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Introduction to Mesh Based Generated Lumped Parameter Models for Electromagnetic Problems using Triangular Elements
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作者 Haidar Y.Diab Salim Asfirane +2 位作者 Nicolas Bracikowski Frédéric Gillon Yacine Amara 《CES Transactions on Electrical Machines and Systems》 CSCD 2023年第1期21-34,共14页
This paper is an introduction to mesh based generated reluctance network modeling using triangular elements.Many contributions on mesh based generated reluctance networks using rectangular shaped elements have been pu... This paper is an introduction to mesh based generated reluctance network modeling using triangular elements.Many contributions on mesh based generated reluctance networks using rectangular shaped elements have been published,but very few on those generated from a mesh using triangular elements.The use of triangular elements is aimed at extending the application of the approach to any shape of modeled devices.Basic concepts of the approach are presented in the case of electromagnetic devices.The procedure for coding the approach in the case of a flat linear permanent magnet machine is presented.Codes developed under MATLAB environment are also included. 展开更多
关键词 lumped parameter modeling Finite element method MESH Triangular elements Electromagnetic devices modelING
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Introduction to Mesh Based Generated Lumped Parameter Models for Electromagnetic Problems 被引量:2
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作者 Shuo Yang Salim Asfirane +6 位作者 Sami Hlioui Smail Mezani Guillaume Krebs Yacine Amara Georges Barakat Mohamed Gabsi Wei Hua 《CES Transactions on Electrical Machines and Systems》 CSCD 2021年第2期152-162,共11页
This paper is an introduction to mesh based generated reluctance network modeling.An overview of scientific works which led to the development of this approach is first presented.Basic concepts of the approach are the... This paper is an introduction to mesh based generated reluctance network modeling.An overview of scientific works which led to the development of this approach is first presented.Basic concepts of the approach are then presented in the case of electromagnetic devices.A step-by-step procedure for coding the approach in the case of a flat linear permanent magnet machine is presented.Codes developed under MATLAB and Scilab environments are also included. 展开更多
关键词 lumped parameter modeling finite element method MESH electromagnetic devices modelING
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Lumped Parameter Mass Flow Rate and Pressure Control Characteristics Model for High-Speed Pneumatic PWM on/off Valve
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作者 向忠 胡旭东 +1 位作者 刘昊 汝晶炜 《Journal of Donghua University(English Edition)》 EI CAS 2014年第3期293-303,共11页
Aiming at solving the problem of strong coupling characteristic of the key parameters of high-speed pneumatic pulse width modulation( PWM) on / off valve, a general lumped parameter mathematical model based on the val... Aiming at solving the problem of strong coupling characteristic of the key parameters of high-speed pneumatic pulse width modulation( PWM) on / off valve, a general lumped parameter mathematical model based on the valves time periods was well developed. With this model,the mass flow rate and dynamic pressure characteristics of constant volumes controlled by high-speed pneumatic PWM on /off valves was well described. A variable flow rate coefficient model was proposed to substitute for the constant one used in most of the prior works to investigate PWM on /off valves' dynamical pressure response, and a formula for disclosing the inherent relationship among the PWM command signal,static mass flow rate,and sonic conductance of the valve was newly derived.Finally,an extensive set of analytical experimental comparisons were implemented to verify the validity of the proposed mathematica model. With the proposed model, PWM on /off valves' characteristics,such as mass flow rate,step pressure response of the valve control system,mean pressure and ripple amplitude,not only in the linear range,but also in the nonlinear range can be wel predicted; Good agreement between measured and calculated results was obtained,which proved that the model is helpful for designing a control strategy in a closed loop control system. 展开更多
关键词 lumped parameter model pneumatic on/off valve pulse width modulation(PWM) mass flow rate pressure characteristic
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LUMPED-PARAMETER MODEL OF MASS TRANSFER IN HEMODIALYZER WITH ULTRAFILTRATION
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作者 张凤宝 张国亮 +1 位作者 陈涛 王绍亭 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1995年第1期60-65,共6页
1 INTRODUCTIONHemodialysis with ultrafiltration,also called hemodiafiltration(HDF),is a main methodof treatment for patients with chronic renal failure.The HDF procedure providesadequate removals of both small and mid... 1 INTRODUCTIONHemodialysis with ultrafiltration,also called hemodiafiltration(HDF),is a main methodof treatment for patients with chronic renal failure.The HDF procedure providesadequate removals of both small and middle molecular weight toxic substamces fromuremic blood,which is not possible by dialysis or ultrafiltration alone.According toclinical experience[1],the HDF procedure is well accepied by the patients,and thetreatment time is reduced by using it. 展开更多
关键词 lumped-parameter model HEMODIALYSIS ULTRAFILTRATION mass TRANSFER PERTURBATION
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Review on lumped parameter method for modeling the blood flow in systemic arteries 被引量:4
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作者 Isidor Kokalari Theodhor Karaja Maria Guerrisi 《Journal of Biomedical Science and Engineering》 2013年第1期92-99,共8页
The cardiovascular system is characterized by complex interactions between various control mechanisms and physiological processes. Different approaches are used to provide better diagnostics and physiological understa... The cardiovascular system is characterized by complex interactions between various control mechanisms and physiological processes. Different approaches are used to provide better diagnostics and physiological understanding, cardiac prosthesis and medical planning. The mathematical description and modelling of the human cardiovascular system plays nowadays an important role in the comprehension of the genesis and development of cardiovascular disorders by providing computer based simulation of dynamic processes in this system. This paper aims to give an overview on lumped parameter models that have been developed by many researchers all over the world, to simulate the blood flow in systemic arteries. Surveying various references we make a review of different approaches to arterial tree modelling and discuss on the applications of such models. 展开更多
关键词 Fluid Dynamics MATHEMATICAL modelling CARDIOVASCULAR System ARTERIAL Tree lumped parameter models
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A modified lumped parameter model of distribution transformer winding 被引量:5
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作者 Qingqing Ding Yao Yao +5 位作者 Bingqian Wang Jingwei Fu Wei Zhang Chao Zeng Xiaoping Li Stanimir Valtchev 《Global Energy Interconnection》 2020年第2期158-165,共8页
The modelling of the distribution transformer winding is the starting point and serves as important basis for the transformer characteristics analysis and the lightning pulse response prediction.A distributed paramete... The modelling of the distribution transformer winding is the starting point and serves as important basis for the transformer characteristics analysis and the lightning pulse response prediction.A distributed parameters model can depict the winding characteristics accurately,but it requires complex calculations.Lumped parameter model requires less calculations,but its applicable frequency range is not wide.This paper studies the amplitude-frequency characteristics of the lightning wave,compares the transformer modelling methods and finally proposes a modified lumped parameter model,based on the above comparison.The proposed model minimizes the errors provoked by the lumped parameter approximation,and the hyperbolic functions of the distributed parameter model.By this modification it becomes possible to accurately describe the winding characteristics and rapidly obtain the node voltage response.The proposed model can provide theoretical and experimental support to lightning protection of the distribution transformer. 展开更多
关键词 Wide band frequency response Distributed parameter model lumped parameter model Distribution transformer Lightning protection
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An improved lumped parameter model predicting attenuation of earmuff with air leakage
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作者 Xu Zhong Zhe Chen Dong Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第11期364-370,共7页
Since air leakage is inevitable when earmuffs are worn improperly or together with safety glasses in factory or military,it is required to be considered to accurately predict earmuff attenuation.Besides unwanted air l... Since air leakage is inevitable when earmuffs are worn improperly or together with safety glasses in factory or military,it is required to be considered to accurately predict earmuff attenuation.Besides unwanted air leakage,under controlled air leakage is introduced to earmuff to achieve adjustable attenuations in different signal-to-noise ratios(SNRs)and balance between attenuation and speech intelligibility.This work is to develop an improved lumped parameter model(LPM)to predict earmuff attenuation with consideration of air leakage.Air leakage paths are introduced into conventional LPM without air leakage,and air leakage path impedance is analytically described by Maa’s microperforated tube impedance.Earmuff passive attenuation behavior can be analytically described and analyzed with the improved LPM.Finally,the validity of improved LPM is verified experimentally.The results indicate that the improved LPM can predict earmuff attenuation with air leakage,and air leakage deteriorates earmuff attenuation and turns resonance frequency higher. 展开更多
关键词 earmuff lumped parameter model air leakage ATTENUATION
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Parameter Extraction for 2-π Equivalent Circuit Model of RF CMOS Spiral Inductors 被引量:1
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作者 高巍 余志平 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第4期667-673,共7页
A novel parameter extraction method with rational functions is presented for the 2-πequivalent circuit model of RF CMOS spiral inductors. The final S-parameters simulated by the circuit model closely match experiment... A novel parameter extraction method with rational functions is presented for the 2-πequivalent circuit model of RF CMOS spiral inductors. The final S-parameters simulated by the circuit model closely match experimental data. The extraction strategy is straightforward and can be easily implemented as a CAD tool to model spiral inductors. The resulting circuit models will be very useful for RF circuit designers. 展开更多
关键词 2-π compact model parameters extraction RF CMOS spiral inductors
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Application of Bayesian Approach in the Parameter Estimation of Continuous Lumping Kinetic Model of Hydrocracking Process 被引量:1
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作者 S. Sina Hosseini Boosari Neda Makouei Philip Stewart 《Advances in Chemical Engineering and Science》 2017年第3期257-269,共13页
Hydrocracking is a catalytic reaction process in the petroleum refineries for converting the higher boiling temperature residue of crude oil into a lighter fraction of hydrocarbons such as gasoline and diesel. In this... Hydrocracking is a catalytic reaction process in the petroleum refineries for converting the higher boiling temperature residue of crude oil into a lighter fraction of hydrocarbons such as gasoline and diesel. In this study, a modified continuous lumping kinetic approach is applied to model the hydro-cracking of vacuum gas oil. The model is modified to take into consideration the reactor temperature on the reaction yield distribution. The model is calibrated by maximizing the likelihood function between the modeled and measured data at four different reactor temperatures. Bayesian approach parameter estimation is also applied to obtain the confidence interval of model parameters by considering the uncertainty associated with the measured errors and the model structural errors. Then Monte Carlo simulation is applied to the posterior range of the model parameters to obtain the 95% confidence interval of the model outputs for each individual fraction of the hydrocracking products. A good agreement is observed between the output of the calibrated model and the measured data points. The Bayesian approach based on the Markov Chain Monte Carlo simulation is shown to be efficient to quantify the uncertainty associated with the parameter values of the continuous lumping model. 展开更多
关键词 HYDROCRACKING CONTINUOUS lumpING KINETIC model Bayesian Approach parameter Estimation MARKOV Chain MONTE Carlo
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钻柱纵-扭耦合非线性振动的顶驱控制研究
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作者 段聪聪 李欣业 +2 位作者 张利娟 张华彪 马驰骋 《振动工程学报》 EI CSCD 北大核心 2024年第9期1535-1545,共11页
本文基于钻柱纵-扭耦合振动的三自由度集总参数模型,利用数值仿真研究了顶驱控制对钻柱粘滑振动和跳钻现象的抑制效果。结果表明,调谐k-c控制对钻柱振动系统的粘滑振动和跳钻现象有一定程度的抑制作用,但是在输入角速度较大而标称钻压... 本文基于钻柱纵-扭耦合振动的三自由度集总参数模型,利用数值仿真研究了顶驱控制对钻柱粘滑振动和跳钻现象的抑制效果。结果表明,调谐k-c控制对钻柱振动系统的粘滑振动和跳钻现象有一定程度的抑制作用,但是在输入角速度较大而标称钻压较小或者输入角速度较小而标称钻压较大时的抑制效果并不理想。调谐I-k-c控制可以成功地消除输入角速度和标称钻压变化对钻柱粘滑振动和跳钻现象带来的影响,使得输入角速度和标称钻压不论取何值,钻头的转速均稳定在给定的输入角速度附近,减少了钻压、扭矩和轴向位移的波动。 展开更多
关键词 非线性振动 钻杆纵-扭耦合 顶驱控制 粘滑 跳钻 集总参数模型
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Lumped Parameter Outflow Models for 1-D Blood Flow Simulations:Effect on Pulse Waves and Parameter Estimation 被引量:1
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作者 J.Alastruey K.H.Parker +1 位作者 J.Peiro S.J.Sherwin 《Communications in Computational Physics》 SCIE 2008年第7期317-336,共20页
Several lumped parameter,or zero-dimensional(0-D),models of the microcirculation are coupled in the time domain to the nonlinear,one-dimensional(1-D)equations of blood flow in large arteries.A linear analysis of the c... Several lumped parameter,or zero-dimensional(0-D),models of the microcirculation are coupled in the time domain to the nonlinear,one-dimensional(1-D)equations of blood flow in large arteries.A linear analysis of the coupled system,together with in vivo observations,shows that:(i)an inflow resistance that matches the characteristic impedance of the terminal arteries is required to avoid non-physiological wave reflections;(ii)periodic mean pressures and flow distributions in large arteries depend on arterial and peripheral resistances,but not on the compliances and inertias of the system,which only affect instantaneous pressure and flow waveforms;(iii)peripheral inertias have a minor effect on pulse waveforms under normal conditions;and(iv)the time constant of the diastolic pressure decay is the same in any 1-D model artery,if viscous dissipation can be neglected in these arteries,and it depends on all the peripheral compliances and resistances of the system.Following this analysis,we propose an algorithm to accurately estimate peripheral resistances and compliances from in vivo data.This algorithm is verified against numerical data simulated using a 1-D model network of the 55 largest human arteries,in which the parameters of the peripheral windkessel outflow models are known a priori.Pressure and flow waveforms in the aorta and the first generation of bifurcations are reproduced with relative root-mean-square errors smaller than 3%. 展开更多
关键词 Pulse wave propagation one-dimensional modelling lumped parameter outflow models time-domain coupling arterial compliance peripheral compliance peripheral resistance multiscale modelling.
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MODELING AND EXPERIMENTAL STUDY OF A PASSIVE HYDRAULIC ENGINE MOUNT WITH INERTIA AND DIRECT-DECOUPLER 被引量:1
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作者 ZHANG Yunxia ZHANG Jianwu +1 位作者 SHANGGUAN Wenbin FENG Qishan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第3期31-35,共5页
To investigate the dynamic characteristics and damping theory of the passive hydraulic engine mount (PHEM), numerical prediction is performed through lumped parameter model. System parameters, including volume compl... To investigate the dynamic characteristics and damping theory of the passive hydraulic engine mount (PHEM), numerical prediction is performed through lumped parameter model. System parameters, including volume compliance of the decoupler chamber, effective piston area, fluid inertia and resistance of inertia track and direct-decoupler, are identified by means of experiments and finite element method (FEM). Dynamic behaviors are tested with elastomer test system for purpose of validating PHEM. With incorporation of inertia track and direct-decoupler, PHEM behaves effective and efficient vibration isolation in range of both low and high frequencies. The comparison of the numerical results with the experimental observations shows that the present PHEM achieves fairly good performance for the engine vibration isolation. 展开更多
关键词 Passive hydraulic engine mount lumped parameter model parameter identification Dynamic response
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A DYNAMIC MATHEMATICAL MODEL STUDY OFTHE PLATE-FIN HUMID HEAT EXCHANGER
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作者 LiuBoqiang YuanXiugan LiMin(Faculty 505, Beijing University of Aeronautics and Astronautics,Beijing,China,100083) 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1995年第3期179-184,共6页
ADYNAMICMATHEMATICALMODELSTUDYOFTHEPLATE-FINHUMIDHEATEXCHANGERLiuBoqiang;YuanXiugan;LiMin(Faculty505,Beijing... ADYNAMICMATHEMATICALMODELSTUDYOFTHEPLATE-FINHUMIDHEATEXCHANGERLiuBoqiang;YuanXiugan;LiMin(Faculty505,BeijingUniversityofAeron... 展开更多
关键词 exchangrrs lumped parameter systems dynamic models numerical ana-lysis
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Eigen-Space Decomposition(ESD)Method for the Design of Internal Model Controller(IMC)from Noisy Input and Output Plant Data
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作者 吴国海 华建兴 《Journal of China Textile University(English Edition)》 EI CAS 1999年第4期13-16,共4页
A novel approach to design Internal Model Controller(IMC)is proposed in this paper directly from measuredinput and output plant data,which are assumed to becontaminated by measurement noise.In order to avoidthe compli... A novel approach to design Internal Model Controller(IMC)is proposed in this paper directly from measuredinput and output plant data,which are assumed to becontaminated by measurement noise.In order to avoidthe complicated structure-identification problem inmost cases,two Finite Impulse Response(FIR)modelsare taken to represent the plant model and the internalmodel controller respectively.Taking account of mea-surement noise both in the plant input and its output,anESD based Total Least Squares(TLS)solution is appliedfor the unbiased identification of the plant model and itsinverse model,the latter constitutes the internal modelcontroller according to the principle that the internalmodel controller approximates the inverse dynamics ofthe plant model.Simulations are given for a testifica-tion. 展开更多
关键词 Internal model control total least SQUARES EIGEN - space DECOMPOSITION parameter estimation identification
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Optimal measurement locations for diagnosis of aortic abnormalities in a lumped-parameter model of the systemic circulation using sensitivity analysis
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作者 R. Gul S. Bernhard 《International Journal of Biomathematics》 2017年第8期217-240,共24页
The basic theme of this work is to identify the optimal measurement locations for pres- sure and flow in the systemic circulation to detect aortic stenoses and aneurysms in early stages of a disease. For this purpose,... The basic theme of this work is to identify the optimal measurement locations for pres- sure and flow in the systemic circulation to detect aortic stenoses and aneurysms in early stages of a disease. For this purpose, a linear elastic lumped parameter model of the fluid dynamical simulator, major arterial cardiovascular simulator (MACSim), is considered and global sensitivity analysis is applied to identify the better measurement locations for pressure and flow in the systemic circulation. The obtained results of sensitivity analysis provide insight that enable the experimentalists to optimize their experimental setups for detecting aortic stenoses and aneurysms using parameter estimation process. From the results, it is observed that the stenosis in the thoracic aorta can be identified from both pressure and flow at the location itself, nearby nodes, aorta ascendens, arcus aorta, arteria subclavia and arteria axillaris. On the other hand, the preferable measurement locations for abdominal aneurysms are locations themselves, nearby nodes and left/right leg of the body. 展开更多
关键词 lumped parameter model systemic circulation stenoses ANEURYSMS globalsensitivity analysis.
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基于磁热耦合法的非对称混合磁极永磁电机热分析 被引量:2
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作者 史立伟 刘政委 +2 位作者 乔志伟 赵新 朱英杰 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2024年第1期207-218,共12页
针对传统内置永磁电机损耗高、发热量大的问题,提出非对称混合磁极永磁电机拓扑结构.介绍非对称混合磁极永磁电机的拓扑结构,对比分析两者的电磁特性与损耗分布特性.针对非对称混合磁极永磁电机分布式绕组的结构特点,对绕组进行等效处理... 针对传统内置永磁电机损耗高、发热量大的问题,提出非对称混合磁极永磁电机拓扑结构.介绍非对称混合磁极永磁电机的拓扑结构,对比分析两者的电磁特性与损耗分布特性.针对非对称混合磁极永磁电机分布式绕组的结构特点,对绕组进行等效处理,确定等效导热系数,建立集中参数热网络模型.建立单向磁热耦合模型,计算电机各部件的温度分布,验证了热网络模型的正确性.考虑到温度对永磁材料的影响,建立双向磁热耦合模型,对比分析不同电流密度对电机温升的影响规律.试制一台样机并搭建温升试验平台进行温升试验,验证了新型拓扑结构的有效性与合理性以及磁热双向耦合法计算结果的准确性. 展开更多
关键词 永磁电机 非对称混合磁极 热分析 磁热耦合 集中参数热模型
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航空座椅垫集中参数模型研究
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作者 解江 钟欣言 +2 位作者 石霄鹏 陈英实 李威良 《中国民航大学学报》 CAS 2024年第5期9-13,27,共6页
为解决航空座椅垫由于变形较大,易导致航空座椅有限元模型冲击模拟中出现负体积和计算时间过长的问题,本文提出一种由并联的非线性弹簧和线性阻尼构成的航空座椅垫集中参数模型。首先,开展了航空座椅垫材料的静动态压缩试验,分别建立了... 为解决航空座椅垫由于变形较大,易导致航空座椅有限元模型冲击模拟中出现负体积和计算时间过长的问题,本文提出一种由并联的非线性弹簧和线性阻尼构成的航空座椅垫集中参数模型。首先,开展了航空座椅垫材料的静动态压缩试验,分别建立了航空座椅垫有限元模型和集中参数模型;其次,根据有限元仿真结果拟合了集中参数模型的弹簧阻尼参数,并对比两种模型在14、16、19 g三角脉冲下的动力学响应。结果表明,两种模型的一致性较好,本文建立的航空座椅垫集中参数模型可为含座椅垫的复杂有限元模型简化提供支持。 展开更多
关键词 航空座椅垫 集中参数模型 静动态压缩试验 有限元模型
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Performance design of a cryogenic air separation unit for variable working conditions using the lumped parameter model 被引量:1
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作者 Jinghua XU Tiantian WANG +2 位作者 Qianyong CHEN Shuyou ZHANG Jianrong TAN 《Frontiers of Mechanical Engineering》 SCIE CSCD 2020年第1期24-42,共19页
Large-scale cryogenic air separation units(ASUs),which are widely used in global petrochemical and semiconductor industries,are being developed with high operating elasticity under variable working conditions.Differen... Large-scale cryogenic air separation units(ASUs),which are widely used in global petrochemical and semiconductor industries,are being developed with high operating elasticity under variable working conditions.Different from discrete processes in traditional machinery manufacturing,the ASU process is continuous and involves the compression,adsorption,cooling,condensation,liquefaction,evaporation,and distillation of multiple streams.This feature indicates that thousands of technical parameters in adsorption,heat transfer,and distillation processes are correlated and merged into a large-scale complex system.A lumped parameter model(LPM)of ASU is proposed by lumping the main factors together and simplifying the secondary ones to achieve accurate and fast performance design.On the basis of material and energy conservation laws,the piecewise-lumped parameters are extracted under variable working conditions by using LPM.Takagi–Sugeno(T–S)fuzzy interval detection is recursively utilized to determine whether the critical point is detected or not by using different thresholds.Compared with the traditional method,LPM is particularly suitable for“rough first then precise”modeling by expanding the feasible domain using fuzzy intervals.With LPM,the performance of the air compressor,molecular sieve adsorber,turbo expander,main plate-fin heat exchangers,and packing column of a 100000 Nm3 O2/h large-scale ASU is enhanced to adapt to variable working conditions.The designed value of net power consumption per unit of oxygen production(kW/(Nm3 O2))is reduced by 6.45%. 展开更多
关键词 performance design air SEPARATION unit(ASU) lumped parameter model(LPM) VARIABLE working conditions T–S FUZZY INTERVAL detection
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INVESTIGATION ON EFFECT OF DRUG DOSING REGIMENTS ON DRUG DELIVERY IN SOLID TUMOR VIA LUMPED PARAMETER MODELING AND ANIMAL EXPERIMENTS
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作者 GAO Ci-xiu XU Shi-xiong +1 位作者 JIANG Yu-ping TU Jiang-long 《Journal of Hydrodynamics》 SCIE EI CSCD 2009年第1期20-25,共6页
This work aims to investigate the effects of dosing regiments on drug delivery in solid tumors and to validate them with experiments on rats. The lumped parameter models of pharmacokinetics and of drug delivery in tum... This work aims to investigate the effects of dosing regiments on drug delivery in solid tumors and to validate them with experiments on rats. The lumped parameter models of pharmacokinetics and of drug delivery in tumor were developed to simulate time courses of average drug concentration (Ct) of tumor interstitium in two types of dosing regiments (i.e., single-shot and triple-shot ones). The two regiments were performed via antitumor drug, hydroxycamptothecin (HCPT), on rats, to measure the drug concentration in the tumor. The simulations of the drug concentration in the tumor of the two dosing regiments were conducted and compared with the experimental data on rats. The coefficients in the models were investigated. It is concluded that the triple-shot method is more effective than that of single-shot injection. The present lumped-parameter model is quantitatively competent for drug delivery in solid tumor. 展开更多
关键词 solid tumor dosing regiments lumped parameter model experiment on rats
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集总与多体耦合人车模型的振动特性仿真 被引量:1
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作者 李敏 李丽君 孟德世 《山东理工大学学报(自然科学版)》 CAS 2024年第1期61-67,共7页
为了更好地分析车辆行驶时人体的振动情况以及更好地评价人体的动态舒适性,通过COMSOL软件建立了集总参数与多体耦合人-椅-车动力学模型。利用滤波白噪声法建立随机路面时域模型作为人车系统的振动输入,对不同路面等级和车速下的人体振... 为了更好地分析车辆行驶时人体的振动情况以及更好地评价人体的动态舒适性,通过COMSOL软件建立了集总参数与多体耦合人-椅-车动力学模型。利用滤波白噪声法建立随机路面时域模型作为人车系统的振动输入,对不同路面等级和车速下的人体振动响应进行时域和频域仿真分析。根据ISO 2631-1:1997(E)计算垂向和纵向人体头部以及臀部的加速度均方根值,以此来评价人体乘坐舒适性。研究结果表明,路面等级越低、车速越高,人体乘坐舒适性越差。提出的集总与多体耦合人-椅-车振动模型可以比较精确地计算出坐姿人体垂向、纵向的振动响应,有助于对车辆乘坐舒适性进行评价。 展开更多
关键词 --车动力学模型 耦合 集总参数 多体动力学 乘坐舒适性
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