弹性

Besides in beam sea the amplitude of heave motion is quite large, the amplitudes of rigid body motions of the floating structure are all small. However, the amplitude of flexible deformation is equivalent to or even larger than that of the rigid body motion.

除横浪时升沉运动的幅值较大外，浮体结构的刚体运动的幅值均较小，而结构的弹性变形位移幅值与刚体运动幅值相当，甚至超过了刚体运动，这就证明了对这种结构必须考虑弹性变形对流场的影响即必须采用水弹性理论进行计算。

Biot's consolidation theory was used to serve as a frame working with the nonlinear elastic model or with elasto-plastic model in the program. Nonlinear elastic model includes Duncan-Zhang model, Gong Xiannan Ko consolidation model and the model proposed in chapter 2. Elasto-plastic model in the program includes Mohr-Coulomb model, Drucker-Prager model and the bounding surface model developed in chapter 3. The program can be used in cases of plane problem and axisymmtric problem.

FOR，针对软土地基的变形特点，该程序以Biot固结理论为框架，可以进行线弹性，非线性弹性和弹塑性的有限元计算，在非线性弹性模型中包括了Duncan—Chang模型、龚晓南Ko固结模型和本文建立的非线性模型，弹塑性模型中包拓了Mohr—Coulomb模型，Drucker—Prager模型以及本文中建立的边界面模型，该程序可以考虑平面问题也可以考虑轴对称问题。

A yellowish, amorphous, elastic material obtained from the milky sap or latex of various tropical plants, especially the rubber tree, and vulcanized, pigmented, finished, and modified into products such as electric insulation, elastic bands and belts, tires, and containers.Also called caoutchouc , India rubber

橡胶：一种浅黄色的弹性非晶体物质，从各种热带植物尤其是橡胶树的乳液或胶乳中提取，然后加以硫化、着色、磨光、加工成如电绝缘材料、弹性带和弹性条、轮胎和容器等产品也作 caoutchouc ， India rubber

His research on mechanics deals with elastic mechanics, photo-elasticity, structural mechanics, visco-elastic mechanics, celestial mechanics, fluid mechanics, and dynamic stability.

他在应用力学方面的研究涉及到弹性力学、光弹性、结构力学、粘弹性力学、天体力学、流体力学、动力稳定性等方面。

We provide you with a variety of coupling: a patch-coupling, 2 drum gear coupling, three teeth coupling, 4-pin set of flexible couplings, 5-swelling connection kit, 6 Snake Spring couplings, coupling flanges 7, 8 radial button rigid couplings, coupling shell folder 9, 10-pin flexible couplings, 11-pin flexibility of the tooth - Axis, the Plum Blossom 12-coupling, 13 tire coupling, 14 Cross Coaxial universal joint, slider coupling 15, 16 roller chain coupling, and other non-standard coupling and inverse Only, Clutch, and other transmission equipment.

我们为您提供的联轴器品种有： 1 膜片联轴器、2 鼓形齿联轴器、3 齿式联轴器、4 弹性套柱销联轴器、5 胀紧联接套、 6 蛇形弹簧联轴器、7 凸缘联轴器、8 径向键刚性联轴器、9 夹壳联轴器、 10 弹性柱销联轴器、11 弹性柱销齿式联轴器、12 梅花型联轴器、13 轮胎式联轴器、 14 十字轴式万向联轴器、 15 滑块联轴器、16 滚子链联轴器等其它非标联轴器和逆止器、超越离合器等传动设备。

The classical Hertz and JKR elastic contact theory is successfully applied to the plastic collision of cohesive particles. And the coefficient of restitution is then defined from the consideration of energy.

在经典Hertz弹性接触理论和JKR粘弹性接触理论的基础上，本文从理论上将其推广应用至粘附性颗粒塑性碰撞的情形，并从能量的角度定义了能够更加合理反映碰撞规律的弹性回复系数。

A theoretical description of the deformed state of QCs requires a combined consideration of interrelated phonon and phason field. The phonon field describes the motion of lattices in physical space, while the phason field describes the quasiperiodic arrangement of atoms in the complementary orthogonal space, which interact with one another. Owing to the existence of phason field, the elasticity of QCs is more complex than that of the conventional crystals.

准晶弹性的刻画不仅需要描写晶格振动的声子场，还需要刻画原子准周期排列的相位子场，而且二者是相互耦合的，所以准晶的弹性较经典的一般晶体的弹性复杂的多。

In this paper,the practical expressions of relaxation modulus and creep compliance,which are necessary for the use of elasticity recovery correspondence principle in nonlinear viscoelastic constitutive theory,are proposed.

在前文中我们提出了非线性粘弹性本构理论中的弹性回复对应原理［1］，它为求解非线性粘弹性问题开辟了新途径。

By using Lee\'s matching law, the excess pore-air pressure, excess pore-water pressure and settlement in the Laplace-transformed domain are obtained for one-dimensional consolidation in unsaturated soils, under the large-area uniform instantaneous loading. A computer program using the method by Crump and Durbin is developed to obtain the semi-analytical solution of the excess pore-air pressure, excess pore-water pressure and settlement under the boundary conditions of the top surface permeable to water and air and the bottom impermeable to water and air.

8采用李氏比拟法，应用Merchant粘弹性模型，得到了Laplace变换域内粘弹性非饱和土地基一维固结时超孔隙水压力，超孔隙气压力以及土层沉降的解；采用Crump及Durbin方法实现Laplace逆变换，获得大面积均布瞬时加荷，在顶面排气排水，底面不排气不排水情况下粘弹性非饱和土地基一维固结时的半解析解。

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。