1) constrained Birkhoffian mechanics
约束Birkhoff方程
2) Constrained Birkhoffian system
约束Birkhoff系统
1.
The form invariance of constrained Birkhoffian system is a kind of invariance of the constrained Birkhoffian equations under infinitesimal transformations.
约束Birkhoff系统的形式不变性是约束Birkhoff方程在无限小变换下的一种不变性· 给出约束Birkhoff系统形式不变性的定义与判据 ,并研究了这种形式不变性与Noether对称性之间的关
3) Birkhoff equation
Birkhoff方程
1.
Defining Pfaff action of relativistic system, the Pfa ff _Birkhoff principle and the Birkhoff equation for relativistic systems are astab lished.
定义相对论性Pfaff作用量 ,给出相对论性Pfaff_Birkhoff原理和相对论性Birkhoff方程 ,研究相对论性Birkhoff方程的几何描述 ,给出相对论性Birkhoff方程的恰当特性以及相对论性Birkhoff方程在R×T M上的形式 。
4) constraint equation
约束方程
1.
Based on the theory of coupling and constraint equation, the paper puts forward a Finite Element model (FEM) of metallic hose with the element of Shell93 and Beam189.
运用非线性有限元法,采用三维壳单元Shell93和空间梁单元Beam189,利用耦合和约束方程理论,在ANSYS中建立了金属软管的有限元模型,对金属软管的力学特性进行了分析计算,并将计算结果与实验数据相对照,确定了有限元方法的可靠性,对计算结果进行分析,得出了对金属软管的设计和应用具有参考价值的结论。
2.
Then,the displacement relation between the nodes in one beam is made up by the constraint equation method.
在对横梁的力学特性分析基础上,总结了刚性材料法的不足;提出的约束方程法,可以简单有效建立起刚性横梁节点之间的相互位移关系,并应用通用有限元程序ANSYS给出了算例,证明该方法具有实际应用价值,尤其适合于斜拉桥和悬索桥的空间有限元模拟。
3.
The constraint equations were established at the common boundary section based on plane section premise.
针对薄壁结构提出了一种混合有限元方法,对结构关心的部位采用板壳单元模拟,其他部位采用杆系单元模拟,根据平截面假定推导了2种单元在交界面处的约束方程,由此建立整体混合有限元模型。
5) constraint equations
约束方程
1.
The rationality of end constraint equations on buckling loads of a drillstring in an inclined wellbore is investigated.
针对斜直井内钻柱在自重和上部压力共同作用下的屈曲分析,用Ritz法研究了端部约束方程的合理性。
2.
In the new approach, the method of regula falsi is used to solve the constraint equations, instead of the conventional linear approximation.
在这种新方法中使用了ragulafalsi方法来处理约束方程 ,代替了常用的线性近似法 。
6) equations of constraint
约束方程
1.
The motion of the rolling disk was analysed to try to explain some unintegrable equations of constraint which is not definitely independent equation of nonholonomic constraint,and the concept of concealed coordinate was proposed.
通过对滚盘的运动分析 ,说明某些不可积的约束方程并不一定是独立的非完整约束 ,并给出隐形坐标的概
2.
The equations of constraint are concerted with ideal constraints.
约束方程和理想约束协调一致 。
3.
This article analyses the motion of the rolling disk,trying to explain some unintegrable equations of constraint which is not definitely independent equation of nonholonomic constraint,and put forward the concept of concealed coordinate.
通过对滚盘的运动分析说明某些不可积的约束方程并不一定是独立的非完整约束。
补充资料：约束方程
见约束。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条