共查询到17条相似文献,搜索用时 312 毫秒
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塑性力学流动理论的相似非耦联变分原理 总被引:1,自引:1,他引:0
引入了流动理论的相似非耦联方程的概念,建立了流动理论的相似非耦联差动原理,基于该差动原理,建立了塑性力学流动理论的相似非耦联势能原理和余能原理及修正相似非耦联能和余能原理,这些变分原理是在相似非耦联的模型体和原型体之间实现学场量转换的理论依据,也是金属成形过程和光塑性力学模拟研究的理论基础。 相似文献
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文献^[1]中给出了聚合公理系统COG的布尔值模型A^B本文在^[1]的基础上讨论了A^B中的混合与混合原理。 相似文献
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Fu Baolian 《燕山大学学报》1997,(2)
引入了相似非耦联方程的概念,应用加权余量法建立了塑性力学变形理论的相似非耦联势能原理和余能原理.应用拉氏乘子法于该势能原理和余能原理,建立了广义相似非耦联势能原理和余能原理.并应用该余能原理于相似非耦联的三角形桁架的计算. 相似文献
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通过对文献[1](武政大学. 电子线路实验. 高等出版社,1993)和文献[2](郑家祥. 电子测量实验. 国防工业出版社,1985)中的示波器的扫描与同步实验的研究,论述了一种电路简单且原理简捷的实验电路,很好地解决了文献[1]和文献[2]在此实验中的不足。丰富了实验内容,增强了实验效果 相似文献
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文献[2]对Flow—shop系统给出了使瓶颈机床利用率为1的最少托盘数量的分布,该文通过引入文献[3],针对串行生产线提出的弱稳定概念,采用托盘在机床间传递工件的方案,进一步证明了文献[2]给出的最小托盘数分布在使系统稳定运行的意义上也是最佳的 相似文献
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《中国工程科学》2012,(4):2-6,11
The non-coupled charge explosion and geo-mechanical dynamics problem in real air condition is studied in this paper. It analyzes and calculates the problem by using the real air state equations. Through researching on the non-coupled charge rock bench blasting with big clearance of air, its result indicates that the borehole wall reflection overpressure is far higher than strength of rock, but much lower than detonation front pressure of the charge. So non-coupled charge explosion blasting engineering is very successful. Furthermore, it introduces the method of shaft forming by blasting once and the new tube room technology. And the non-coupled charge explosion is used successfully in the method of shaft forming by blasting once. As it drills and blasts in the top and removes the broken rock from the bottom tunnel, it increases the construction efficiency significantly. This paper has important reference on the improvement of the large-span underground engineering construction. 相似文献
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关于物理模拟回弹变分原理 总被引:5,自引:1,他引:4
本文作者曾在一些文章中引入了非耦联系统的概念并建立了物理模拟变分原理。根据这些概念和原理,本文给出了回弹反耦联系统和方程并建立了回弹势能原理、余能原理,物理模拟广义回弹势能原理和广义回弹余能原理。同时,应用物理模拟回弹势能原理于弹生厚壁筒的回弹计算。 相似文献
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陈立群 《鞍山科技大学学报》1993,(1)
利用附加惯性力的方法建立了非惯性系中变质量力学系统的Gauss变分原理,由此得到了非惯性系中变质量非完整系统运动方程的各种形式,最后提出了广义惯性力的广义非惯性势的概念并进一步给出上述方程的简化形式。 相似文献
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Advances in simulated modeling of vibration systems based on computational intelligence 总被引:1,自引:0,他引:1
LIANG Yanchun LEE Heow Pueh LIN Wuzhong LIM Siak Piang LEE Kwok Hong ZHOU Chunguang 《自然科学进展(英文版)》2002,12(12):881-886
Computational intelligence is the computational simulation of the bio-intelligence, which includes artificial neural networks, fuzzy systems and evolutionary computations. This article summarizes the state of the art in the field of simulated modeling of vibration systems using methods of computational intelligence, based on some relevant subjects and the authors' own research work. First, contributions to the applications of computational intelligence to the identification of nonlinear characteristics of packaging are reviewed. Subsequently, applications of the newly developed training algorithms for feedforward neural networks to the identification of restoring forces in multi-degree-of-freedom nonlinear systems are discussed. Finally, the neural-network-based method of model reduction for the dynamic simulation of microelectromechanical systems (MEMS) using generalized Hebbian algorithm (GHA) and robust GHA is outlined. The prospects of the simulated modeling of vibration systems using techniques of computational intelligence are also indicated. 相似文献
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本文既给出了一种一般的啮合轮齿热弹性变形分析数值方法,又给出了啮合轮齿耦合热弹变形分析数值方法,对机床齿轮及轧机齿轮的分析实例表明这种方法是有效而可靠的。 相似文献