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1)  virtual unit
虚单元
1.
To process the pumping well as a series of virtual units could simulate the changes between the drawdown and the time in each point of the calculating region,research the law of water movement,solve the pumping of group wells at constant rate under the condition of the random boundary,forecast the phreatic surface,instruct the construction progress and appraise the rationality of the water l.
将抽水井当作一系列虚单元来处理,可以模拟单井抽水时计算区域各点水位降深随时间的变化,研究水流运动规律;求解任意边界条件下的群井定流量抽水问题;预测潜水位;指导施工开挖进度;评价降水方案的合理性。
2)  virtual element
虚拟单元
1.
Component mode synthesis method based on virtual elements
基于虚拟单元的模态综合法
2.
In this paper,the method of virtual element and generalized initial stress is presented for developing software on FEM analysis of geotechnical excavation.
结合岩土工程有限元分析软件开发的需要,提出单元开挖问题处理的虚拟单元广义初应力法,并基于该方法设计分步开挖问题数值分析算法,应用该方法编制的程序对一分步开挖问题进行了数值模拟分析,提出了虚拟单元广义初应力方法在岩土工程有限元分析软件设计及编程等方面的特点。
3)  cell,phantom
虚像单元
4)  virtual bar element
虚拟杆单元
1.
A 4-node reference surface plate/shell element combining with a virtual bar element is employed to numerically solve the nonlinear buckling equations using a revising arc-length iteration scheme.
基于Mindlin假定下的大变形板/壳理论,采用参考面单元和虚拟杆单元相结合的非线性有限元方法,建立了分析含多个穿透分层损伤层合板后屈曲行为的有限元计算模型,并给出了考虑接触后非线性屈曲方程的迭代算法,从而研究考虑层间接触效应的多分层层合板的后屈曲性态。
2.
The delaminated composite panel is simulated by a reference surface finite element combining with a virtual bar element to avoid the overlapping between two sublaminates at the delamination front.
基于Mindlin假定下大变形的板/壳理论,采用参考面单元和虚拟杆单元相结合的非线性有限元方法,建立了分层损伤层合板后屈曲分析的有限元计算模型,并研究了考虑层间接触效应的单分层层合板的后屈曲性态。
3.
A FE model of composite beam embedded with double through thickness delaminations is constructed using the technology of reference surface finite element and virtual bar element.
采用参考面单元技术并引入虚拟杆单元,建立了含多个分层层合梁屈曲分析的有限元模型,通过数值实验验证了模型的正确性。
5)  virtual unit address
虚单元地址
6)  virtual element method
虚拟单元法
1.
Based on the analysis of calculation examples of centripetal seepage problem and flat-bottomed dam foundation seepage,it is shown that the discharge calculation with virtual element method will get a high precision.
提出了计算渗流场流量的虚拟单元法,推导了虚拟单元法有限元方程,并探讨了虚拟单元法的有限元实现方法,建立了虚拟单元法求解渗流流量的理论和方法体系。
补充资料:九日逢虚中虚受
【诗文】:
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【注释】:



【出处】:
全唐诗:卷842-29
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