Durability analysis technology and application when loading spectrum is altered;
提出一种应用分形理论分析挖掘机载荷谱的新方法。
The fatigue life of a notched specimen under random loading spectrum is evaluated by means of the present method.
用该方法分析了一个缺口试件在随机谱载下的裂纹形成寿命，结果比常规的有效系数和雨流法更接近试验结果。
This article will take the loader hydraulic system as research object; plait the loading spectrum which reflects the actual characteristics of the working load.
本文将以装载机液压系统为研究对象，编制出能反映装载机液压系统实际工作载荷特点的载荷谱。
After averaging the same flight segments by multiplying mission mix rates, then the weighted mean profiles can be obtained, which represent the composite maneuver flight loading spectrum.
将各机动飞行任务的同类任务段和同类载荷循环乘以任务混频后进行加权平均即得到机动飞行类综合载荷谱。
And it has a high precision, strong restraining random interfering noise. As a result, it makes loading-spectrum analysis more accurate.
而且该算法精确度高，抗随机噪声干扰能力强，使得载荷谱分析更加准确。
A new type of random program constant amplitude load spectrum is introduced, which is used in laboratory simulation test and life prediction of tractor components under random loading.
本文介绍了一种新型的随机程序载荷谱，以用于拖拉机零部件在随机载荷作用下的室内模拟试验与寿命预测。
Through the collection, trim, iteration and calculation of the real road loading on the engine supporting, this paper describes the study on the spacial road spectrum used on rig test.
通过对发动机支承实际道路载荷的采集、整理迭代计算得到了用于台架试验的加载谱，其结果可对发动机支承进行可靠性试验和动态性能试验。
Using the wavenumber frequency transfer function to describe the whole system consisting of the plate and the liquid loading, a general expression of the cross spectrum was derived.
用波数-频率谱传递函数表征包括弹性板和流体负荷在内的整个系统的特性，导出了噪声场互谱函数的一般表示式。
We can predict the fatigue life of structures under complex spectrum loading by the present model.
用本模型可以计算复杂谱载荷作用下的疲劳裂纹扩展寿命。
The acoustic emission regularity and spectrum characteristics of rock under cyclic loading and multi-stage loading during complete failure process were studied.
对循环加载和分级加载条件下岩石损伤破坏全过程的声发射规律和频谱特性进行了研究。
The objective of this paper is to study the effects of three dimensional constraints on fatigue crack growth under aircraft spectrum loading.
研究裂纹端部三维应力约束、塑性约束和位移约束等对谱载疲劳裂纹扩展的影响。
Methods Static isometric loading of the biceps and low back muscle was performed in 14 subjects, using FFT power spectrum and its two dimensional mapping to analyze SEMG signals from these muscles.
方法14名受试者分别参加肱二头肌和腰部脊竖肌等长运动负荷实验，取表面肌电信号进行FF T功率谱及其功率谱二维地形图分析。
The predicted lifes by using this model under spectrum loading are in good agreement with experimental data.
这些模型在一定范围内都能够预测变幅载荷下裂纹扩展。
To reduce the loading of root in a spectrum-tree, some users, which sense the same number of idle channels, are selected as roots.
为减小单个根节点的负载，选择多个能感知到相同空闲信道数量的次要用户作为根节点。
To reduce the loading of root in a spectrum-tree, some users, which sense the same number of idle channels, are selected as roots.
为减小单个根节点的负载，选择多个能感知到相同空闲信道数量的次要用户作为根节点。
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