弹性动力学

基本解释 (translations)

elastodynamics

与弹性动力学相关的网络例句 [注：此内容来源于网络，仅供参考]

The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.

课题组对变几何桁架机构进行了深入的研究，全面地完成了研究计划，取得了预期的成果；提出了三种新的十面体组合机构以及由一个八面体和三个四面体组成的新型变几何桁架机构的结构形式；应用结式消元、附加传感器和同伦方法等提出了十面体、十二面体、三重八面体、组合十面体和新型变几何桁架机构的位置分析方法；建立了变几何桁架机构运动分析的一般方法；建立了简洁的凯恩和拉格伦日动力学的模型；应用有限元和子结构方法，提出了变几何柞架机构弹性动力学模型，导出了逆动力学方程的显式形式；设计和研制了一台可折叠的八面体变几何杵架机构装置等。

Based on the theory of elastic dynamics, the scattering of elastic waves and the dynamic stress concentration in a fiber-reinforced composite are studied.

基于弹性动力学理论，对纤维增强复合材料结构中弹性波散射及动应力集中问题进行了分析研究。

Considering component elastic distortion, the mechanistic elastodynamics model was established by alternative principle of quality and elastic cell, and the example mechanism dynamic response was obtained on the elastodynamics model.

4考虑机构高速运行时构件的弹性形变，利用质量和弹性元件替代原则建立了机构弹性动力学模型，求解了实例机构的动态响应。

Following the order of specialty to generality,thetransient elastodynamics,the transient heat conduction,three-dimensional coupledthermoelasticity and coupled thermoelastoplasticity and their application on fracturemechanics are studied one by one.

遵循从特殊到一般的次序，对瞬态弹性动力学、瞬态热传导、三维耦合热弹性力学和三维耦合热弹塑性力学及其在断裂力学中的应用逐一地进行了深入的研究。

When the meshless manifold method is utilized to analyze the elastodynamics, the method is divided into the major two parts: the discrete space of the domain is used to the partition of unity, which the present method void to mesh element and refine element.

在求解弹性动力学问题时，弹性动力学积分弱形式的推导采用加权残数法，空间离散采用基于单位分解法的无网格流形方法，时间离散主要采用Newmark法。

Using LaGrange theorem on base of analyzing the elastic prop model tension system of band saw machine, the dynamics model of elastic prop tension system of band saw machine has been established and converted to mathematics model applying the modern control theory.

本文以MJ317型木工杠杆压砣张紧系统的带锯机改造成弹性挺杆张紧系统的带锯机为研究对象，通过对带锯机弹性挺杆式张紧系统的弹性动力学分析，运用拉格朗日定理建立了张紧系统的动力学模型，并应用现代控制理论将模型转换成数学模型。

The propagation matrix method used widely in stratified media is extended to laterally inho-mogeneous media,and a numerical method known as generalized propagation matrix method for simulating elastic seismic wave propagation in inhomogeneous media is presented by using mixed variable elastic wave equation and matrix exponent solution of system of linear ordinary differential equations.

应用混合变量弹性动力学方程和线性常微分方程组的矩阵指数解法，将层状介质中广泛应用的弹性波传播矩阵解法推广至横向非均匀介质，给出了一种可计算复杂地质体中弹性波传播的广义传播矩阵数值解法。

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。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

For the first patern, elastic dynamics is adopted to study the steady state rolling contact, elastic dynamics incorporating with rigid dynamics is adopted to study the non-steady state. For the steady state, the analytical solution is obtained, and for the non-steady state, the variational formulation to solve the problem numerically is derived For the later patern, the function type friction coefficient is introduced. On the basis of the quasi-stastic theories of constant friction coefficients, both the exact theory and the simplified theory of the function type friction coefficient are established, the computer programms for both the theories are also made out. Using the function type friction coefficient, Shen-Hedrick-Elkins theory's application range is extended to large creepage .

对于速度对接触体力学特性的影响，本文采用弹性动力学方法和弹性动力学与刚体动力学相结合的方法分别对稳态和非稳态两种情况进行了研究，得到了稳态情况的解析解，给出了对非稳态情况进行数值求解的变分公式；对于速度对相关物理量的影响，本文主要讨论了速度对摩擦系数的影响，在滚动接触准静态理论的基础上引进了函数型摩擦系数，建立了函数型摩擦系数的滚动接触准静态精确理论和简化理论，并分别编制了相关的计算程序，还用函数型摩擦系数将简便的Shen-Hedrick-Elkins理论的适用范围扩展到大蠕滑区。

与弹性动力学相关的网络解释 [注：此内容来源于网络，仅供参考]

elastomer adduct：弹性体加成物

elastokinetics 弹性动力学 | elastomer adduct 弹性体加成物 | elastomer alloy 弹性体合金

dynamic：动力学

(2) 指明测量力矩的方法"分离法"(BREAKAWAY)或"动力学"(DYNAMIC),基于习惯的测量力矩的方法;(3) 带有"下行"(DOWN)、"运行"(RUN)和"上行"(UP)这样次序的清晰的永久性标记,仅仅在"运行"位置(弹性复位的)上可取出钥匙.

dynamic elastic modulus：动力弹性模量

dynamic design 动态设计 | dynamic elastic modulus 动力弹性模量 | dynamic elasticity 弹性动力学

elastodynamics：弹性动力学

elasto viscous solid 弹粘性固体 | elastodynamics 弹性动力学 | elastohydrodynamics 弹性铃动力学

elastodynamics：弹性体动力学

elastin 弹力素 | elastodynamics 弹性体动力学 | elastodynamicselastokinetics 弹性动力学

elastodynamics：弹性动力学 弹性体动力学

elastodurometer 弹性硬度计 | elastodynamics 弹性动力学 弹性体动力学 | elastodynamicstress-intensityfactor 弹性动力应力强度因数

hemodynamics：血流动力学

血流动力学(hemodynamics)是指血液在心血管系统中流动的力学,主要研究血流量、血流阻力、血压以及它们之间的相互关系. 血液是一种流体,因此血流动力学基本原理与一般流体力学的原理相同. 但由于血管系统是比较复杂的弹性管道系统,

dynamic photoelasticity：动态光弹性法

dynamic parallax 动力学视差 | dynamic photoelasticity 动态光弹性法 | dynamic precision 动态精度

poisson：帕松

而弹性动力学之发展,早在一八二八年柯西(Cauchy)及帕松(Poisson)便已导出在弹性介质中振动时基本的微分方程. 帕松并指出在弹性介质中可以有两种截然不同的波型存在(即是后来在地震学上的P及S波详见后文). 嗣后司托克士(Stokes),

magnetodynamics：磁动力学

magnetocaloric effect 磁热效应 | magnetodynamics 磁动力学 | magnetoelastic anisotropy 磁弹性蛤异性