疲劳累积损伤规律是疲劳研究中的关键问题之一。
Fatigue accumulative damage rule is one of the most critical problems in the research of fatigue.
在此基础上，提出了一个描述材料累积损伤的模型。
On this basis, a mathematical model describing the variation of material damage is established.
提出了疲劳累积损伤度和剩余疲劳寿命的实用计算方法。
The practically used method of how to evaluate the accumulated fatigue damage and residue fatigue life is introduced.
在频域内分别用等效应力法和等效窄带法计算了累积损伤。
The accumulated fatigue damage was calculated in frequency domain by equivalent stress method and equivalent narrow band method respectively.
另外，通过统计检验，验证线性累积损伤也服从正态分布。
In addition, it is proved that the lineal cumulative damage also observes the normal distribution by means of statistical testing.
此外，利用线性累积损伤法则对蠕变-疲劳寿命进行了预测。
In addition, a linear damage summation method is chosen to predict creep fatigue lifetime.
本文提出了考虑残余应变刚度下降的复合材料疲劳累积损伤模型。
The research work in this paper is included following: 1, A fatigue model based on the 'Strain Equivalent Hypothesis' is presented.
因此，对变幅疲劳寿命和累积损伤理论做进一步研究是很有意义的。
So it will result in error when calculating the fatigue life, and it is significant to study on the variable fatigue life and the cumulative damage theories.
简要介绍了经典的疲劳累积损伤理论和几个典型的损伤变量定义式。
The main classic fatigue cumulative damage theories and the representative definitions of damage variable have been introduced briefly.
糖尿病性视网膜病是失明的一主要病因，它是视网膜小血管长期累积损伤的结果。
Diabetic retinopathy is an important cause of blindness, and occurs as a result of long-term accumulated damage to the small blood vessels in the retina.
疲劳累积损伤分布规律是结构疲劳可靠性分析与设计的关键内容之一。
The fatigue damage cumulative rule plays a key role on the structure design against fatigue.
本文阐述了已有的混凝土结构疲劳累积损伤理论和疲劳损伤识别原理。
In this dissertation, the theory which is known of concrete structure fatigue cumulative damage and damage detection is narrated.
文中给出了损伤演变路径和描述该损伤演化行为的疲劳累积损伤方程。
The damage evolutionary path and the damage equation which depicts the fatigue damage accumulation are introduced also in this paper.
对于承受随机载荷的钢桥，其寿命依赖于这种疲劳载荷造成的累积损伤。
The estimated life of a steel bridge subjected to random load in highly dependent upon damage accumulation caused by fatigue load.
建筑结构在地震作用下的破坏主要是由结构的低周疲劳累积损伤引起的。
The main destruction of constructions suffering from earthquake is brought by the accumulated damage of structures under low cycle fatigue.
业已证明，累积损伤的马尔可夫链模型对累积损伤过程提供了综合的描述。
Markov chain models of cumulative damage have been provided a comprehensive descriptions of cumulative damage processes.
因此，新定义的疲劳损伤阀值与线性累积损伤之间在分布形态上是一致的。
Therefore, the distribution configuration of the fatigue damage threshold is the same as the distribution configuration of lineal cumulative damage.
累积损伤方法已被广泛应用于复合材料的各种结构损伤分析及强度预测中。
The progressive damage method has been widely applied to analyze damage accumulation and predict strengths of all kinds of composite structures.
结果表明炉管的累积损伤具有局部性，下部高温段的焊缝损伤较母材严重。
The results show the accumulated damage of reformer tubes is localized, and the damage of the weldment located at the lower part of reformer tubes is more serious than that of the parent metal.
结果表明，在不同应力水平下，推进剂的累积损伤基本符合线性累积损伤规律。
The results show that the cumulative damage of propellants under the different stress levels agrees with linear rule.
本文根据线性累积损伤理论，给出了农机焊接件在谱载荷作用下的寿命估算方法。
According to the linear cumulative damage theory, a method for estimating life for welding structure of farm machinery acted under load spectrum is given.
提出了一个用于计算非对称循环载荷下材料低周疲劳寿命的累积损伤模型和方法。
In this paper, a method of computation for the low-cyclic fatigue life under the action of asymmetrical cyclic load is proposed.
并从理论和实验两方面证明了该法则能够正确反映载荷次序效应等疲劳累积损伤规律。
The present cumulative damage rule is able to correctly describe the loading order effect, about which a rigorous theoretical and experimental proofs was provided in this paper.
并从理论和实验两方面证明了该法则能够正确反映载荷次序效应等疲劳累积损伤规律。
The present cumulative damage rule is able to correctly describe the loading order effect, about which a rigorous theoretical and experimental...
以不同应力水平下的破坏率相等进行损伤等效转换出发，建立了新的非线性累积损伤模型。
A new non-linear accumulate damage model was derived from the concept of equal failure probabilities under different stress levels.
为了在频域内方便准确地估算高耸结构的风振疲劳累积损伤，提出了一种改进的等效窄带算法。
To conveniently and accurately evaluate the wind-induced accumulated fatigue damage of high-rise structures in frequency domain, an improved equivalent narrow band method was proposed.
结论：超声能够对皮下真皮层起到治疗作用，一定时间间隔的重复扫描不会引起皮肤的累积损伤。
Conclusions: Focused ultrasound has therapeutic effect on dermis but no accumulated damage to the skin treated at regular intervals.
建立了基于模糊累积损伤的构件疲劳可靠性干涉模型，导出了模糊可靠度评定的一般公式和仿真方法。
Fatigue reliability interference model is established based on fuzzy cumulative damage of components, then general formula and simulation methods of fuzzy reliability estimation are derived.
采用随机波浪谱和线性疲劳累积损伤理论对导管架式海洋平台在波浪荷载作用下的疲劳可靠性进行研究。
The linear fatigue of the jacket structure was evaluated by using wave spectrum analysis theory and theory of linear cumulative damage.
采用随机波浪谱和线性疲劳累积损伤理论对导管架式海洋平台在波浪荷载作用下的疲劳可靠性进行研究。
The linear fatigue of the jacket structure was evaluated by using wave spectrum analysis theory and theory of linear cumulative damage.
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