力学

Among them, the first main part is the selection of material parameters, and it has great effect on the validity of the computation result. The second part is predigestion of geologic model and mechanics model adopted. Compared with the two factors above, computation method adopted has less effect on computation result, but sometimes, it is very important for some special problem such as localization shearing damage.

其中，力学参数的选取是第一位的，对计算结果的正确与否影响最大；其次是地质模型的简化及所采用的力学模型；所采用的计算方法对计算结果的影响与前两个因素相比虽然较小，但对某些特殊问题有时又非常重要。

Friction tests in moving water and field sheer tests and seepage model tests and the effects of seepage defending and rough ratio tests and the capacity of resisting from frozen bulge and ice pressure. 2. Through the series track ageing tests of geosynthetics for 14 years, if the covering is 40cm thick and the initial strength is more than 500N/5cm, the geosynthetics can be used for at least 50 years, most to be more than 100 years. Under the same conditions, the strength and elongation of geotextile are both decrease, and for geomembrance the strength increased in early days. One important ageing index for geomembrance is embrittlement.

2通过工程现场14年的取样，进行老化试验分析，结果显示，土工合成材料在40cm厚以上岩土严密保护的条件下，初始强度大于500N/5cm，使用年限至少可达50年，多数情况可超过100年；在同等条件下，土工织物老化在力学性能上的表现是强度和延伸率都呈下降趋势，而多数土工膜在初期力学性能上表现是强度增加延伸率下降，到后期强度和延伸率才都呈下降趋势，脆化是衡量土工膜老化性能的重要指标。

Assuming that the plastic deformation ofmaterial can be given by the internal states of material and theirevolution laws, a principal fibre bundle structure and the correspondentrelationships between the geometrical characterization and themechanical properties of the structure are obtained.

以连续介质力学内变量理论为基础，建立了一个以材料内部微结构变量为底流形，材料外部变形状态为对应纤维的材料状态纤维丛模型，使材料的力学特性与模型的几何性质自然对应起来。

Mechanical properties and combusition characteristics were affected evidently by the solid grain configuration and its character. Mechanical propertiesof the material system could be improved by adopting RDX and proper granularpropellants granularity rank-match. It is favorable to obtain progressivity burning effect byaffiliating increasing burning surface propellant grains. Affiliating fast burning componentthese burning rate regulator in the bond system can quicken burning rate of propellants andimprove burning progressivity.

固体颗粒形态及其性质对力学性能和燃烧性能具有较大的影响，采用RDX与适当颗粒度的固体发射药的粒度级配有利于改善力学性能，加入增面燃烧的发射药颗粒，有利于获得渐增性的燃烧效果，在粘合剂体系中加入速燃组份等燃速调节剂，可加快发射药的燃气生成速率，改善燃烧的渐增性。

Mechanic properties and indices of rockburst proneness of typical rocks of Dongguashan deposit are tested.

对冬瓜山矿体及围岩的典型岩石进行了常规岩石力学试验和部分岩爆力学性能试验。

The real borehole axis is not an ideal straight line, but a helical line with arbitrary curvature, so the contact problem between the down-hole string and the borehole face is a kind of arbitrary contact nonlinear mechanics problem, which can not be solved by the common methods from material mechanics and structural mechanics.

实际的井眼轴线不是理想的直线，而是一条任意曲率的空间螺旋线，因此井下管柱和井壁的接触问题是一种随机接触的非线性力学问题，用一般的材料力学和结构力学方法是不能解决这类问题的。

The recompression phenomena have been found in the particle velocity histories of alumina specimens while the impact pressure between 7GPa-8GPa. From the point of view of phenomena, the recompression signals in terms of free surface particle velocity occurring in alumina ceramics under shock-loaded were similar to those in glass where failure wave has been widely verified.(4)The modified form for the Hugoniot Elastic Limit was given associated with

得到了A95陶瓷采用Drucker-Prager准则修正公式计算的σHEL值，并与实验得到的σHEL值进行了比较；(5)采用ANSYS/LS-DYNA有限元分析软件对冲击压缩下氧化铝陶瓷动态力学性能进行了模拟分析，数值模拟结果与实验结果吻合较好，数值模拟结果表明JH-2材料模型能够较好地模拟陶瓷的物理力学性能。

The recursion formula for calculating WOB are established by means of the mechanical analysis.

通过力学分析，推导出计算钻压的迭代公式，即建立了计算井底钻压的力学模型。

Based on the theoretical model of the optical and near-infrared wavelength refractivity which is recommended by the International Union of Geodesy and Geophysics's resolution in 1999, as well as, theory of Mendes(2004), we rededuce some theoretical formulae and give the practical expressions of hydrostatic and non-hydrostatic components of the refractivity.

本文基于国际大地测量与地球物理联合会1999决议推荐的光学和近红外波段的大气折射率差理论模型，在Mendes（2004）理论的基础上，对某些理论公式进行了重新推导，给出了大气折射率差静力学和非静力学分量的实用表达式。

The refractoriness,room temperature strength and expansion coefficient of vitrified bonds with different Na2O content were investigated.

研究了陶瓷结合剂中Na2O的含量对陶瓷结合剂性能的影响。发现结合剂的耐火度随Na2O含量的增加而降低；结合剂中Na2O含量对由结合剂和金刚石磨料制得的力学试条的强度有很大影响，结合剂Na2O含量较低时，随Na2O含量的增加，力学试样抗弯强度提高。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。