将计算单裂纹结构基频的方法推广到求含多处裂纹梁弯曲振动的近似基频。
An approximate method of calculating the fundamental frequency of bending vibrations of multi-cracked beams is proposed on the basis of a modification of the method for single-cracked structures.
得到了单裂纹条件下的理论解及其与规则排列的双裂纹实验结果高度吻合的计算结构。
The calculation results for the theoretical solution of the single crack are coincident with the experiment ones for double cracks arranged regularly.
基本思想是首先利用圆盘状单裂纹之解以及局部坐标展开法将裂纹群问题化为求解一组线代数方程。
The basic idea is to use the single crack solution and the expansions of the local coordinates to reduce the complicated problem into a set of linear algebraic equations.
统计模拟结果显示，与单裂纹情形相比，多裂纹情况下零件的无泄漏寿命及从检测到泄漏到失稳断裂的时间间隔都有明显缩短。
The simulation results show that the existence of multiple cracks might lead to much shorter leak-free time and much shorter allowable response time compared with those in single crack situation.
第三章研究了具任意形状裂纹复合材料平面在单压头作用下的接触问题。
Contact problem of compound material plane with cracks under a rigid punch action is studied in the third chapter.
针对单弧度弯曲大变形无裂纹轴校直问题，根据广义预测控制理论，建立了多步校直行程预测算法。
However to the large deformation shaft without crack, general predictive theory has been applied to built up the multi-steps straightening stroke predictive algorithm.
首先建立单一微裂纹在单轴压缩荷载作用下的力学模型，求出裂纹端部的应力分量。
A mechanical model is built firstly for single microcrack under uniaxial compression loading, and the stress component of microcrack end is calculated.
结果表明，在饺皮中添加磷酸单酯淀粉，能降低饺皮裂纹率，增加饺皮的弹性和口感，使饺子汤沉淀物减少。
As a result the wrapper of boiled dumpling has lower slight crackle rate, better elasticity and taste, and clearer hot water by adding SMEP to it.
本文以齿轮动力学为基础，推导并建立了单级齿轮传动的一种齿轮失效的数学模型，即：齿根裂纹数学模型。
This article, first, mathematical models of one kind of gear fault in one— stage gearbox (the fatigue crack on root of tooth) are established on the basis of gear dynamics.
特殊裂纹尖端单节点二次单元包括近裂纹尖端位移近似级数展开第二项。
Special crack-tip SNQE includes the second term of the asymptotic series expansion of the displacement fields near the crack-tip.
最后对圆形夹杂附近单平行裂纹问题进行了研究。
The problem of a single parallel crack near a circular inclusion was also studied.
此模型首先给出了多个失效模式系统失效概率敏度与单夹杂裂纹扩展寿命失效概率敏度之间的关系；
The relationship of sensitivity for the system failure probability was firstly constructed between multiple failure modes and single failure mode.
应用二维单侧容限系数公式，提出了一种测定金属材料疲劳裂纹扩展速率的小样本方法。
A small sample method for testing fatigue crack growth rate curve of steel was presented in this paper using a formula of two-dimensional one-side tolerance factor.
基于对裂隙岩石的细观CT试验，对含有单一裂纹的贵溪红砂岩在单轴疲劳荷载作用下的损伤扩展机理和演化过程进行了初步的试验研究。
Based on real time CT testing, primary testing study of fatigue failure and deformation mechanism of red sandstone has been completed under uniaxial compression condition.
以混凝土单轴拉压损伤为基础，给出了单元弹性损伤本构关系，分析了裂纹尖端损伤微裂区尺寸，定义了有效应力强度因子，给出了I型裂纹损伤断裂判据。
Mesoscopic damage size on the top of crack is analysed, the effective stress strength factor is defined, the mode I crack damage fracture criteria is presented.
建立单颗骨料混凝土试件，探讨界面强度对混凝土宏观强度的影响，同时探讨骨料形状对裂纹扩展的影响。
Then single aggregate concrete specimens is established, the influence of interface strength to the macro-strength is discussed, while the shape of aggregate on the crack extension is investigated.
实验结果表明，单次涂敷法制备的薄膜在干燥过程中产生裂纹，系统的研究表明，该裂纹的产生与干燥时间和烧结温度等无关。
The results show that when gelatinizing method was used, cracks emerge during evaporation, and systematic research show that it has no relation with evaporation time and sintering temperature.
等双轴应力较单轴应力状态下的裂纹扩展速率减慢，而纯剪切状态下的裂纹扩展速率加快。
In these areas, they were slower in equibiaxial case and faster in pure shear compared to crack growth rates in uniaxial loading.
并用压坯单重递减法试验证实，当将压模收缩比增加到1 2 2以上时，可以保证压坯内孔不出现裂纹。
The test of single compact weight decrease proved that when the shrinkage ratio of the compacting die is increased to over 1.22, there is no more crack initiated in the compact inner hole.
并用压坯单重递减法试验证实，当将压模收缩比增加到1 2 2以上时，可以保证压坯内孔不出现裂纹。
The test of single compact weight decrease proved that when the shrinkage ratio of the compacting die is increased to over 1.22, there is no more crack initiated in the compact inner hole.
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