检索结果-内蒙古大学图书馆

Bio-inspired Filter design Based on Vortex Control Mechanism of Parallel Groove Structure

Journal of Bionic Engineering 2023年第1期20卷 338-348页

作者： Yawei Zhu Dean Hu Yonggang Guo Hao Ding Gang Yang School of Mechanical and Electrical Engineering Henan University of TechnologyZhengzhou450001China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipments Ministry of EducationHunan UniversityChangsha410082China

Solid–liquid separation is widely used in daily life and practical *** industrial filters are prone to clogging,but this rarely occurs in filter-feeding *** by the filter feeding mechanism of balaenid whales and considering the local grooves in the fringes layer,a new bionic filter is produced by 3D printing technology through the bionic design of the parallel channels inside the mouth of balaenid *** the same time,a test platform composed of the bionic filter,peristaltic pump,fluid pulse rectifier and water tank is built to carry out the fluid flow pattern dyeing and particle filtration *** is found that fluid separation occurs near the groove structure and local vortices are *** vortex control filtration mechanism makes the particles in the front grooves tend to accumulate on the left side,which has a certain anti-clogging ***,the increase of flow velocity leads to the enhancement of vortices,which makes the accumulation effect on the left more *** study initially practices the bionic application from biological model to engineering design,and the vortex control anti-clogging filtration mechanism proposed in the study has a wide range of application prospects and values.

关键词： Solid-liquid separation Balaenid whales Filter feeding-Bionic design Anti-clogging filtration mechanism

来源：评论

学校读者我要写书评

暂无评论

Experimental investigation of a two-degree-of-freedom vibro-impact system

Experimental investigation of a two-degree-of-freedom vibro-...

引用

作者： Wen, Guilin Xu, Huidong Xiao, Lu Xie, Xiaoping Chen, Zhong Wu, Xin State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment MoE Hunan University Changsha Hunan 410082 China

Vibro-impact systems with intermittent contacts are strongly nonlinear. The discontinuity of impact can give rise to rich nonlinear dynamic behaviors and bring forth challenges in the modeling and analysis of this type of nonsmooth systems. The dynamical behavior of a two-degree-of-freedom vibro-impact system is investigated experimentally in this paper. The experimental apparatus is composed of two spring-linked oscillators moving on a lead rail. One of the two oscillators connected to an excitation system intermittently impacts with a spherical obstacle fixed on the thick steel wall. With different gap sizes between the impacting oscillator and the obstacle, the dynamical behaviors are investigated by changing the excitation frequencies. The experimental results show periodic, grazing and chaotic dynamical behaviors of the vibro-impact system. © 2012 World Scientific Publishing Company.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

A bionic concentric honeycomb with synergetic enhancement mechanism

引用

Thin-Walled Structures 2025年 214卷

作者： Wang, Yihao Ren, Yiru Jiang, Hongyong State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Hunan Changsha410082 China College of Mechanical and Vehicle Engineering Hunan University Hunan Changsha410082 China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of Education Hunan University Hunan Changsha410082 China School of Mechanical Engineering and Electronic Information China University of Geosciences Hubei Wuhan430074 China

Inspired by the ‘concentric walls’ in the microstructure of coconut trees, a novel concentric honeycomb is proposed to improve energy absorption. A connected configuration (Double cell) and a gradient arrangement strategy (Triple cell) are introduced in the conventional honeycomb. All structures are prepared by 3D printing and their compression and impact properties are investigated experimentally and simulated. Multiple failure modes under different loads are revealed. Compared with traditional honeycomb, the energy absorption values of C-II-T and C-II-T+L are 183 % and 152 % higher, and the specific energy absorption values are 57 % and 43 % higher, respectively. The energy absorption and specific energy absorption values of G-III-3 are 193 % and 71 % higher, respectively. Synergistic deformation is still effective in improving energy dissipation by more than one-third between concentric honeycombs (C-II-T vs. C-II-L). The results indicate that the synergistic deformation mechanism can effectively exert the enhancement effect of concentric honeycomb. It represents a synergistic enhancement mechanism rather than individual deformation. Furthermore, a controllable mechanical response law of the concentric honeycomb is established to achieve a controllable design. This novel conceptual and structural design approach provides insights into the controllable mechanical design of honeycombs. © 2025 Elsevier Ltd

关键词： Honeycomb structures

来源：评论

学校读者我要写书评

暂无评论

design,Characterization and Optimization of Multi-directional Bending Pneumatic Artificial Muscles

引用

Journal of Bionic Engineering 2021年第6期18卷 1358-1368页

作者： Wei Xiao Dean Hu Weixiong Chen Gang Yang Xu Han State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082People’s Republic of China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha410082People’s Republic of China School of Mechanical Engineering Hebei University of TechnologyTianjin300401People’s Republic of China

Bending Pneumatic Artificial Muscles(PAMs)are particularly attractive and extensively applied to the soft grasper,snake-like robot,*** extend the application of PAMs,we fabricate a Multi-directional Bending Pneumatic Artificial Muscle(MBPAM)that can bend in eight directions by changing the pressurized *** maximum bending angle and output force are 151°and 0.643 N under the pressure of 100 kPa,***,the Finite Element Model(FEM)is established to further investigate the *** experimental and numerical results demonstrate the nonlinear relationship between the pressure and the bending angle and output ***,the effects of parameters on the performance are studied with the validated *** results reveal that the amplitude of waves and the thickness of the base layer can be ***,multi-objective optimization is performed to improve the bending performance of the *** optimization results indicate that the output force can be increased by 7.8%with the identical bending angle of the initial design,while the bending angle can be improved by 8.6%with the same output ***,the grasp tests demonstrate the grip capability of the soft four-finger gripper and display the application prospect of the MBPAM in soft robots.

关键词： Pneumatic artificial muscle Multi-directional bending Soft robots Parameter optimization

来源：评论

学校读者我要写书评

暂无评论

Remaining Useful Life Estimation of Mechanical Systems Based on the Data-driven Method and Bayesian Theory

引用

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2018年第12期54卷 115-124页

作者： Zhao, Shenkun Jiang, Chao Long, Xiangyun Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment of Ministry of Education Hunan University Changsha410082 China

A novel remaining useful life(RUL) estimation method is proposed based on the data-driven method and Bayesian theory for the remaining useful life estimation of complex mechanical systems. Firstly, the condition monitoring data of same or similar systems are fused to form the Health Index indicating the degradation degree of systems and the state model by the data-driven method. Then, a Bayesian model of the state model parameters is built on Bayesian theory. With the on-line condition monitoring data of system to be estimated and the Bayesian model, the model parameters are updated by Markov Chain Monte Carlo (MCMC) and the RUL of system is estimated. At last, a turbofan engine case is used to show the effectiveness of the present method. © 2018 Journal of Mechanical Engineering.

关键词： Turbofan engines

来源：评论

学校读者我要写书评

暂无评论

Topology optimization on the structure of articulated rhombus concept chassis

引用

Qiche Gongcheng/Automotive Engineering 2012年第7期34卷 638-642页

作者： Chen, Zhewu Jin, Qiutan Wen, Guilin Qing, Qixiang Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body The Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment of MoE Changsha 410082 China

According to the requirements on the layout of all assemblies and practical driving, a basic structure model for the articulated rhombus concept chassis is set up by using basic structure method. With minimizing the mass as objective, the stiffness and strength of all structural components, including side rails and cross members under various typical loading conditions as constraints, and the position and section size of all components as design variables, a topology optimization on the structure of articulated rhombus concept chassis is conducted. Finally the results of tests verify the effectiveness of the topology optimization scheme used.

关键词： Chassis

来源：评论

学校读者我要写书评

暂无评论

Crashworthiness optimization design of honeycombs based on the simplified basic folding element method

引用

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2011年第16期47卷 93-100页

作者： Yin, Hanfeng Wen, Guilin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha 410082 China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Hunan University Changsha 410082 China

The mean crushing stresses of three kinds of commonly used honeycombs are calculated by using the simplified basic folding element (SBFE) method, which is actually the super folding element (SFE) theory based on the simplified basic folding element. In order to validate these theoretical solutions, the axial crushing simulation of the said honeycombs is implemented by employing the nonlinear finite element method through LS-DYNA. The analytical solutions show excellent agreement with these simulation results. Based on the theoretical solutions of the mean crushing stress, the crashworthiness of the pre-crushed honeycombs is multioptimized by using the multiobjective particle swarm optimization (MOPSO) algorithm. It is found that the energy absorption capacity of regular hexagonal honeycomb is the most excellent among those of the said honeycombs. Finally, three optimized honeycomb structures under axial dynamic loading are simulated by using LS-DYNA. The numerical simulation results correlate with the analytical results obtained by our crashworthiness optimization very well. This indicates that the crashworthiness optimization of honeycombs based on our deviational theoretical expressions is feasible and effective. © 2011 Journal of Mechanical Engineering.

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

Multi-objective optimization design of omni-directional multi-chamber airbag for landing on Mars

引用

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2015年第15期51卷 135-141页

作者： Wen, Guilin Xiao, Jiuru Yin, Hanfeng Liu, Zhibo Qing, Qixiang The MOE Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Hunan University Changsha410082 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China

Subject to the limitations of the traditional design method based on the experiments on the earth to solve the problem of the optimization design for omni-directional multi-chamber airbag for landing on Mars, a systemic methodology by jointly integrating the finite element simulation, experiment and multi-objective optimization method is used to optimize the airbag system. In the process of the optimization design, the finite element model which can simulate the landing process of the omni-directional multi-chamber airbag with the wrapped Mars lander is built. And then the impact physical experiments on the earth are implemented to validate the accuracy of the finite element model. Based on the results of finite element simulations, some polynomial metamodels of the objective function are obtained. According to these models, the airbag system is optimized by adopting multi-objective genetic optimization algorithm, and the optimized results show the obvious improvements of the lightweight and the specific energy absorption (SEA). The proposed method has a great significance for the design of omni-directional multi-chamber airbag for landing on Mars or other similar equipment. ©, 2015, Journal of Mechanical Engineering. All right reserved.

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

Multi-objective crashworthiness optimization design of foam-filled sandwich wall multi-cell structures

引用

Zhendong yu Chongji/Journal of Vibration and Shock 2015年第5期34卷 115-121页

作者： Wen, Gui-Lin Kong, Xiang-Zheng Yin, Han-Feng Xiao, Jiu-Ru State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China The MOE Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Hunan University Changsha410082 China

Foam-filled tubes gain more and more attention due to their excellent energy absorption capacity. According to the study of luffa structures, a kind of foam-filled sandwich wall multi-cell structures similar to the luffa cross-section was proposed. By using the nonlinear finite element code LS-DYNA, the axial crushing finite element model of the foam-filled sandwich wall multi-cell structure was established. Based on the polynomial surrogate model, the structures with different sizes were optimized by adopting multiobjective particle swarm optimization algorithm. According to the result of optimization, suggestions for the choice of reasonable structures were given to make the selected structure have the best energy absorption characteristics under the peak force constraint. The new type of structures proposed here had a good application prospect in vehicle, aerospace and other fields. ©, 2015, Chinese Vibration Engineering Society. All right reserved.

关键词： Crashworthiness

来源：评论

学校读者我要写书评

暂无评论

design and analysis of a vertically taking off and landing amphibian vehicle with duct fan

Design and analysis of a vertically taking off and landing a...

引用

International Conference on Electric Information and Control Engineering

作者： Wen, Guilin Chen, Zhewu Wang, Yanguang Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha China

ISBN: (纸本)9781424480395

The design principle, aviation mechanics and stability of a vertical take-off and landing vehicle is investigated in this paper. Based on these flight parameters, structural and dynamic parameters are determined. With aids of the methods of kinematics, aerodynamic and dynamic analysis, the theoretical lift provided by this ducted lift propellers and thrust produced by forward ducted propeller are studied. The lift characteristic of ducted propeller systems, the performance of grid and the controllable stability are obtained by numerical simulation. The analysis results imply that the feasibility of this type of aviation vehicle sounds in reason. © 2011 IEEE.

关键词： Ducts

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：