The thesis considers 3 kinds of imperfection forms: the welded-joint imperfection, the consistent mode imperfection and the random imperfection.
全文对筒仓引入了3种缺陷，即周圈焊缝凹陷缺陷、一致模态缺陷和随机缺陷。
In this case, welded joint with smaller volume are more favorable.
在这情况，用比较小的体积焊接关节是更有利的。
In order to ensure the use safety of pressure container, we must test the welded joint angularity and stagger joint.
为了保证压力容器的使用安全，必须检测焊接棱角度和错边量。
This provides a certain theory and criterion for us to further research the fracture-resistant capability of welded joint .
这为进一步研究焊接接头的抗断性能分析提供了一定的理论基础。
High quality stainless pipe valve and seamless welded joint can ensure absolutely air conurbation and durability of pipe system.
高品质不锈钢的管道阀门，无缝焊接的连接口，以保证绝对的气体密闭性和管道系统的耐用性。
Welded joint is a mechanical heterogeneous body, and the mechanical heterogeneity has great effect on dynamic fracture behaviour of welded joint.
焊接接头是一个宏观力学不均匀体，力学不均匀性对焊接接头的动态断裂行为有重要的影响。
Results shows that penning in the weakest region of welded joint may strengthen welded toe obviously, and substantially improve ductility and strengthen of weldment.
结果表明：锤击处理可明显强化焊接接头，特别是随焊锤击能够明显强化焊趾，提高焊件的强度和塑性。
The microstructure and mechanical properties of welded joint of ultra-fine grained rebar were studied.
研究了超细晶粒钢筋焊接接头的组织和力学性能。
The influence of RE on the microstructure and hardness of welded joint was studied by the experiments adding RE in electrode covering.
通过在药皮中添加稀土合金的试验，研究了稀土对高钒焊条焊补铸铁接头组织与硬度的影响。
Optimization design method of welded structure was put forward with welded joint fatigue damage as constraints.
提出考虑焊接接头疲劳损伤约束的焊接结构抗疲劳优化设计方法。
The stress intensity factors K1 of various position of welded joint were measured by single edge precracked tensile specimen.
用单边预裂纹拉伸试样测定了焊接接头各部位的应力强度因子K1值。
In the welding craft, the welded joint position affects one of welding quality factors.
在焊接工艺中，焊缝位置是影响焊接质量的因素之一。
The test result show, it possess higher crack resistance, satisfactory weldability, and im-prove mechanical properties of the welded joint.
结果表明，它有较高的抗裂性和良好的焊接性，并能提高焊接接头的机械性能。
The results show that the tensile properties of LF6 alloy and its welded joint are greatly affected by low temperature.
研究结果表明：低温对LF 6合金及其焊接接头的拉伸性能具有显著影响。
To meet the development of steels used for the large engineering machinery, fatigue crack growth rates of a high strength low alloy steel HG80 and welded joint were investigated.
为适应大型工程机械焊接用钢需要，对低合金高强度钢HG80及其焊接接头的疲劳裂纹扩展速率进行了研究。
Separate the spot-welded joint on the side wind ow aperture of the rear window using the spotweld cutter.
用点焊切割工具分离后窗的侧窗接缝的点焊接合处。
The results indicated that impact absorbed energy of heat-affected zone in welded joint of X70 pipeline steel were proportional with shearing area on the whole.
结果表明：X70管线钢焊接接头热影响区冲击试样的冲击功与断口剪切面积基本成线性比例关系，冲击功越高，剪切面积越大。
This method can be used to measure the JIC of welded joint.
该方法能够用于测试焊接接头的J _值。
The effect of welding process on the microstructure and the strength of welded joint is discussed in the present paper.
探讨了焊接工艺过程对气压焊焊接接头显微组织及强度的影响。
Mechanical properties of pure titanium laser welded joint were tested by universal testing machine.
采用电子万能试验机测试钛金属激光焊接头的力学性能。
The paper studies the fatigue failure probabilistic model of the weld zone in welded joint using probabilistic fracture mechanics and reliabilitistic analysis methods.
本文采用概率断裂力学方法和可靠性分析方法，针对压力容器焊接接头的组织不均匀特点，研究了焊缝区疲劳失效概率模型。
The mechanical properties of steel WDB620 are introduced. Some traditional tests about the mechanical properties and cracking resistance on its welded joint have been made.
介绍了超低碳贝氏体wdb620钢的力学性能，用几种传统的焊接性试验方法对该钢焊接接头的力学性能及抗裂性进行了研究。
The coarse grain zones of laser welded joint of super fine grain steel show good toughness.
超细晶粒钢激光焊接接头粗晶区有较好的韧性。
Porosity is apt to occur in deep penetration laser beam welding, which has severe influence on the mechanical properties of laser welded joint.
针对激光深熔焊过程中易出现的气孔问题，作者提出光束摆动激光焊接减小气孔倾向的工艺。
Welded joint category, Joint type No. , Joint efficiencies.
焊接接头分类，焊接接头（焊缝）类型，焊接接头系数。
A new compound treating method of improving fatigue performance of high-strength welded joint is that firstly treated the welded toe by TIG-dressing and then performed ultrasonic peening.
提出一种对接头焊趾先进行一遍tig熔修处理，然后再实施超声波冲击的复合处理新方法用来改善焊接接头的疲劳性能。
However, the interfacial failure tendency of low match welded joint is less man those of medium and high match welded joint.
其中低匹配接头的界面蠕变损伤程度较轻，界面失效倾向低于中匹配和高匹配接头。
However, the interfacial failure tendency of low match welded joint is less man those of medium and high match welded joint.
其中低匹配接头的界面蠕变损伤程度较轻，界面失效倾向低于中匹配和高匹配接头。
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