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.
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.
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.
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.
根据疲劳累积损伤理论，提出了新形式的疲劳损伤演化方程，与试验结果对比，该方程能较好地反映新材料的损伤演化规律。
A new fatigue damage evolution equation was proposed according to the fatigue accumulative damage theory, the effectiveness of which was verified by experimental results.
本文在大量实验的基础上提出了对焊接节点采用断裂力学的方法和对螺栓球节点应用累积损伤理论估算它们疲劳寿命的计算方法。
Finally, the methods for calculating fatigue life based on fracture mechanics for welded node and cumulative damage theory for bolted sphere node respectively have been presented.
应用提出的全程分析方法和三维逐渐累积损伤理论，对层合板的冲击过程以及冲击后含损伤层合板在拉伸载荷下的破坏过程进行详细分析。
The impact damage process and residual tensile strength after impact of laminated composites are analyzed by the whole-process analysis method and 3D progressive damage theory.
依据疲劳损伤累积理论，确定了公轨两用钢桁桥轨道横梁与整体节点连接头验证性疲劳试验的试验荷载。
According to fatigue damage accumulation theory, test load of verified fatigue test on rail across beam and welded connections with integral joint of combined steel truss bridge was gotten.
比较各种疲劳损伤累积理论计算方法的优缺点。
The advantages and disadvantages of the fatigue damage cumulative rules are discussed.
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.
一般的线性损伤累积理论忽略了高频率低疲劳应力所引起的构件疲劳损伤，致使预测结果与实际寿命相差很大。
But the common linear fatigue damage cumulative rule neglects the fatigue damage which is brought by the high frequency and low stress.
介绍了疲劳累积损伤模型，并对不同载荷谱作用下的结构疲劳寿命预测公式进行了理论推导，为后面的计算分析奠定了理论基础。
A cumulation damnification model is introduced. The formulae of structure fatigue lives prediction are deduced to form the basis of the following calculation and analysis.
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...
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...
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