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多路阀耦合节流槽结构的拓扑变量空间优化 被引量:10
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作者 王安麟 况龙 张小路 《西安交通大学学报》 EI CAS CSCD 北大核心 2017年第6期103-109,共7页
针对多路换向阀换向过程中的多阀口节流耦合作用问题,提出了以圆型、U型以及半圆型3种基本节流拓扑结构的参数为设计变量的多路换向阀耦合节流槽结构设计方法。在确认多路换向阀台架实验结果与三维流场解析响应流量和压力特性基本一致... 针对多路换向阀换向过程中的多阀口节流耦合作用问题,提出了以圆型、U型以及半圆型3种基本节流拓扑结构的参数为设计变量的多路换向阀耦合节流槽结构设计方法。在确认多路换向阀台架实验结果与三维流场解析响应流量和压力特性基本一致的前提下,建立了多阀口耦合节流工作的数值计算模型;通过拓扑变量空间的正交实验,得到了各阀口不同开度下随面积变化的流量变化趋势、压力峰值、压力损失等的灵敏度;在有限拓扑变量约束条件下,以期望流量变化趋势与能量损失最小化为目标,构建了多路换向阀耦合节流槽结构的拓扑变量空间设计模型。仿真结果表明,设计结果在保留原有流量特性的基础上降低了能量损失,实现了工作阀口节流耦合效应优化,说明该方法可以简化表达此类耦合结构设计问题。 展开更多
关键词 多路阀 节流槽 拓扑变量空间 多目标设计
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A New Type of Conserved Quantity of Mei Symmetry for Relativistic Variable Mass Mechanical System in Phase Space
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作者 ZHANG Xiao-Ni FANG Jian-Hui LIN Peng PANG Ting 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第5期1145-1147,共3页
In this paper, a new type of conserved quantity directly deduced from the Mei symmetry for relativistic variable mass system in phase space is studied. The definition and the criterion of the Mei symmetry for the syst... In this paper, a new type of conserved quantity directly deduced from the Mei symmetry for relativistic variable mass system in phase space is studied. The definition and the criterion of the Mei symmetry for the system are given. The conditions for existence and the form of the new conserved quantity are obtained. Finally, an example is given to illustrate the application of the results. 展开更多
关键词 RELATIVITY variable mass system phase space Mei symmetry new conserved quantity
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Generalized Quasi-Variational Inequalities on Paracompact Sets
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作者 张昌斌 李岱 《Chinese Quarterly Journal of Mathematics》 CSCD 1998年第3期81-85, ,共5页
Taking advantage of result in [1], this paper studied generalized quasi variational inequalities on paracompact sets, unified and extended corresponding results in [4-6].
关键词 paracompact set generalized quasi variational inequality
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Generalized Bi quasi variational Inequalities in Locally Convex Topological Vector Spaces
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作者 曾六川 《Chinese Quarterly Journal of Mathematics》 CSCD 1999年第3期43-53, ,共11页
In this paper we investigate generalized bi quasi variational inequalities in locally convex topological vector spaces. Motivated and inspired by the recent research work in this field,we establish several existence t... In this paper we investigate generalized bi quasi variational inequalities in locally convex topological vector spaces. Motivated and inspired by the recent research work in this field,we establish several existence theorems of solutions for generalized bi quasi variational inequalities,which are the extension and improvements of the earlier and recent results obtained previously by many authors including Sun and Ding [18],Chang and Zhang [23] and Zhang [24]. 展开更多
关键词 generalized bi quasi variational inequality locally convex topological vector space bilinear functional
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A Version of Ekeland's Variational Principle in Countable Semi-Normed Spaces
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作者 丘京辉 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2004年第1期1-6,共6页
In this paper, a now version of Ekeland's variational principle in countable semi-normed spaces is given.
关键词 Ekeland's variational principle topological vector space countable seminormed space.
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