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failure parameter
相关语句
  失效参数
     Generally, the converter and controller are mainly composed of electronic elements. The failure parameter obeys the exponent distribution rule.
     一般情况下,变换器和控制器主要由电子元器件组成,其失效参数服从指数分布。
短句来源
     However, the failure parameter of the generator follows the Gauss distribution, therefore, the analytical study of its reliability is difficult to carry on with the common analytical method.
     但是发电机的失效参数为正态分布,因此,其可靠性的分析研究,用一般的解析方法是困难的。
短句来源
  故障参量
     The X-ray source controlled by the chip microcomputer is improved into the one controlled by the computer and the chip microcomputer simultaneously, realizing the allocation and operation of all parameters of X-ray source on the computer, and the real-time display of the operation and failure parameter of X-ray source.
     对单片机控制的X射线源改进为计算机与单片机同时控制,实现了在计算机上对X射线源各种参量的设置和操作,实时显示X射线源的运行和故障参量
短句来源
  损伤参量
     It is a prolongation for triaxiality factor of isotropy material. By using the triaxiality factor to modify strain range as a failure parameter and introducing a cyclic characteristic parameter for damage force to take account of alternately changed characteristic of cyclic loading,a low cycle fatigue damage model for single crystal superalloy was proposed.
     用镍基单晶应力三轴性因子修正M ises应变范围作为疲劳损伤参量,引入损伤驱动力循环特征参数反映循环载荷的交变特性,提出了单晶合金低周疲劳损伤模型。
短句来源
     By using the triaxiality factor to modify strain range as a failure parameter, effects of crystallographic orientation and multiaxial loading on fatigue life can be eliminated remarkably.
     用它修正Mises应变范围作为疲劳损伤参量,可以显著消除晶体取向和多轴载荷对疲劳寿命的影响。
短句来源
  “failure parameter”译为未确定词的双语例句
     This method can find out the mapping interrelation between parameters by net training, and produces a simulated parameter to replace the failure parameter temporarily so as to improve the reliability and veracity of the system greatly.
     该方法对各种工况进行学习,找出参数之间的内在映射关系,实时模拟产生与机组运行状态相适应的数据以临时取代失效测点,可使系统的准确性、可靠性大为提高.
短句来源
     From the numerical results, it can be seen that the nonlinear failure parameter has a significant effect on the passive earth pressure and the three translational failure mechanisms are equivalent for computing passive earth pressures.
     数值结果表明:当非线性破坏准则变为线性破坏准则时,结果与前人的成果一致;
短句来源
     At last,according to Matsuoka-Nakai failure criterion and its corresponding new transferred expressing formula,its strength failure parameter k2 value is optimized;
     最后,依据Matsuoka-Nakai破坏准则和其相应的转化型式,进一步探讨了其破坏参数k2值的确定方法。
短句来源
     In the FEM analysis of structure response under dynamic loading such as high velocity impact,the failure parameter is a important aspect of material behavior. With split Hopkinson tension bar tests and static material test at various stress states and temperatures,the effects of high strain rate,elevated temperature and stress triaxiality on the fracture behavior of 45 steel were studied.
     为了在结构碰撞效应的有限元分析中描述材料行为,通过开展45钢在不同应力状态和温度下的准静态材料力学性能实验及拉伸SHB实验,考察了应力状态三轴度、温度和应变率对材料失效应变的影响。
短句来源
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  failure parameter
This results in a change in the magnitudes of the failure parameter.
      
A crack initiating from the node where a failure first occurs is taken to propagate to the adjacent node that has the highest value of the failure parameter (the maximum tensile principal stress or the effective plastic strain).
      
The second cohesive failure parameter max used in the bilinear cohesive model described in Section 2 will be determined in this section.
      


The development of the technology of power electronics make the power system possible to replace a mechanic constant speed device by a static converter, consequently, there is a new kind of VSCF electrical power system in which the generator is directly driven by the aircraft motor appearing in recent years. As the speed of the motor is not constant, the frequency of an AC set driven by a generator is also variable, then, the converter is utilized to turn the variable frequencies of the AC set into constant...

The development of the technology of power electronics make the power system possible to replace a mechanic constant speed device by a static converter, consequently, there is a new kind of VSCF electrical power system in which the generator is directly driven by the aircraft motor appearing in recent years. As the speed of the motor is not constant, the frequency of an AC set driven by a generator is also variable, then, the converter is utilized to turn the variable frequencies of the AC set into constant ones. The main parts of the aircraft VSCF electrical power system consist of the no-brush AC variable frequency generator, converter and controller.Generally, the converter and controller are mainly composed of electronic elements. The failure parameter obeys the exponent distribution rule. However, the failure parameter of the generator follows the Gauss distribution, therefore, the analytical study of its reliability is difficult to carry on with the common analytical method. This paper focuses on the analysis of the reliability model of the aircraft's VSCF electrical power system. The Monte-Carlo method is applied in digital simulation to the reliability index of a certain-type of aircraft VSCF electrical power sytem, and thus the degree of importance of the working model in every main part is obtained to provide a theoretical basis for the development and design of this system.

随着电力电子技术的发展,用静止变换器取代机械式的恒速传动装置成为可能,因而出现了变速恒频电源系统。在变速恒频电源系统中,发电机是直接由飞机发动机来传动的。由于发动机的转速不是恒定的,因而发电机输出的交流电的频率也是变化的,故再用变换器把变频交流电变换为恒频交流电。飞机变速恒频电源系统的主要部件有无刷交流变频发电机、变换器和控制器。 一般情况下,变换器和控制器主要由电子元器件组成,其失效参数服从指数分布。但是发电机的失效参数为正态分布,因此,其可靠性的分析研究,用一般的解析方法是困难的。本文分析了飞机变速恒频电源系统的可靠性模型。应用Monte-Carlo方法对某型号飞机变速恒频电源系统方案的可靠性指标(R(t),MTBF)进行了数字仿真,得到了各主要部件的工作模式重要度,为该系统的研制设计提供了理论基础。

In the paper,the model of artificial neural network is established to describe the relationship between frequency and failure parameters (crack length and position) of rectangle plate simply supported at four sides.The model can be used in the supervision of structure failure and in the prediction of failure presence.

本文建立了四边简支矩形板的固有频率与裂纹长度及裂纹位置关系的人工神经网络模型 ,该模型可用于结构的损伤监测 ,预报故障的发生。

In this paper,the measuring service model of the gauge and measuring instruments was derived.The reliability indices of the gauge and measuring instruments were proposed and the relationship between these indices and the measuring service parameters and failure parameters were analyzed.The results of analysis may provide reference for optimization of measuring service parameters and the increase of reliabilityof gauge and measuring instruments.

为保证测量器具性能指标不超过规定的范围 ,建立测量器具的计量服务模型 ,确定了测量器具的可靠性指标 ,并对其与计量服务参数和故障特征参数的关系进行了分析和计算 .得出了测量器具可靠性指标与计量服务参数的关系是复杂的离散函数关系的结论 ,为求出t1、t2 和Tbr及Tbs等参数 ,笔者得出了这些量的数学期望 ,所建立模型可供优化测量器具计量服务参数和提高测量器具可靠性时参考 .

 
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