages of coating/substrate system;(3) the frictional coefficient, external loading and coating thickness have some influence on the carrying capacity and contact fatigue life for a coating/substrate system.

通过对TiN涂层／基体系统的数值模拟分析，得到了涂层／基体系统疲劳失效的一些典型规律：(1)、涂层基体的初始损伤首先出现在交界面处，然后沿界面并向基体中扩展，最后导致涂层断裂而发生剥落失效；(2)、在切向滑动和径向挤压循环载荷作用下，交界面处的塑性损伤主要是由剪应力τ产生，塑性累积也是由于△τ的变化引起，说明循环过程中剪应力变化是影响涂层接触疲劳破坏的主要因素；(3)、材料摩擦系数、外界载荷大小以及涂层厚度都对涂层／基体系统的承载能力以及疲劳寿命都有一定影响。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。