varying stress

One method solving parameter estimation of varying stress accelerated life test

一类解决变应力加速寿命试验参数估计的方法

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The main cause for such failure was the high varying stress from the blade flutter because of its relatively small flutter margins.

叶片颤振裕度不大，在工作转速范围内产生颤振导致叶片承受较大的动应力是其疲劳断裂的主要原因。

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The results showed that the tensile strength, stress at 200% elongation, abrasion resistance, tear strength and aging resistance of natural rubber vulcanizates enhanced in varying degrees after filled with the CeO2 powder.

实验结果表明，添加氧化铈使得橡胶扯断强度、200%定伸强度、耐磨性能、撕裂强度、弹回率和老化性能有了不同程度的提高。

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Study on Modeling of Rotor Thermal Stress with Varying Coefficients

汽轮机转子热应力自适应模型研究

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Equi Strength Design of Nonhomogeneous Variable Thickness High Speed Rotating Disk under Steady Temperature Field ON THE FATIGUE LIFE WITH VARYING STRESS AMPLITUDES

在定常温度场中非均匀变厚度高速旋转圆盘的等强度设计变应力幅值下的疲劳寿命问题

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The maximum likelihood function of varying stress accelerated life is a nonlinear multi-dimension complex object function with five evaluated parameters, whose parameter estimation is easy to get into local optimization with grads descending algorithm while has low searching efficiency with global optimal algorithm.

变应力加速寿命试验的极大似然函数是高维非线性复杂目标函数，其待估参数多，采用梯度下降优化方法进行参数估计容易陷入局部极值，而采用全局优化方法又存在寻优效率低的问题。

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And set up calculating formulae on the fatigue life reliability under un varying stress amplitude and varying stress amplitude.

建立了恒幅常应力和恒幅变应力情况下疲劳寿命可靠度的计算公式。

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It is investigated that the influence of Bauschinger Effect on yield strength of tube body by using four point bending test to simulate the tube making process at varying stress strain amplitudes.

采用X65钢板在四点弯曲加载条件下，模拟输油管制管过程中不同应变量下的应力&应变过程，研究包申格效应对输油管管体屈服强度的影响。

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CIMMYT is testing yields of genetically engineered plants with the DREB gene under varying water stress.

CIMMYT正在测试不同水分胁迫情况下含有DREB基因的转基因植物的产量。

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Analysis of the statistical characteristics of the randomly varying stress in structure

结构的随机应力统计特性分析

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