查询词典 virtual displacement

The definitions of intrinsical linear nonholonomic constrain and intrinsical nonlinear nonholonomic constrain are put forward in this paper. The nonholonomic systems are divided into intrinsical linear nonholonomic system and intrinsical nonlinear nonholonomic system.The rational spectrums of all kinds of virtual displacement definitions and commutativity of d,?

本文研究了非完整动力学中使不定性问题确定化的交换关系和将非线性问题线性化的虚位移定义，首次证明并给出了在非完系统中各种虚位移定义与交换关系的合理适用范围，指出完整动力学与本质线性非完整动力学在研究方法上具有相同性。

Firstly,driving forces equations of each driving pair of the whole mechanism are established by combining D'Alembert Principle with virtual displacement Principle.

然后利用虚设机构法建立机构中各杆件的速度、加速度的一、二阶影响系数矩阵，从而解决了少自由度关联机构惯性力求解中各杆件的速度和加速度难以求解的问题。

Besides this, the calculation of magnetic energy and electromagnetic torque of SCLRM is deduced by virtual displacement principle, and the physical essence of the electromagnetic torque is also analyzed in detail.

利用虚位移原理推导出了SCLRM中的磁场能量和电磁转矩的计算方法，并详细分析了电磁转矩产生的物理本质。

The element stiffness matrix of this variable section beam is derived based on principle of virtual displacement.

对圆锥形变截面梁单元进行了分析，采用有理函数的位移模式，利用虚位移原理，推导出该变截面梁单元的刚度矩阵

The following works have been fulfilled within this thesis: First of all, based on the general principle of virtual displacement of nonlinear continuum mechanics, the geometric and material stiffness matrices is presented, several examples show that both of them can give out accurate result.

其次，通过对交错桁架结构的一些算例对比，得到了该结构一些带规律性的结论，这是国内首次对交错桁架体系进行空间三维的弹塑性全过程分析。

Based on the variational principle of virtual voltage and virtual displacement derived in this thesis and the classical theory of linear laminated plates, and by using the constitutive equations of elastic piezoelectric materials, and the DKQ quadrilateral plate bending element, the finite element modeling for the fabric reinforced laminated plates with nonlinear voltage-electric strain relationship of piezoelectric actuators has been established for the first time in this thesis. And the expressions for the electric loadings with obvious mechanical meaning and convenient for computation are established, which can be used to the deformation analysis of laminated plates with piezoelectric actuators under specified voltages.

以本文直接导出的压电结构的虚电势—虚位移变分原理为基础，依据经典线性层合板理论和压电弹性体的本构方程，采用基于离散法线假设的DKQ四结点任意四边形薄板弯曲单元，首次建立了考虑非线性电压—电应变关系的含压电致动器的纤维增强型层合板的有限元分析模型，并推导建立了力学意义明确、便于计算的电荷载表达式，可用于指定电压条件下纤维增强型叠层合成板的变形分析。

The principle of the minimum potential energy Because the virtual displacement is very small, the value and the direction of the external forces can be regarded as invariable during the virtual displacement, and only its acting points are changed.

三 极小势能原理由于虚位移是微小的，因此在虚位移的过程中，外力的大小和方向可以当做保持不便，只是作用点有了改变。

The relation between deformation and displacement,the equilibrium equation and the princi pie of virtual displacement for straight bar s in plane banding is derived.

本文推导出直杆平面弯曲时的变形与位移关系式、平衡方程和虚位移原理。

Virtual speed* virtual time = virtual displacement (exists in virtual space-time).

虚速度＊虚时间＝虚位移。

In the sense of Von Karman large displacement, the governing equation of nonlinear dynamic response of the clamped circular plates under impact of a mass is established by using the virtual displacement principle and Galerkin's method in this paper. The effect of coupling between the impact load and the displacement of. the circular plates is considered. The governing equation is solved by applying the time increment method and the singular perturbation theory, and the asymptotic solutions of nonlinear dyna...

本文在Von Kármán大位移的意义上，利用虚位移原理伽辽金方法建立了圆板在物体撞击下的非线性动力响应的控制微分方程，在研究响应问题时，考虑了冲击载荷与圆板位移响应之间的耦合影响，文中使用时间增量法和奇异摄动理论求解问题的控制方程，获得了固支圆板非线性动力响应的近似解，并且求解了具体算例，绘出了圆板位移、应力响应曲线以及冲击力随时间的变化曲线。

But in the course of internationalization, they meet with misunderstanding and puzzlement.

许多企业已经意识到了这一点，但在国际化的进程中，仍存在一些误区与困惑。

Inorder toaccomplish this goal as quickly as possible, we'll beteamingup with anexperienced group of modelers, skinners, and animatorswhosenames willbe announced in the coming weeks.

为了尽快实现这个目标，我们在未来数周内将公布与一些有经验的模型、皮肤、动画制作小组合作。