弹性

The first, A finite element method to compute the natural frequency of sandwich plates is found.

首先对粘弹性复合夹层结构的固有频率和动力响应进行研究，给出了一种计算粘弹性阻尼夹层板结构动力响应的方法，并编制程序进行求解。

As a special case, when the index isα=0 or α=1, the equations is just the classical elastic mechanics or the Newtonian viscous mechanics, respectively.

作为特例，当粘弹性指标分别为α=0和α=1时，以上方程组即为经典的弹性力学和牛顿流体力学基本方程。

Considering that body forces and surface forces were both non-conservative force, the quasi-Hamilton principle and the quasi-complementary Hamilton principle of non-conservative elasto-dynamics systems were established.

按照广义力和广义位移之间的对应关系，将弹性动力学的基本方程乘上相应的虚量，然后积分，代数相加，并考虑到体积力和面积力均为非保守力，建立了非保守弹性动力学系统的拟Hamilton原理和拟余Hamilton原理。

Considering the influence of inner ornament of vehicle, the internal scattered sound field of multilayer elastic/nonelastic cavity is studied theoretically in the paper.

考虑到汽车内饰的影响，本文从理论上研究了双层弹性/非弹性壳体的内部散射声场。

Second order nonelastic analysis method of multistorey and high-rise lightweight spatial steel frame is emphatically researched and calculating theory and design method ground on structural ultimate bearing capacity is established.

推导了半刚性连接轻型钢框架结构空间二阶非弹性分析新的切线刚度矩阵，建立半刚性连接轻型钢框架结构空间二阶非弹性分析和结构极限承载力设计新的计算方法。

Therefore, the covering-domain method can be adopted to calculate the radiated sound field from the complex-shaped multilayer elastic/nonelastic closed cavity.

从而可应用覆盖域的思想和方法计算复杂形状双层弹性/粘弹性封闭腔体或内层填有吸声材料的双层封闭腔体在外力作用下的辐射声场。

The interactions between two semifolded solitons are elastic,while the interactions among other nonlinear multivalued and single valued excitation patterns such as the interactions between semifolded soliton and single valued localized soliton,semifolded soliton and folded soliton,and the interaction among semifolded soltion,folded soliton and single valued localized solitons,are nonelastic generally,which reveal different exotic and important nonlinear mechanical properties.

半折叠孤子之间的非线性相互作用是弹性，而半折叠孤子与单值局域孤子、半折叠孤子与折叠孤子以及更复杂的半折叠孤子、折叠孤子、单值局域相干孤子之间等多值和单值非线性激发模式间的相互作用是非弹性的，呈现出多样的非线性特性。

Selecting proper single valued variable separation functions in the 2+1 variable separation solutions,we construct many types of single valued coherent soliton structures such as dromion,dromion lattice,solitoff,2-solitoff,static and kinetic breather,instanton,compacton, peakon,and so on.The interactions among these coherent localized excitations including the collisions of compaction and compacton,peakon and peakon,line soliton and y-periodic soliton,dromion and dromion,dromion and solitoff,et al,are investigated analytically and graphically,and found that can be elastic and nonelastic respectively,which reveal various exotic and important nonlinear characters and interaction properties.

在2+1维分离变量解中选择适当的的单值分离变量函数，构造了2+1维非线性波动模型多种单值相干孤子结构如Dromion，Dromion格子，Solitoff，2-Solitoff，静止和运动呼吸子、瞬子、Compacton、Peakon等；考察了一些典型的非线性激发模式间如Compacton和Compacton，Peakon和Peakon，线孤子和y-周期孤子，Dromion和Dromion，Dromion和Solitoff之间等相互作用行为，发现其相互作用可以弹性的也可以是非弹性的，揭示了多样奇异而重要的非线性特性。

Finally, we present an arithmetic of multiplehypocentral, heterogenous dislocation, and a multirupture segment superposition model for simulating the earthquake deformation field. The simulated LOS interferometry map presents the distribution characteristics of the earthquake deformation field better than that of previous studied. Meanwhile, a suit of fault geometric parameters of the earthquake is also obtained by the study. Having a better effect upon simulating asymmetry, great dislocation, macro rupture field, and nonhomogeneity of dislocation than the traditional model, the multisegment method is a progress of this work. It provides a better explanation for the study on hypocentral parameters.

基于上述原因，本文对Okada线弹性位错模型的算法进行了改进，提出了"多震源、非均一位错分量、多破裂段叠加"的线弹性模型，该模型模拟出的形变场干涉纹图较好地体现了地震形变场的分布特征，并由此获得了一套较为完整的地震发震断层的几何学特征参数，为破裂带长度、破裂面方向、破裂面大小等震源破裂特征参数研究提供了较好的解释。

The nonlinear magnetoelastic kinetic equations, the electrodynamics equations and the expressions of Lorentz force of thin current-carrying plate under the action of the coupled field are given. The normal Cauchy form nonlinear differential equations, which include ten basic unknown functions in all, are obtained by means of variable replacement.

该文在给出载流薄板在耦合场作用下的磁弹性非线性运动方程、电动力学方程和洛仑兹力表达式的基础上，通过变量代换将描述载流薄板的磁弹性状态方程整理成含有10个基本未知函数的标准柯西型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。