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parametric modeling on spatial effect of excavation-damaged zone of underground cavern

Journal of Central South University 2013年第4期20卷 1085-1093页

作者：刘会波肖明陈俊涛 State Key Laboratory of Water Resources and Hydropower Engineering Science (Wuhan University) Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education (Wuhan University)

Regarding excavation-damaged zone （EDZ） around underground opening as non-homogeneous rockmass with spatial deterioration effect on stuffiness and strength, a parametric model of EDZ using radius-displacement-dependent deformation modulus （RDDM） was proposed. Considering the nonlinearity characteristic of deformation and locality otherness of surrounding rock, deterioration parameter field of deformation modulus of rockmass around opening was quantitatively calculated through a given function. Applicability for multi-cavern condition and parameter sensibility of the model was analyzed by numerical experiments using synthetic data. Furthermore, the model was applied to identify EDZ of underground caverns of Pubugou hydropower station by calculating deterioration parameter field. Based on the parametric analysis of spatial effect and geological investigation, it is recognized that large radial deformation of deep fractured rock at the spandrel position and insufficient supporting bolts mainly result in great deformation pressure to act on the shotcrete and cause partial crack and spalling. It is shown that deterioration parameter field along the longitudinal axis of main powerhouse is evidently non-homogeneous in space and distributes exponentially along the radius from the opening. The model provides a simple and convenient way to identify the EDZ in the working state for rapid construction feedback analysis and support optimization of underground cavem from quantitative point of view and also aids in interpreting monitoring displacements and estimating support requirements.

关键词： underground cavern excavation-damaged zone spatial effect parametric modeling deformation modulus

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parametric modeling of hypersonic ballistic data based on time varying auto-regressive model

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Science China(Technological Sciences) 2020年第8期63卷 1396-1405页

作者： HU YuDong LI JunLong ZHANG Zhao JING WuXing GAO ChangSheng Department of Aerospace Engineering Harbin Institute of TechnologyHarbin 150001China China Aerospace Science and Industry Corporation Beijing 100854China

For describing target motion in hypersonic vehicle defense,a parametric analyzing and modeling method on ballistic data is proposed based on time varying auto-regressive *** data are regarded as non-stationary random signal,where the hidden internal law is ***,ballistic data are decomposed into smooth linear trend signal and non-stationary periodic skip signal with ensemble empirical mode decomposition method to avoid mutual interference between different modal ***,the linear trend signal and the periodic skip signal are modeled *** linear trend signal is approximated by power function regressive estimator and the periodic skip signal is modeled based on time varying auto-regressive *** order to determine optimal model orders,a novel method is presented based on information theoretic criteria and the criteria of minimizing the mean absolute ***,the consistency test is conducted by investigating the time-frequency spectrum characteristics and statistical properties of outputs of the parametric model established above and dynamics model under the same initial *** results demonstrate that the parametric model established by the proposed method shares a high consistency with the original dynamics model.

关键词： hypersonic vehicle parametric modeling ballistic data decomposition time varying auto-regressive periods drift

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parametric modeling of Circuit Model for AC Glow Discharge in Air

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第4期35卷 710-718页

作者： Yu Bing Yuan Pei Shen Enyu Shu Wenjun Jiangsu Province Key Laboratory of Aerospace Power Systems College of Energy and Power EngineeringNanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China

In the parametric modeling of the circuit model for glow discharge in air,a new method for the design of glow discharge circuit model is *** new circuit model is an important reference for the design of plasma power supply,the simulation of glow discharge plasma actuator and the simulation of glow discharge plasma *** modeling approach consists in developing an electrical model of the glow discharge in air based on circuit *** structure of the circuit model is established according to the theoretical analysis and the experimental *** the parameters of the circuit model are obtained based on the circuit ***,the circuit model is verified by comparing the simulation current with the experimental *** model takes into account the whole framework of the air glow discharge including the sheath and the plasma *** built circuit model is feasible and reliable,thus being instructive for the investigation of the glow discharge in air.

关键词： parametric modeling glow discharge circuit model OrCAD

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parametric modeling OF COMPONENT LIBRARY FOR LANDING GEAR BASED ON CATIA/CAA

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Transactions of Nanjing University of Aeronautics and Astronautics 2013年第2期30卷 118-124页

作者：任杰聂宏魏小辉傅涌峰 College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

The design of landing gear is complicated due to the numerous considered *** the initial elements related to each other can also be influenced by different *** gear design often involves a very large variety of configurations,especially in the conceptual design ***,traditional method costs more time to complete the whole procedure for suitable configurations of landing ***,the parametric modeling of component library for landing gear based on computer aided three-dimensional interface application/component application architecutre(CATIA/CAA)is *** to the analysis of the characteristics of landing gear components,a method is presented to extract the primary parameters of landing gear components so that a systematic classification can be ***,the related theories and methods,including receiving geometrical parameters of the components and updating the parametrical model,displaying the component parts,are also ***,the development technology for component library is *** proposed modeling method can improve the efficiency of the whole design cycle for landing gear.

关键词： components of landing gear conceptual design phase parametric modeling systematic classification CATIA/CAA V5

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Dynamic parametric modeling-based model updating strategy of aeroengine casings

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Chinese Journal of Aeronautics 2021年第12期34卷 145-157页

作者： Chengwei FEI Haotian LIU Shaolin LI Huan LI Liqiang AN Cheng LU Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China School of Energy and Power Engineering Beihang UniversityBeijing 100083China Beijing Key Laboratory of Aero-Engine Structure and Strength Beijing 100083China Department of Mechanical Engineering North China Electric Power UniversityBaoding 071003China

For accurate Finite Element(FE)modeling for the structural dynamics of aeroengine casings,parametric modeling-based Model Updating Strategy(PM-MUS)is proposed based on efficient FE parametric modeling and model updating techniques regarding uncorrelated/correlated mode *** structure is parametrically modeled by simplifying initial structural FE model and equivalently simulating mechanical *** modes between FE model and experiment are reasonably handled by adopting an objective function to recognize correct correlated modes *** parametrized FE model is updated to effectively describe structural dynamic characteristics in respect of testing *** model updating technology is firstly validated by the detailed FE model updating of one fixed–fixed beam structure in light of correlated/uncorrelated mode shapes and measured mode *** PM-MUS is applied to the FE parametrized model updating of an aeroengine stator system(casings)which is constructed by the proposed parametric modeling *** revealed in this study,(A)the updated models by the proposed updating strategy and dynamic test data is accurate,and(B)the uncorrelated modes like close modes can be effectively handled and precisely identify the FE model mode associated the corresponding experimental mode,and(C)parametric modeling can enhance the dynamic modeling updating of complex structure in the accuracy of mode *** efforts of this study provide an efficient dynamic model updating strategy(PM-MUS)for aeroengine casings by parametric modeling and experimental test data regarding uncorrelated modes.

关键词： Aeroengine casings Correlated mode pair Model updating parametric modeling Structural dynamics Uncorrelated modes

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A fnite element parametric modeling technique of aircraft wing structures

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Chinese Journal of Aeronautics 2013年第5期26卷 1202-1210页

作者： Tang Jiapeng Xi Ping Zhang Baoyuan Hu Bifu School of Mechanical Engineering and Automation Beihang University School of Mechatronic Engineering North University of China

A finite element parametric modeling method of aircraft wing structures is proposed in this paper because of time-consuming characteristics of finite element analysis pre-processing. The main research is positioned during the preliminary design phase of aircraft structures. A knowledge- driven system of fast finite element modeling is built. Based on this method, employing a template parametric technique, knowledge including design methods, rules, and expert experience in the process of modeling is encapsulated and a finite element model is established automatically, which greatly improves the speed, accuracy, and standardization degree of modeling. Skeleton model, geometric mesh model, and finite element model including finite element mesh and property data are established on parametric description and automatic update. The outcomes of research show that the method settles a series of problems of parameter association and model update in the process of finite element modeling which establishes a key technical basis for finite element parametric analysis and optimization design.

关键词： Finite element model Geometric mesh model Knowledge parametric modeling Skeleton model Template Wing

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parametric modeling System for Cooling Turbine Blade Based on Feature Design

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Transactions of Nanjing University of Aeronautics and Astronautics 2020年第5期37卷 758-767页

作者： WANG Jie ZHAO Miaodong MAO Jianxing Aero Engine Academy of China Beijing 101300P.R.China School of Energy and Power Engineering Beihang UniversityBeijing 100191P.R.China Aero-engine Research Institute Beihang UniversityBeijing 100191P.R.China Beijing Key Laboratory of Aero-engine Structure and Strength Beijing 100191P.R.China

Based on feature modeling and mathematical analysis methods,a process-oriented and modular parametric design system for advanced turbine cooling blade is developed with UG API,aiming at the structural complexity and high design difficulty of aero-engine cooling turbine *** relationship between the external and internal body features,the body attached feature is analyzed as viewed from the feature and parameter *** parametric design processes and design examples of the external body shape,tenon,platform and internal body shape,ribs,pin fins are *** system improves the design efficiency of cooling turbine blade and establishes the foundation of multidisciplinary design optimization procedure for it.

关键词： parametric modeling cooling turbine blade UG API

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Research on parametric modeling and computing of multi-tower suspension bridge based on ANSYS

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Engineering Sciences 2012年第3期10卷 49-54页

作者： Feng Zhaoxiang Zhao An Song Jianyong Yang Yun Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department Taizhou Jiangsu 225321 China Research Institute of Highway Ministry of Transport Beijing 100088 China

Based on FEM (finite element method) program ANSYS and the OpenGL graphics, this paper develops the parametric modeling module and the computing module of the multi-tower suspension bridge, the modules being embedded into the ANSYS system, and the parametric modeling module parameters can be entered by way of interface, which can fast establish a multi-tower suspension bridge model. Calculation module can establish load conditions for the features of road bridge and specifications, in which multiple conditions can be defined and solved automatically. Post-processing part of the solution also serves the results of the subtotals and selects the output, so that the results of the output and finishing work have become more convenient and easier, and also the results can be saved in word, excel and other different file types.

关键词： ANSYS suspension bridge parametric modeling computing

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Set-based parametric modeling, buckling and ultimate strength estimation of stiffened ship structures

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Journal of Central South University 2019年第7期26卷 1958-1975页

作者： LI Yi-bo PAN Qing HUANG Ming-hui LI Lu State Key Laboratory of High Performance Complex Manufacturing Central South University Changsha 410083 China School of Mechanical and Electrical Engineering Central South University Changsha 410083 China School of Software Central South University Changsha 410083 China

There have been a great demand for a suitable and convenient method in the field of buckling analysis of stiffened ship structures, which is essential to structural safety assessment and is significantly time-consuming. modeling, buckling behaviors and ultimate strength prediction of stiffened panels were investigated. The modeling specification including nonlinear finite element model and imperfections generation, and post-buckling analysis procedure of stiffened plates were demonstrated. And a software tool using set-based finite element method was developed and executed in the MSC. Marc environment. Different types of stiffen panels of marine structures have been employed to investigate the buckling behavior and assess the validity in the estimation of ultimate strength. A comparison between results of the generally accepted methods, experiments and the software tool developed was demonstrated. It is shown that the software tool can predict the ultimate capacity of stiffened panels with imperfections with a good accuracy.

关键词： buckling ultimate strength stiffened plates parametric modeling ship structure

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维普期刊数据库

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parametric modeling and Simulation of Orthogonal Milling Process Based Finite Element Method

Parametric Modeling and Simulation of Orthogonal Milling Pro...

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第二届国际数字制造论坛

作者： Sheng Jing~1,Yao Li-ping~2 (1.Dpt.of Mechanical Engineering,HuBei Automotive Industries Institute,Hubei Shiyan 442002,China 2.Dpt.of Foreign Languages,HuBei Automotive Industries Institute,Hubei Shiyan 442002,China)

＜正＞The key techniques of 2D modeling with *** software and the whole modeling procedure of metal oblique cutting process was *** rule based on the modeling process was *** finite element simulation of metal machining is a complex *** is essential to exploit a system to construct a model of simulation so as to obtain simulation data more conveniently and *** research is significant for the development of parametric *** system’ s interface,designed using C++ Builder,can access data which includes the geometrical angles and dimensions of tool,the sizes of work,the relative position between tool and work,properties of tool and work,cutting conditions,*** procedure file that is able to model in the *** environment automatically is generated by the *** parametrical modeling of simulation is completed by the system which calls the procedure ***,case studies were performed to study simulation model,interface and *** the parametric modeling is a kind of effective avenue for metal machining process simulation.

关键词： Orthogonal milling machining parametric modeling FEA Interface design

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