失效分析

Through the analysis of cause of slurry valve rod failure and its improvement,the life span of the Y-type discharge valve is over one time longer than before.

通过对放料阀阀杆失效原因的分析与改进，使Y型放料阀的寿命延长一倍以上。

Fracture analysis of intermediate tie rod was carried out by metallography, scanning electron microscope and EDS.

采用金相显微镜、扫描电镜、电子能谱仪等方法对钻井泵中间拉杆破断失效进行了分析。

The comprehensive mechanical properties of 6CrW2Si steel shear blade were demanded according to its failure forms and service conditions.

在对6CrW2Si钢剪刃失效方式和服役条件分析的基础上，提出了剪刃的综合力学性能要求。

The results show that the most dangerous position is near the joint of two-level series-wound mechanism, in which the failure happened easily.

从模态分析的结果可知，传动机构各构件危险部位多发生在靠近两级串联机构相连处附近，其失效多发生在这些部位。

By analyzing the causes of the failure of bearing sealing in a certain device of screw conveyer ,the structure of packing box was improved and the combined packing was selected,and the nonleakage of the bearing sealing was attained.

分析螺旋输送器轴封失效原因，通过改造填料函结构，选择组合填料密封，实现了螺旋输送器轴封的无泄漏。

In order to improve the life of impeller and the efficiency of sand pump ,the metallography structure and chemical composition of the failure impeller are analyzed and the hardness measurement for different location is carried out.

为了提高砂泵叶轮的使用寿命及砂泵效率，对失效砂泵叶轮的金相组织、化学成分进行分析，并对不同部位进行硬度测定，结果表明砂泵叶轮材料为中锰球铁。

A study was performed of the randomness of external loads on high arch dams,including flood,earthquake,landslide of mountains,etc.,the weakening of concrete strength of arch dams and rock strength of dam foundation,and the fuzziness of evaluation criterion.The disadvantages of conventional deterministic assessment methods for the safety of arch dams based on the strength theory and stability theory were analyzed respectively.It is suggested that fuzzy mathematics theory should be introduced to safety evalua...

研究高拱坝洪水、地震、山体滑坡等外载荷，坝身混凝土、坝基岩石材料强度弱化等的随机性，以及评价准则的模糊性；分析了高拱坝分别基于强度理论和稳定理论确定性评价方法的不足，提出应该利用模糊数学方法解决具有随机性、模糊性的高拱坝安全评价问题；建立了基于结构可靠度理论的高拱坝失效概率故障树模型并给出了具体算例。

Based on the durability characteristics of prestressed concrete structures,the durability limit states of carbonation and chloride ion attack are defined,respectively.Durability predicting models on the basis of reliability mathematics and stochastic processes are constructed,and the pure theoretical formulae of failure probability of prestressed concrete structures are analyzed.

根据预应力混凝土结构的耐久性特点，分别定义了结构构件在碳化环境和氯离子侵蚀环境下的耐久性极限状态，建立了以可靠性数学和随机过程为理论基础的数学模型，并对耐久性失效概率进行了理论分析。

Through analyzing the bird-striking process and the energy dissipation mechanisms, it is understand clearly that the roles of each components of the wing slat, which will be helpful in designing the bird strike resistance of large aircrafts.

通过分析整个结构鸟撞的损伤失效过程，以及各部件能量耗散机理，明确机翼前缘缝翼结构各个部件在抗鸟撞设计中的作用，这些对于我国的大型飞机抗鸟撞设计将有参考价值。

With this method, the change of microstructres and mechanical properties of castiron under the condition of thermo—mechancal cycled load can be obtained, and the failure behavior of the ingot mould can be analysed, which provide impotant bases for optimum design of ingot mould.

利用该实验方法可以再现钢锭模的实际使用状态，可获得在热—力循环载荷作用下铸铁的组织结构及力学性能的变化规律，进一步地可分析钢锭模的各种失效行为，为钢锭模结构优化设计提供重要的依据。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。