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Flow Field simulation and Parameter analysis of Hydraulic Unbalanced Bionic Self-recovery Actuator for Rotary Equipment

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Journal of Bionic Engineering 2024年第1期21卷 325-343页

作者： Wei Li Xin Pan Dehong Ge Jinji Gao Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of High-End Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing 100029China

The rotor is the most important component of rotating machinery,and the vibration produced by its mass unbalance has a serious influence on the secure and steady operation of the machine,so an effective online suppression technology is urgently needed.A new hydraulic unbalanced bionic self-recovery system is introduced,imitating the way of manually repairing faulty *** accomplish the effect of actuator mass redistribution,the technology employs pressurized air to drive the quantitative transfer of liquid in the reservoir cavity at opposite *** can complete the online adjustment of the equipment's balancing state and suppress the unbalanced vibration of equipment in real time,which gives the equipment the ability to maintain an autonomous health state and improve equipment *** composition and working principle of the system are introduced in detail,and the key performance parameters,such as the minimum running speed and the balancing liquid transfer speed,are analyzed *** fluid-solid coupling model of the actuator was established,and the two-phase flow from inside the hydraulic unbalanced bionic self-recovery actuator was simulated under multiple working conditions and the performance parameters were quantitatively analyzed.A balancing simulation test bed was built,and its effectiveness was verified by performance parameter tests and unbalanced bionic self-recovery *** experimental results show that the mass distribution adjustment of the balancing disk can be achieved using different viscosity balancing liquid,and the response of liquid viscosity 10 cSt is faster than that of liquid viscosity 100 cSt in the process of balancing liquid transfer,and the time is reduced by more than 75%;the system can reduce the simulated rotor amplitude from 18.3μm to 10.6μm online in real time,which provides technical support for the subsequent development of a new generation of bionic intelligent equipment.

关键词： Engineering self-recovery-Bionics simulation analysis Self-recovery regulation

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simulation analysis and Experimental Study of Defect Detection Underwater by ACFM Probe

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China Ocean Engineering 2013年第2期27卷 277-282页

作者：李伟陈国明张传荣刘涛 Centre for Offshore Engineering and Safety Technology China University of Petroleum

This article studies the application of the alternating current field measurement （ACFM） method in defect detection for underwater structures. Numerical model of the ACFM system is built for structure surface defect detection in seawater environment. Finite element simulation is performed to investigate rules and characteristics of the electromagnetic signal distribution in the defected area. In respect of the simulation results, underwater artificial crack detection experiments are designed and conducted for the ACFM system. The experiment results show that the ACFM system can detect cracks in underwater structures and the detection accuracy is higher than 85%. This can meet the engineering requirement of underwater structure defect detection. The results in this article can be applied to establish technical foundation for the optimization and development of ACFM based underwater structure defects detection system.

关键词： ACFM underwater structure defect detection simulation analysis experimental study

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simulation analysis of regional surface mass anomalies inversion based on different types of constraints

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Geodesy and Geodynamics 2021年第4期12卷 298-307页

作者： Bo Zhong Jiangtao Tan Qiong Li Xianpao Li Tao Liu School of Geodesy and Geomatics Wuhan UniversityWuhan430079China Key Laboratory of Geospace Environment and Geodesy Ministry of EducationWuhan UniversityWuhan430079China School of Civil Engineering and Geomatics Southwest Petroleum UniversityChengdu610500China

Surface mass anomalies estimated by mass concentration(mascon)approach using Gravity Recovery and Climate Experiment(GRACE)observations with regularization constraints generally present higher spatial resolution than the spheric harmonic(SH)*** analyze the influence of different types of constraints on the estimation of mascon solutions,we carried out a closed-loop simulation experiment to estimate surface mass anomalies over South America based on simulated GRACE intersatellite geopotential *** regularization with spatial constraint(SC),uniform weighting constraint(UWC),and a prior information constraint(APC)were employed to stabilize the mascon solutions,and the corresponding optimal regularization parameters were determined based on the minimum residual root-mean-square(RMS)*** results show that mascon solutions estimated under different types of constraints are consistent and equivalent when the optimal regularization parameters are *** spatial distributions and main characteristics of regional surface mass anomalies estimated by the three types of constraints agree well,and the values of residual RMS with different constraints are very *** due to the smoothing effect of regularization,the signal strength of mascon solutions is a bit weaker than that of original true signal,especially in the regions with strong *** addition,due to the ill-conditioned problem is more serious for higher grid resolution,the relative contribution of the three types of constraints to the final mascon solutions would be *** results show that the averages of relative contribution percentages of these constraints for 2°×2° mascon grids are 80%-90%,while the corresponding values for 4°×4° mascon grids are 30%-60%.However,based on the minimum residual RMS criterion,the accuracy of estimation results is not affected by the type of constraints and their relative contribution to the final mascon solutions.

关键词： Regional surface mass anomalies Regularization constraints Intersatellite geopotential differences GRACE mascon solutions simulation analysis

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simulation analysis and Research of C70GB Fuel Cell Vehicle

Simulation Analysis and Research of C70GB Fuel Cell Vehicle

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2016中国汽车工程学会年会暨展览会

作者： Chen Ping Liang Chen Li Jiangqiu Jiang Hongliang State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing Electric Vehicle Co. Ltd.

ISBN: (纸本)9789811035272;9789811035265

Due to long endurance mileage and short fueling time,fuel cell vehicle had became the main development direction of range extend electric *** order to improve the service life and tech- characteristics,many departments carried out research related to the fuel cell and control system of fuel cell *** this study,the power systems,fuel cell systems,power battery systems and other simulation systems were constructed and tested for C70 GB model,and calculate the power,energy consumption and other aspects of the *** simulation results show that the fuel cell can effectively improve the energy power battery vehicle system dynamic and climbing performance,equipped with two 70 MPa cylinders can effectively extend the mileage of the vehicle,and ensure daily using demand.

关键词： new energy vehicle fuel cell power system simulation analysis research

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simulation analysis of BLDC Motor Three Step Starting 2011

Simulation Analysis of BLDC Motor Three Step Starting

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2011 International Conference on Control, Automation and Systems Engineering(CASE)

作者： Wang Zhongwei Liu Haiting Zhao Xueping School of Information and Communication Engineering Tianjin Polytechnic University

To design high performance sensorless Brushless DC Motor control system, computer simulation technology is adopted to analyze the process of three-step starting process. Firstly, Park transform and Cl

ISBN: (纸本)9781457708596

关键词： link voltage MATLAB starting process Logarithmic simulation analysis Curves acceleration brushless direct current motor

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simulation analysis on the regulation of overflow ecological water consumption in arid areas——A case study in the Canmrik ecological area of the mainstream zone of the Tarim River

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Science China Earth Sciences 2007年第S1期 1-8页

作者： CHEN Xi1, HUANG Yue1, 2, QIAN Jing1, 3, LIU HaiLong1, 2, FENG XianWei1, 2, LIU Ying1, 2, BAO AnMing1 & WANG WeiSheng1 1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3 Hong Kong Baptist University, Hong Kong, China

After analyzing the regulation of overflow ecological water consumption in the Canmrik ecological area of mainstream zone of the Tarim River, in this paper a model of ecological bifurcation is developed, the dynamic overflow process of ecological bifurcation is simulated, and the quantitative relationships between the volume of ecological water consumption and the ecological conservation extent and overflow time are analyzed using GIS, advance of freshet and RS means. The results reveal that the effects of discharge and time of ecological bifurcation on the efficiency of ecological water consump-tion are significant, there is a geometrical exponential relationship between the efficiency of ecological bifurcation and the water supply with different discharges and different times under the same eco-logical water consumption, hypsography plays an important role in ecological water consumption, the regulation of ecological water consumption cannot be equated with the ordinary farming irrigation system, a serious water waste will result and the prospective ecological benefits will not be able to be achieved if an ordinary ecological bifurcation is implemented. The efficiency of ecological water con-sumption can be increased by 30% by selecting the bifurcation schemes in an optimized way, which is of the utmost importance for arid areas with shortage of water resources.

关键词： continental river ecological water consumption artificial regulation simulation analysis

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simulation analysis and Optimization of Rolling Process of Steel Rim

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World Journal of Mechanics 2021年第3期11卷 34-51页

作者： Wenhua Lv Mao Pang Shunping Li Miaolong Cao School of Mechanical and Energy Engineering Zhejiang University of Science and Technology Hangzhou China Zhejiang Jingu Company Limited Hangzhou China

In order to solve the problems of rolling forming accuracy and fillet thinning of alloy steel rim, a three-dimensional model of three pass rolling process was established, and the influence of different process parameters on forming quality was analyzed by using the finite element software, and the optimal process parameter combination was obtained. On this basis, the simulation results of wheel rim stress and strain for each pass rolling are analyzed, and the particle tracking technology is introduced to analyze the variation rule of stress in each incremental step. Finally, the simulation and experimental results show that the simulation thickness is basically consistent with the actual thickness, which improves the accuracy of rim rolling forming, and further verifies the correctness of rolling process simulation.

关键词： Roll Forming Parameter Optimization simulation analysis Thickness Verification

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simulation analysis Module of High-speed Rail Bearings Based on Secondary Development in ADAMS

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Computer Aided Drafting,Design and Manufacturing 2013年第3期23卷 46-50页

作者： ZHANG Li YE Jun XU Juan LUO Yi-chao School of Machinery and Automobile Engineering Hefei University of Technology Hefei 230009 China Luoyang Bearing Science&Technology Co. Ltd Luoyang 471039 China School of Computer and Information Hefei University of Technology Hefei 230009 China

This paper develops a strong secondary development based on ADAMS feature which creates high-speed rail bearings for simulation analysis module. This thesis is in the case of non-circular pattern instructions of how to achieve rapid roller modeling, with analysis of functions and parameters required for the design of the simulation module of the high-speed rail bearing, as well as the design of dialog boxes, the environment and file structure. The specific modules is based on the secondary development language provided by ADAMS ! View. Through the menus, dialog boxes which input parameters, it can achieve high iron bearing automatic modeling, dynamic analysis and post-processing to simplify the analysis of high-speed rail bearing operations, as well as improving the high-speed rail bearing development efficiency.

关键词： ADAMS secondary development high-speed rail bearing simulation analysis

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simulation and experimental analysis of melt pool evolution in laser engineered net shaping

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Theoretical & Applied Mechanics Letters 2022年第5期12卷 332-340页

作者： Zhuangzhuang Mao Wei Feng Ce Hao Zhanwei Liu School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China AECC Commercial Aircraft Engine Co.Ltd. Shanghai 200241China

In this work,the evolution of melt pool under single-point and single-line printing in the laser engineered net shaping(LENS)process is ***,the basic structure of the melt pool model of the LENS process is established and the necessary assumptions are ***,the establishment process of the multi-physical field model of the melt pool is introduced in *** is concluded that the simulation model results are highly consistent with the online measurement experiment results in terms of melt pool profile,space temperature gradient,and time temperature ***,some parameters,such as the 3D morphology and surface fluid field of the melt pool,which are not obtained in the online measurement experiment,are ***,the influence of changing the scanning speed on the profile,peak temperature,and temperature gradient of the single-line melt pool is also analyzed,and the following conclusions are obtained:With the increase in scanning speed,the profile of the melt pool gradually becomes slender;The relationship between peak temperature and scanning speed is approximately linear in a certain speed range;The space temperature gradient at the tail of the melt pool under different scanning speeds hardly changes with the scanning speed,and the time temperature gradient at the tail of the melt pool is in direct proportion to the scanning speed.

关键词： Additive manufacturing Laser engineered net shaping Melt pool evolution simulation analysis Temperature measurement

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THE simulation analysis OPTIMIZATION DESIGN OF SPACE-FED PILL-BOX OF PHASED ARRAY ANTENNA

THE SIMULATION ANALYSIS OPTIMIZATION DESIGN OF SPACE-FED PIL...

引用

1996 CIE International Conference of Radar(ICR’96)

作者： GONG ZHENGJUN LIANG CHANGHONG RADAR INSTITUTE OF THE HUANGHE MACHINE BUILDING FACTORY XIDIAN UNIVERSITY

ISBN: (纸本)0780329147

＜正＞A numerical method for analyzing pill-box feeding system of phased array antenna is presented on the basis of function analysis under ideal condition. The method introduces the environment correction factor of the radiation field by means of using data fitting process and miniaturization measurement technique to execute the system simulation so as to acquire the analysis express of aperture field of space-fed pill-box system in phased array ***,the optimum design is carried *** last part of this papers gives a set of optimum design parameters of an actual space feeding *** experiment results show that the method described is useful for engineering design.

关键词： antenna phased arrays antenna feeds optimisation numerical analysis simulation analysis optimization optimum design parameters pill-box feeding system phased array antenna space-fed pill-box system space feeding system numerical method function analysis environment correction factor radiation field data fitting process aperture field

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