1) energy-variational principle
能量变分
1.
Based on energy-variational principle,a fast numerical calculational methods is proposed to study the accurate and fast model of on-ling control on plate or strip mill.
为解决板带轧制高速高精度在线模型问题,文章基于能量变分原理,研究了一种快速数值算法。
2) energy-variational method
能量变分法
1.
Based on energy-variational method,the interface slippage of composite beams and the variation of the effective width are analyzed.
利用能量变分法,分析组合梁在界面产生相对滑移后,其组合梁翼缘板有效宽度的变化规律。
3) energy variational method
能量变分法
1.
By using the energy variational method,the variation of displacement and the stress and shear lag effect on the top and bottom plates of the box .
不同于以往荷载作用于箱梁的肋板处时剪力滞效应的研究,考虑当荷载不作用在箱梁的肋板处时顶板与底板位移及剪力滞效应的差异,对顶板与底板分设不同的纵向位移差函数,采用二次抛物线作为箱梁翼缘板的纵向位移沿梁宽分布函数,通过能量变分法,研究荷载在顶板横向变位下箱梁顶板与底板的位移,应力及剪力滞效应的变化,根据对于简支箱梁受均布荷载作用下跨中剪力滞效应的计算结果,随着作用在顶板的对称荷载从对称中心向肋板处移动,顶板将经历一个产生负剪力滞效应到无剪力滞效应,再到产生正剪力滞效应的过程。
2.
With the new concept of upset stiff cable structure,frequency of this type of steel truss arch structures is determined by energy variational method.
采用有限元分析软件AN SY S对一种钢桁架拱结构进行固有振动分析,同时将钢桁架拱看作倒置的劲性索结构,采用劲性索结构的分析理论——能量变分法分析这类结构的频率,并将得到的结果进行了比较。
3.
Based upon the energy variational method and Rayleigh method,the simplified formulas for calculating natural frequency and vibration modes are presented.
将双曲抛物面索网中的稳定索与承重索均用劲性索代替形成劲性索网结构,基于能量变分法和R ay le igh法提出了劲性索网结构的自振频率和振型的简化计算公式,用有限元法验证了本文方法求解劲性索网结构基频的精确性。
4) energy-differential method
能量变分法
1.
The shear lag coefficient is deduced by the energy-differential method.
剪力滞后现象是高层框筒结构的一个重要力学现象,本文采用能量变分法分析了薄壁箱形截面梁的剪力滞后效应,对影响剪力滞系数的几何参数进行了对比分析,得到了一些有用的结论,对结构设计与施工有一定的指导作用。
2.
In this paper , the calculation formula and boundary conditions of shear lag effect of the cantilever box girder with varying depth are deduced by the energy-differential method and the difference method.
运用能量变分法和差分法推导出变截面悬臂箱梁剪力滞效应计算公式和边界条件。
3.
Differential equations and boundary conditions(BC)are deduced according to energy-differential method about constant depth box girders.
首先利用能量变分法推导出等截面箱梁剪力滞效应微分方程及边界条件 ,对于变截面而言 ,该微分方程和边界条件的系数均是坐标的函数。
5) energy variation method
能量变分法
1.
By energy variation method,the paper presents the design table of equivalent load for four-sides-fixed rectangle plates under local loads.
运用能量变分法,给出了局部荷载作用下四边固支矩形板的跨中弯矩和挠度的计算用表,以及不同相等原则下的等效均布荷载因数。
2.
Natural vibration of stiff cable structures is analyzed based on FEM and the energy variation method,and the same is done to truss arch structures based on the new concept of upset stiff cable, from which the similarities of the two types of structures are obtained.
采用有限元法对劲性索结构及由其倒置而成的桁架拱结构进行了固有振动分析,并与采用能量变分法对这2类结构固有振动分析得到的结果进行了比较,得到劲性索及桁架结构的固有振动具有相似性。
3.
A case study of one continue beam bridge with T main girder constructed by cast-in-site and span-by-span method was made by energy variation method in this paper to analyze the influence on the effective distribution width of the main grider.
以T形截面连续梁为例,采用能量变分法,针对桥梁的整体现浇和逐孔施工方法,研究分析主梁有效宽度,说明桥梁施工方法将影响主梁有效宽度的分布。
6) energy variation principle
能量变分原理
1.
Based on energy variation principle,the governing differential equations and the corresponding boundary conditions of box girder with consideration for the shear lag effect and shear deformation as well as rotational inertia were induced.
以能量变分原理为基础,综合考虑剪力滞后效应、剪切变形和转动惯量的影响,推导出箱形截面梁的控制微分方程和相应的自然边界条件,据此获得几种常用边界条件(简支、悬臂、连续、两端固支)的固有频率方程,提出一种能对工程中常用矩形薄壁箱梁自振特性进行分析的方法。
参考词条
补充资料：量变
| 量变 quantitutive change 事物在数量上的增减和场所的更换。又称渐变。是事物运动的基本状态之一，与质变相对。事物的量变由事物内部矛盾所引起，表现为微小的，不显著的、逐渐的和缓慢的发展变化，呈现出事物的统一、静止、平衡、相持等状态。量变时，事物的质保持暂时的稳定。量变积聚着破坏这种稳定状态的因素，达到一定关节点，就会引起事物的质变。量变体现着事物存在和发展的连续性，又是事物质变的准备阶段。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。