检索结果-内蒙古大学图书馆

41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012

作者： Tanaka, Toshimitsu Ishihara, Toshitugu Inomata, Keiko Tsugihashi, Kazuki Department of System Design Engineering Faculty of Science and Technology SEIKEI University 3-3-1 Kichijoji-kitamachi Musashino-shi Tokyo 180-8633 Japan Mechanical Engineering Laboratory Kobe Steel Co. Ltd 1-5-5 Takatsukadai Nishi-ku Kobe-shi Hyogo 651-2271 Japan

ISBN: (纸本)9781627485609

Double leaf insulating wall is widely applied in many fields, such as air-planes, high-speed trains cars and so on, because the performance of transmission loss is higher than that of single panel of the same weight. But transmission loss of double leaf wall is apt to be decreased by resonance between the panels and air space of the wall. Local depression of transmission loss by resonance transmission is often observed. We tried to improve this problem of transmission loss by using dynamic vibration absorber. Our purpose was to investigate the effectiveness of the small and light-weight dynamic vibration absorbers and suitable positions to set them, and to investigate the usefulness of computational analysis for this problem through experiments. We found that even dynamic vibration absorbers were small and light-weight, they were effective, if they had suitable vibration damping and they were equipped at suitable positions. We found that the most suitable position to be equipped and the amount of improvement for transmission loss were computed fairly well by comparing between experimental and computed results. And it was observed and confirmed that the dynamic vibration absorber worked to excite the vibration modes to arise acoustic cancellation effectively through using lazer Doppler scanning apparatus and computed visualizations of surface vibration modes of the panel.

关键词： Railroad cars

来源：评论

学校读者我要写书评

暂无评论

Offshore code comparison collaboration continuation (OC4), phase I - Results of coupled simulations of an offshore wind turbine with jacket support structure

Offshore code comparison collaboration continuation (OC4), p...

引用

22nd International Offshore and Polar Engineering Conference, ISOPE-2012

作者： Popko, Wojciech Vorpahl, Fabian Zuga, Adam Kohlmeier, Martin Jonkman, Jason Robertson, Amy Larsen, Torben J. Yde, Anders Sætertrø, Kristian Okstad, Knut M. Nichols, James Nygaard, Tor A. Gao, Zhen Manolas, Dimitris Kim, Kunho Yu, Qing Shi, Wei Park, Hyunchul Vásquez-Rojas, Andrés Dubois, Jan Kaufer, Daniel Thomassen, Paul De Ruiter, Marten J. Peeringa, Johan M. Zhiwen, Huang Von Waaden, Heike Fraunhofer Institute for Wind Energy and Energy System Technology IWES Bremerhaven Germany National Renewable Energy Laboratory Golden United States Technical University of Denmark Department of Wind Energy Campus Risø Roskilde Denmark Fedem Technology AS Trondheim Norway Garrad Hassan and Partners Ltd. Bristol United Kingdom Institute for Energy Technology Kjeller Norway Centre for Ships and Ocean Structures Norwegian University of Science and Technology Trondheim Norway National Technical University of Athens Zografou Greece American Bureau of Shipping Houston United States Pohang University of Science and Technology Pohang Korea Republic of Institute of Steel Construction at the Leibniz Universität Hannover Hannover Germany Endowed Department of Wind Energy Institute of Aircraft Design Universität Stuttgart Stuttgart Germany Norwegian University of Science and Technology Trondheim Norway Knowledge Centre WMC Wieringerwerf Netherlands Energy Research Centre of the Netherlands Petten Netherlands China General Certification Beijing China REpower Systems SE Osnabrück Germany

ISBN: (纸本)9781880653944

In this paper, the exemplary results of the IEA Wind Task 30 "Offshore Code Comparison Collaboration Continuation" (OC4) Project - Phase I, focused on the coupled simulation of an offshore wind turbine (OWT) with a jacket support structure, are presented. The focus of this task has been the verification of OWT modeling codes through code-to-code comparisons. The discrepancies between the results are shown and the sources of the differences are discussed. The importance of the local dynamics of the structure is depicted in the simulation results. Furthermore, attention is given to aspects such as the buoyancy calculation and methods of accounting for additional masses (such as hydrodynamic added mass). Finally, recommendations concerning the modeling of the jacket are given. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Offshore wind turbines

来源：评论

学校读者我要写书评

暂无评论

Condition II Transients Analysis for Pellet Clad Interaction (PCI)

Condition II Transients Analysis for Pellet Clad Interaction...

引用

The Fifth China-Korea Workshop on Nuclear reactor Thermal Hydraulics

作者： Bi Shumao Shen Caifen Science and Technology on Reactor System Design Technology Laboratory

During an overpower transient, the fuel rod cladding may be subjected to major stresses due to differential expansion of the fuel and the cladding. This may lead to clad failure through the Pellet Clad Interaction (PCI) phenomenon. So the aim of this paper is to present the linear power reached during the most limiting condition II transients(Excessive Load Increase (ELI), Uncontrolled RCCA Withdrawal at Power (URWP) and undetected Rod Drop (RD)) with respect to Qinshan-II long cycle fuel management project PCI analysis.

关键词： ELI PCI Condition II Transients Analysis for Pellet Clad Interaction

来源：评论

学校读者我要写书评

暂无评论

CFD Analysis on Hydrogen Distribution in Subcompartment of 600MW NPP under Severe Accident

CFD Analysis on Hydrogen Distribution in Subcompartment of 6...

引用

The Fifth China-Korea Workshop on Nuclear reactor Thermal Hydraulics

作者： ZOU Zhi-qiang ZHANG Yu DENG Jian Science and Technology on Reactor System Design Technology Laboratory

Hydrogen combustion in the containment building may be a threat to containment *** in some subcompartments,hydrogen detonation is more easier to happen,which may destroy the containment structure or the safety equipments in the containment. A study has been carried out using the GASFLOW three-dimensional CFD code to evaluate the hydrogen distribution in the subcompartment during a severe *** Chinese 600MW NPP containment is modeling by GASFLOW. The GASFLOW calculation gave detailed results for the spatial distribution of gas concentrations in the reactor coolant pump（RCP） compartment and the steam generator（SG） compartment within containment.

关键词： Subcompartment Hydrogen LBLOCA+ failure of ECCS CFD

来源：评论

学校读者我要写书评

暂无评论

The precursory cooling characteristics of the reflooing in tight lattice

The precursory cooling characteristics of the reflooing in t...

引用

The Fifth China-Korea Workshop on Nuclear reactor Thermal Hydraulics

作者： Dan Wu Hongxing Yu Science and Technology on Reactor System Design Technology Laboratory

The advanced pressurized water reactor with a tight hexagonal lattice has its potential to improve uranium utilization. With a smaller pitch-to-diameter ratio(p/d) ranging from 1.06 to 1.20, a major problem is the emergency core cooling in a loss-of-coolant accident. The NEPTUN-III and FLORESTAN flooding experiments at PSI and KfK have been performed during the verification period 1985-1990, and the results shows that the reflooding behavior of LWHCR is quite different from that of LWR with higher peak clad temperatures and smaller quench rates. The existing system codes like RELAP5, CATHARE, TRAC may not be able to be used in the calculations of the reflooding phase of LWHCR. Though some efforts have been put into the validation of the improvement of codes, the results are not so good. In this study, the characteristics of the reflooding behavior of tight lattice are pointed out, and the deficiencies of the reflooding models of RELAP5/MOD3 are also fount out after a simulation of the NEPTUN-III reflooding test. The precursory cooling in tight lattice is not effective especially at low reflooding rates (<4cm/s), the droplet enhancement is not significant compared to LWR, and the vapor Reynolds number is much smaller. Finally, a few modifications to RELAP5/MOD3 are made. Compared with the original code, the modified one can better predict the reflooding phase of tight lattice especially the peak clad temperatures at low reflooding rates. More work should be done to deal with the heat transfer characteristics in the transition region of reflooding in tight lattice..

关键词： reflood tight lattice RELAP5 precursory cooling

来源：评论

学校读者我要写书评

暂无评论

Research on characteristic of the inverted annular flow regime during the narrow channel

Research on characteristic of the inverted annular flow regi...

引用

The Fifth China-Korea Workshop on Nuclear reactor Thermal Hydraulics

作者： Wei ZENG Science and Technology on Reactor System Design Technology

plate fuel assembly is widely used as the research reactor core geometry due to the narrow rectangular channel benefit, but the research on the post-CHF thermal-hydraulic characteristics in the narrow rectangular channel is few. Once the loss of coolant accident (LOCA) happens the post-CHF thermal-hydraulic characteristics is important for the accident mitigation. This paper studies the characteristics of the inverted annular flow regime during the narrow channel through the comparison between narrow and general channel inside tube heat reflooding experiment, give the assumptions of the post-CHF reflooding flow regime. Then through the comparison of narrow annular channel experimental wall temperature with the RELAP5 simulation wall temperature for this experiment process. The far downstream of the quench front heat flux is obviously lower than the calculated value, so the wall temperature is higher than the calculated wall temperature. The quality is assumed lower during the far downstream of the quench front in the narrow channel experiment. Because the liquid is consumed during the close downstream of the quench front. Through the comparison of the wall temperature between the calculated by code and experimental value, the liquid core in the inverted annular flow regime which may appears during close downstream of the quench front shortly will breakup earlier due to the more severe surrounding steam disturbing, bringing on the quickly consumption of the liquid, then the quality during far downstream of the quench front is higher than general channel.

关键词： RELAP Research on characteristic of the inverted annular flow regime during the narrow channel

来源：评论

学校读者我要写书评

暂无评论

Development and Validation of a CFD Code for Direct Numerical Simulation

Development and Validation of a CFD Code for Direct Numerica...

引用

The Fifth China-Korea Workshop on Nuclear reactor Thermal Hydraulics

作者： Jie Li Science and Technology on Reactor System Design Technology

Direct numerical simulation is a powerful research tool, which provides a level of information and accuracy that cannot be equaled with other approaches. In this paper, the development of a CFD code for direct numerical simulation is described, which is named dnsPisoFoam. In order to validate the code, direct numerical simulation of channel flow with dnsPisoFoam was performed. The present results are compared with existing simulation results and shows good agreement.

关键词： Direct Numerical Simulation dnsPisoFoam Channel Flow

来源：评论

学校读者我要写书评

暂无评论

Research on fractional order controller based on best rational approximation approach

引用

Journal of Convergence Information technology 2012年第4期7卷 50-58页

作者： Zhao, Huimin Nie, Bing Li, Wen Deng, Wu Software Institute Dalian Jiaotong University Dalian 116028 China Key Laboratory of Numerical Simulation in the Sichuan Provincial College Neijiang Normal University Neijiang 641112 China Artificial Intelligence Key Laboratory of Sichuan Province Sichuan University of Science and Engineering Zigong 643000 China State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Electrical Engineering Chongqing University Chongqing 400044 China Key Laboratory of advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian 116622 China

Introduce the basic concept of best rational approximation and constructing procedure of the best rational approximation function in Laplace domain. By an illustrative example the design method of FOC based on best rational approximation is discussed. The performance comparison of transfer functions between the FOC obtained by best rational approximation method and conventional PID shows that it is effective to apply the method in design of FOC, which can guarantee maximum absolute error of amplitude frequency characteristic of approximation function in a given error tolerance.

关键词： Rational functions

来源：评论

学校读者我要写书评

暂无评论

Strength analysis for pre-stressed bolted joints of turntable bearings

Strength analysis for pre-stressed bolted joints of turntabl...

引用

2011 International Conference on Electronic and Mechanical Engineering and Information technology, EMEIT 2011

作者： Xu, Weiwei Liu, Hongbin Xue, Yujun Li, Jishun School of Mechatronics Engineering Henan University of Science and Technology Luoyang 471003 China Henan Key Laboratory for Machinery Design and Transmission System Henan University of Science and Technology Luoyang 471003 China State Key Laboratory of Mining Heavy Equipment Luoyang 471039 China

ISBN: (纸本)9781612840857

This paper describes a calculation model for pre-stressed bolted joints used to connect turntable bearing to the flanges. A traditional pre-stressed bolted joint calculation model is described and its insufficiencies for the direct application on turntable bearings are pointed out. The suggested stress analysis is done by modeling the most loaded single bolt segment of the turntable bearing assembly, applying the preload and the working load on it. The alternating stress in the bolt is done by finite element analysis. The results show that the alternating load of the bolt is significantly decreased and is lower than the fatigue limit of the bolt under the condition of the larger tightening force. Therefore, it should be possible to increase the preload in the conditions that the maximum stress of bolt is below its yield limit stress situation. © 2011 IEEE.

关键词： Stress analysis

来源：评论

学校读者我要写书评

暂无评论

Model design of new product management information system based on BPR

Model design of new product management information system ba...

引用

2011 International Conference on system science, Engineering design and Manufacturing Informatization, ICSEM 2011

作者： Jia, Xianzhao Dong, Fei Liu, Hongbin School of Electrical Engineering Henan University of Science and Technology Luoyang 471003 China Henan Key Laboratory of Modem Mechanical Design and Transmission System Luoyang 471003 China

ISBN: (纸本)9781457702471

Based on BPR theory, the new product development and manufacturing process status of a discrete manufacturing enterprise was analysed with finding out its existing problems, then a new reasonable process was designed and the model of management information system was established. Through the analysis of this case, this paper provides a reference for other similar enterprises to manage new product development and promote the development of enterprise information. © 2011 IEEE.

关键词： Information management

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：