共查询到18条相似文献,搜索用时 78 毫秒
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基于偶极近似 ,运用电极化方法 ,定量研究了电流变液中悬浮颗粒在外电场作用下其体积和形状的变化 ,并计算了其体积和形状的相对变化率 .研究结果表明 :悬浮颗粒的体积和形状的相对变化率均与电场强度的平方成正比 ,并与ER本身的性质有关 .一般情况下 ,颗粒的体积和形状的相对变化率分别为 8.4 %和 12 .5 % ,对总体积变化率的贡献为 1.6 8% .这种变化对于ER系统的电涨和电热都作出了贡献 ,仅当将颗粒当作刚性球时 ,其自由能才与电场强度的平方成正比 . 相似文献
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电流变液透光性的可调节特征 总被引:4,自引:0,他引:4
利用He-Ne激光测量SiO2和硅油组成的电流变液的透光性,平行于激光束施加电场时,适当浓度的电流变液显示出透光性随电场可调节的特征。垂直于激光束施加电场时,透射光强度迅速下降随后缓慢恢复,但对于高浓度(2%)试样没有观察到透射光强度最初的快速下降阶段。 相似文献
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电流变液的研究进展及应用前景 总被引:3,自引:0,他引:3
电场致流变液体(电流变液)是一些高介电小颗粒和低介电油液的混合体,它在高电场作用下呈现液体与固体间的变换,变换时间为几毫秒,而且变换可逆。阐明了电流变液的原理,综述了电流变液在机制、材料及应用等方面的研究现状,并介绍了电流变液在技术和工业上广泛的应用前景。 相似文献
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The ground state properties of Hs nuclei studied in the framework of the relativistic mean field theory revealed that more stable isotopes are located on the proton abundant side of the chain.The last stable nucleus to the proton drip line is ~(256)Hs.The most stable unknown Hs nucleus may be ~(268)Hs.The density dependent delta interaction pairing is used to improve the BCS pairing correction,which results in more reasonable single-particle energy level distributions and nucleon occupation,and it is shown to be available to describe the properties of nuclei in the superheavy region. 相似文献
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考虑电流变液颗粒质量的影响及多粒子近程相互作用,利用等效平板电导模型,由分子动力学方法模拟了泊肃叶流动状态下电流变液结构的演化过程特征;设计制作了实验装置,观测了泊肃叶流动行为,并与模拟结果进行比较.研究表明:在外电场作用下,计及颗粒质量效应后,电流变液结构演化中跃迁区速度变化的峰值减小,进入柱塞区状态的时间延长,柱塞区的宽度加大,且颗粒质量越大,效应越显著.实验观测的泊肃叶流动行为与模拟结果基本相符,且观察到极板壁上的颗粒静止不动,证明了“极板壁上颗粒静止不动”这一假设的正确性
关键词:
电流变液
泊肃叶流动
等效平板电导模型
结构演化 相似文献
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ZHOU Shi-Qi 《理论物理通讯》2006,46(8)
A bridge function approximation is proposed for a single-component fluid consisting of penetrable sphere interacting via a potential that remains finite and constant for center-center distance smaller than the particle diameter and is zero otherwise. The radial distribution function from the Ornstein-Zernike integral equation combined with the present bridge function approximation is in satisfactory agreement with the corresponding simulation data for all of the investigated state points. The presently calculated excess Helmholtz free energy respectively based on virial route and compressibility route is highly self-consistent, and is in very good agreement with simulational results for the case of low temperatures. The present bridge function approximation, combined with the bridge density functional approximation,can reproduce very accurately density profiles of the penetrable sphere fluid confined in a hard spherical cavity for all the cases where simulational results are available. 相似文献
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基态UC2分子的结构和势能函数 总被引:5,自引:0,他引:5
采用密度泛函理论 (DFT)的B3LYP方法和相对论有效原子实势理论模型 (RECP) ,对UC2 分子可能的结构进行优化计算 ,得到UC2 分子稳定构型为角形C -U -C(C2v) ;由微观可逆性原理 ,判断了UC2 分子的离解极限 ;并且导出了基态UC2 分子 (X 5B1)的多体项展式势能函数 ,其势能面等值图展现了C -U -C(C2v)稳定结构 ;根据势能面等值图 ,讨论了C +UC(X 3 П)反应和U +C2 (X 1∑+ g)反应的势能面静态特征 相似文献
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ZHOU Shi-Qi 《理论物理通讯》2006,46(2):323-331
A bridge function approximation is proposed for a single-component fluid consisting of penetrable sphere interacting via a potential that remains finite and constant for center-center distance smaller than the particle diameter and is zero otherwise. The radial distribution function from the Ornstein-Zernike integral equation combined with the present bridge function approximation is in satisfactory agreement with the corresponding simulation data for all of the investigated state points. The presently calculated excess Helmholtz free energy respectively based on virial route and compressibility route is highly self-consistent, and is in very good agreement with simulational results for the case of low temperatures. The present bridge function approximation, combined with the bridge density functional approximation, can reproduce very accurately density profiles of the penetrable sphere fluid confined in a hard spherical cavity for all the cases where simulational results are available. 相似文献
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The absorption and photoluminescence spectra of a number of derivatives of 3,3,6,6-tetramethyl-N-phenyl-decahydroacridine-1,8-dione
with a regular change in the structure of molecules are investigated. Their electronic structure is calculated. The nature
of some of the spectral bands is established. Significant differences in the efficiency of the processes of photochemical
transformations of dyes exposed to UV irradiation have been revealed; these changes are attributable to the different donor-acceptor
properties of the substituents introduced. A mechanism of phototransformations that agrees with both calculations of the electronic
structure of molecules and the spectral-luminescent characteristics of the initial and irradiated compounds is suggested.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 4, pp. 454–459, July–August, 2005. 相似文献