在相同动应力幅值条件下，频率越高，强度越高；
The shear strength increases with increasing frequency in the same dynamic amplitude.
文中还给出了对应于不同可靠度下的最大容许应力幅值。
Themaxium range of allowable stress under different reliability is given.
着重研究了不同循环历史对后面循环稳定应力幅值的影响。
The authors have especially investigated the effect of different cyclic history on the amplitudes of stabilized stresses.
结果表明预应力辊内、外表面处的应力幅值有了较大的降低。
The results illustrate that the values of stress at both inside and outside surfaces of prestressed pull-straightening roller are much lower.
起重机钢结构的疲劳寿命计算，可采用应力比法或应力幅法。
Calculation of crane metal structure on fatigue life may be carried out according to either stress ratio or stress amplitude in related structure.
棘轮应变和棘轮应变幅都会随着平均应力和应力幅的增大而增大。
Ratcheting strain and strain range will increase with the average stress and stress range increasing.
提出了依据宽带随机谱功率密度函数求解等效应力幅的半解析公式。
The semi-analytical solution for evaluating ESR from spectral density function of wide-band random loading is presented.
对试验结果进行分析可得：动应力幅值对试样的轴向动应变影响显著；
The results show that the dynamic stress level has strong effect on dynamic axial strain.
重点分析了应力幅值、波形、频率等因素对岩石疲劳破坏寿命的影响规律。
It was emphasized that the fatigue life of rock sample was influenced by stress amplitudes, waveforms and frequencies.
选取典型线路的载荷谱，根据静强度计算的结果，折算出对应评估点应力幅；
Through choosing typical load spectrum and the results of the static calculation, the stress range of the evaluating point is accessed.
结果显示动态应变呈循环蠕变状态，蠕变的大小、速度与循环应力幅值有关。
The experimental results showed that the dynamic strain has feature of cyclic creep. Cyclic loading affected the creep and creep speed.
疲劳寿命(Nf)：在某一指定应力幅值下，引起疲劳失效的应力循环总数。
Fatigue life (Nf). The total number of stress cycles that will cause a fatigue failure at some specified stress amplitude.
结果表明，应力幅值的增加会导致合金高温疲劳寿命的下降及使变形机制改变。
The results show that the increase of stress range value would result in decreasing the high temperature fatigue lifetime of the alloy and the difference of the deformation mechanism.
通过岩石试件的能量有一个最大的极限，该极限实质上是一个应力幅值的极限。
A maximum limit of the energy which can be transmitted through a rock specimen was found.
压缩空气冷却的间歇加载超声试样，在全应力幅范围均为夹杂物引起的内部破坏。
Under ultrasonic interval loading with air cooling, it all occurred at an internal inclusion in the whole stress amplitude level.
当轴向应力与剪应力幅值的比值保持不变时，砂土液化强度随着椭圆面积的增大而降低。
For the same ratio of two stress components, the resistance to liquefaction of saturated sand decreased with the increasing area of the elliptical stress path.
根据这个结果，可以将此模型计算出的热应力和机械应力合成计算汽包或联箱的应力幅。
T he stresses scopes can be calculated by combining the drum or header thermal and mechanical stresses which are obtained from this model.
笔者通过对回转窑的托轮轴进行力学分析，导出托轮轴等效对称循环应力幅的计算方法；
By mechanical analysis of the shaft of supporting wheel, a formula to calculate symmetrical cycle is derived.
本文介绍了塔式起重机钢结构安全寿命评估中的应力幅及应力幅谱系数的计算方法和过程。
This paper describes the calculation method and process of stress amplitude and stress amplitude spectrum to evaluate the safety life time of steel structure for tower crane.
最后通过模态扩展计算得到圆角危险截面圆弧上各点在疲劳试验过程中的弯曲正应力幅值。
The bending normal stress amplitudes of the nodes in the critical section near crankshaft fillet were obtained by modal expanded computation.
通过淬火可以获得高强度、高韧性的铝合金，同时淬火后分布于毛坯中的残余应力幅值很大。
Although the strength and toughness of aluminum alloy 7075 can be increased greatly by quenching, this process will result in large magnitude of residual stress.
通过应力控制，研究了幅值比，平均应力，应力幅，加载率对棘轮应变以及棘轮应变幅的影响。
Through the stress-controlled test the effect of the amplitude ratio, the average stress, stress amplitude and loading rate on the ratcheting strain and strain range are studied.
一组叫做表面破坏模式的S-N曲线，它发生在高应力幅短寿命区，是由试样表面晶体滑移引起的。
One is called the S-N curve of surface fracture mode. It is governed by a crystal slip on the specimen surface, which occurs in the region of short fatigue life and high stress amplitude level.
用循环计数法求出载荷及应力幅频率分布，用概率密度函数拟合，为疲劳设计提供可靠性高的数据资。
The loads and the distribution of stress amplitude frequency are obtained by cycle count and reliable data for fatigue design are provided by probability density function fit.
经过预力学循环的材料在应力幅值较小时模量随其升高，而较高时降低，主要和内部位错密度上升有关。
When the stress amplitude is small, modulus of materials after pre-mechanical cycling increased with the stress amplitude, and down when it is higher.
提供的公式可用来估定合乎实用的疲劳应力幅值，表明现行规程中提供的疲劳容许应力指标需要加以修正。
The proposed formula used to evaluate the allowed fatigue stress range shows that a new amendment for the criterion of allowable fatigue stress provided in the current code is necessary.
在近场地震动作用下双层隧道下层的地震应力幅值要比上层的地震应力幅值大，在远场地震动作用下则相反；
The seismic stress amplitude of the lower layer is larger than that of the upper layer under near-field ground motion, and under far-field ground motion the condition is opposite.
通过本文的研究分析，基本掌握了三种节点的应力分布规律，将会对用热点应力幅建立疲劳计算方法提供依据。
Through the study and analysis of this paper, it will offer the important basis for the method of fatigue design by hot spot stress amplitude.
在某些情况下，如进行复杂应力条件下的疲劳素损伤分布分析，疲劳失效寿命和应力幅水平的连续分布模型更有意义。
In some cases, the continuous distribution model of fatigue failure life and stress amplitude level is more valuable in analyzing the damage of ponogena under complicated stress.
本文将虚拟样机技术与计算机随机模拟方法结合，探讨了通过计算机仿真的方法获得桥式起重机主梁应力幅谱的基本途径。
The paper expounds a way to get stress amplitude spectrum of main girders of overhead traveling crane through computer simulation combining virtual prototype technology and computer random simulation.
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