检索结果-南通市图书馆

Key Techniques and Applications of Adaptive Growth Method for Stiffener Layout Design of Plates and Shells

Chinese Journal of Mechanical Engineering 2013年第6期26卷 1138-1148页

作者： ding xiaohong JI Xuerong MA Man HOU Jianyun School of Mechanical Engineering University of Shanghai for Science and Technology Pan Asia Technical Automotive Center Co. Ltd.

The application of the adaptive growth method is limited because several key techniques during the design process need manual intervention of designers. Key techniques of the method including the ground structure construction and seed selection are studied, so as to make it possible to improve the effectiveness and applicability of the adaptive growth method in stiffener layout design optimization of plates and shells. Three schemes of ground structures, which are comprised by different shell elements and beam elements, are proposed. It is found that the main stiffener layouts resulted from different ground structures are almost the same, but the ground structure comprised by 8-nodes shell elements and both 3-nodes and 2-nodes beam elements can result in clearest stiffener layout, and has good adaptability and low computational cost. An automatic seed selection approach is proposed, which is based on such selection rules that the seeds should be positioned on where the structural strain energy is great for the minimum compliance problem, and satisfy the dispersancy requirement. The adaptive growth method with the suggested key techniques is integrated into an ANSYS-based program, which provides a design tool for the stiffener layout design optimization of plates and shells. Typical design examples, including plate and shell structures to achieve minimum compliance and maximum bulking stability are illustrated. In addition, as a practical mechanical structural design example, the stiffener layout of an inlet structure for a large-scale electrostatic precipitator is also demonstrated. The design results show that the adaptive growth method integrated with the suggested key techniques can effectively and flexibly deal with stiffener layout design problem for plates and shells with complex geometrical shape and loading conditions to achieve various design objectives, thus it provides a new solution method for engineering structural topology design optimization.

关键词： adaptive growth method stiffener layout design plates and shells growth mechanism natural branch system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Layout Design of Conductive Heat Channel by Emulating Natural Branch Systems

引用

Journal of Bionic Engineering 2018年第3期15卷 567-578页

作者： Yidong Ji xiaohong ding Hao Li Min Xiong School of Mechanical engineering University of Shanghai for Science and Technology Shanghai 200093 China

To design effective and easy-to-manufacture conductive heat channels, a heuristic method by emulating the natural branch systems is suggested. The design process of the method is divided into two steps, which are the principal channel design and the lateral channel design. During the process, the width of each channel is controlled by the bifurcation law, and the end point of the channel is located at the point with the maximum temperature while the start points of the principal channel and the lateral channel are respectively determined by the location of the heat sink and the law of the minimum thermal resistance. Four design examples with different boundary conditions are studied by the suggested method, and the design results are compared with that of the traditional structural topology optimization method. Not only lower maximum temperature and relatively uniform distribution of temperature are obtained by the suggested method, but also straight channels are achieved without gray element, which is easy to manufacture. The suggested method inspired by the natural branch systems can provide an effective solution for heat channel design in the heat dissipation structures.

关键词： conductive heat channel bionic layout design natural branch system thermal resistance bifurcation law

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Polyimide/titanium dioxide self-cleaning nano-hybrid films with high photocatalytic properties

引用

Progress in Natural Science:Materials International 2023年第5期33卷 674-680页

作者： Ruilai Liu Chang Lu xiaohong ding Yunchi Cai Song Liang College of Ecological and Resources Engineering Wuyi University College of Chemistry and Materials Science Fujian Normal University Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Self-cleaning films are considered an emerging paradigm of environmentally functional *** the photocatalytic activities of self-cleaning film is a viable strategy for improving its antifouling *** this work,a polyimide/titanium dioxide(TiO2) film(PI/TiO2) film was developed by casting a mixture of polyamic acid solution and TiO2hydrosol with a subsequent thermal ***2with a concentration of 1,3,and 5 wt% was successfully incorporated into the PI matrix and was equally distributed in nanometer size in the PI/TiO2nano-hybrid *** addition of TiO2into the film significantly improved its catalytic performance as indicated by the photocatalytic degradation of methylene blue and resazurin solution,suggesting a good selfcleaning property for antifouling *** addition,the thermal and mechanical stability of the PI film were improved with the addition of *** eight cycles,the PI-TiO2films also demonstrated excellent cycling *** study introduces a novel self-cleaning film family composed of PI/TiO2nano-hybrid film and emphasizes the engineering potential of photocatalytic materials in the context of self-cleaning film.

关键词： Polyimide Nano-TiO2 Self-cleaning film Photocatalysis Environmental functional materials

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Geometry and size optimization of stiffener layout for three-dimensional box structures with maximization of natural frequencies

引用

Chinese Journal of Aeronautics 2023年第1期36卷 324-341页

作者： Tiannan HU xiaohong ding Heng ZHANG Lei SHEN Hao LI School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Mechanical Engineering and Science Kyoto UniversityKyoto 615-8540Japan

Based on the growth mechanism of natural biological branching systems and inspiration from the morphology of plant root tips,a bionic design method called Improved Adaptive Growth Method(IAGM)has been proposed in the authors’previous research and successfully applied to the reinforcement optimization of three-dimensional box structures with respect to natural ***,as a kind of ground structure methods,the final layout patterns of stiffeners obtained by using the IAGM are highly subjected to their ground structures,which restricts the optimization effect and freedom to further improve the dynamic performance of *** solve this problem,a novel post-processing geometry and size optimization approach is proposed in this *** method takes the former layout optimization result as start,and iteratively finds the optimal layout angles,locations,and lengths of stiffeners with a few design variables by optimizing the positions of some specific node lines called active node *** the same time,thick-nesses of stiffeners are also optimized to further improve natural frequencies of three-dimensional box *** this method,stiffeners can be successfully separated from their ground structures and further effectively improve natural frequencies of three-dimensional box structures with less material *** numerical examples are illustrated to validate the effectiveness and advantages of the suggested method.

关键词： Box structure Geometry optimization Improved adaptive growth method Maximum natural frequency design Stiffener layout

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simultaneous optimization of structure together with attached tuned mass dampers considering dynamic performance

引用

Chinese Journal of Aeronautics 2022年第2期35卷 128-140页

作者： Lei SHEN xiaohong ding Tiannan HU Min XIONG Heng ZHANG School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Tuned Mass Dampers(TMDs)are often attached to a main structure to reduce vibration,and the TMDs’positions are important to affect the structural dynamic ***,the TMDs’positions and the material layout of the structure act on each *** paper suggests a design optimization method by combining the topology optimization of the main structure and the layout of the attached TMDs under harmonic *** main structure with the attached TMDs are modeled by the continuum FEA method to consider the change of TMDs’*** they are optimized simultaneously by introducing a multi-level optimization frame,which includes the structural topology optimization and the optimal tuning of *** locations and damping parameters of TMDs are optimized in every step of the SIMP-based topology optimization of the main structure,so as to fully consider the interactions between each other to improve the dynamic *** examples of cantilever structures are studied,and the results show that when the main structure and TMDs are optimized simultaneously,the modal strain energy is more concentrated compared with that obtained by the non-simultaneous optimization ***,the dynamic compliance of the target mode is dramatically reduced.

关键词： Dynamic performance Harmonic excitation Topology optimization Tuned mass damper Tuning optimization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A human-sensitive frequency band vibration isolator for heavy-duty truck seats

引用

Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1733-1748页

作者： Qingqing LIU Shenlong WANG Ge YAN Hu ding Haihua WANG Qiang SHI xiaohong ding Huijie YU School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Frontier Science Center of MechnoinformaticsShanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Yanfeng Adient Seating Co. Ltd.Shanghai 201315China College of Mechanical and Electrical Engineering Jiaxing Nanhu UniversityJiaxing 314001Zhejiang ProvinceChina

In this study,a human-sensitive frequency band vibration isolator(HFBVI)with quasi-zero stiffness(QZS)characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven ***,the analytical expressions for the force and displacement of the HFBVI are derived with the Lagrange equation and d'Alembert's principle,and are validated through the prototype restoring force ***,the harmonic balance method(HBM)is used to obtain the dynamic responses under harmonic excitation,and further the influence of pre-stretching on the dynamic characteristics and transmissibility is ***,the experimental prototype of the HFBVI is fabricated,and vibration experiments are conducted under harmonic excitation to verify the vibration isolation performance(VIP)of the proposed vibration *** experimental results indicate that the HFBVI can effectively suppress the frequency band(4-8 Hz)to which the human body is sensitive to vertical *** addition,under real random road spectrum excitation,the HFBVI can achieve low-frequency vibration isolation close to 2 Hz,providing new prospects for ensuring the health of heavy-duty truck drivers.

关键词： human-sensitive frequency band quasi-zero stiffness(QZS) heavy-duty truck seat real random road spectrum low-frequency vibration isolation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Brief Analysis of Energy Conservation Ways by Building Materials for Ecological Architecture

引用

Journal of Power and Energy Engineering 2020年第12期8卷 13-22页

作者： xiaohong ding School of Architectural Engineering Huaiyin Institute of Technology Huai’an China

The development of society and economy in China is bringing growth to all industries. In particular, the development of China’s building industry has attracted much attention. Building materials are an important part of and widely used in the building industry. Energy conservation by building materials has become an inevitable way of sustainable development. Centering on the building industry, this paper mainly discusses in detail the energy conservation ways by ecological architecture and building materials.

关键词： Ecological Architecture Sustainable Development Building Materials Energy Conservation by Building Materials

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development of Medical Informatization in the Era of Big Data

引用

Journal of Electronic Research and Application 2023年第5期7卷 14-23页

作者： Yong ding Xiujun Cai Xiaoyan Pang Jinming Ye xiaohong ding Sir Run Run Shaw Hospital Zhejiang University School of MedicineHangzhou 310016China

The purpose of this paper is to discuss the development of medical informatization in the era of big *** literature review and theoretical analysis,the development of medical informatization in the era of big data is deeply *** results show that medical informatization has developed rapidly in the era of big data,and its role in clinical decision-making,scientific research,teaching,and management has become increasingly *** development of medical informatization in the era of big data has important purposes and methods,which can produce important results and conclusions and provide strong support for the development of the medical field.

关键词： Electronic medical record system Digitization of medical images Clinical decision support system

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

动载荷激励下板壳结构加筋自适应成长方法

引用

振动与冲击 2020年第14期39卷 194-200页

作者：董小虎丁晓红上海理工大学机械工程学院上海200093

自适应成长法是基于自然界分支系统形态形成机理的一种高效结构拓扑优化设计方法。通过引入等效静态载荷法理论,运用自适应成长法解决板壳加筋结构在承受动载荷激励下的动态响应拓扑优化设计问题。根据板壳结构所受的动载荷边界条件,构... 详细信息

自适应成长法是基于自然界分支系统形态形成机理的一种高效结构拓扑优化设计方法。通过引入等效静态载荷法理论,运用自适应成长法解决板壳加筋结构在承受动载荷激励下的动态响应拓扑优化设计问题。根据板壳结构所受的动载荷边界条件,构建以动柔度为目标的优化数学模型,推导迭代公式,使板壳结构的加强筋从"种子"开始,沿着使结构最佳力学性能方向成长,从而形成最优加强筋分布形态。研究在简谐载荷和冲击载荷作用下的板壳结构加强筋设计例,并与静态载荷作用下的设计结果进行比较。研究结果表明,板壳结构在动态载荷作用下,其主加强筋布局形态和在静态载荷作用下相同,但在靠近载荷作用点附近出现与主加强筋平行的截面积较小的加强筋,以增加抵抗动态载荷的作用;而冲击载荷作用下的加强筋与一般简谐载荷作用下的加强筋相比,多出一层较复杂的框型筋板抵抗瞬时冲击力。

关键词：动载荷自适应成长法(AGM) 加强筋分布板壳结构动态响应

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

热管滚珠丝杠热性能仿真和实验

引用

中国机械工程 2020年第20期31卷 2445-2453页

作者：胡冕丁晓红上海理工大学机械工程学院上海200093

针对传统液冷散热滚珠丝杠存在的丝杠表面温度梯度及温度波动性较大、达到热平衡时间较长等问题,设计了内置热管的新型滚珠丝杠。选择热管丝杠充液介质并计算其结构尺寸参数;为验证热管丝杠热性能,提出了含管壁层、冷凝回流层、蒸气腔... 详细信息

针对传统液冷散热滚珠丝杠存在的丝杠表面温度梯度及温度波动性较大、达到热平衡时间较长等问题,设计了内置热管的新型滚珠丝杠。选择热管丝杠充液介质并计算其结构尺寸参数;为验证热管丝杠热性能,提出了含管壁层、冷凝回流层、蒸气腔层的热管丝杠分层等效模型并对其进行仿真;分析螺母位于不同位置时丝杠表面的温度分布,并与传统液冷丝杠散热性能进行对比分析;采用沸腾排气法制备热管丝杠,搭建实验台,测试热管丝杠表面温度并与仿真结果进行对比。研究结果表明,相对传统的液冷散热丝杠,热管丝杠表面具有较小的温度梯度,温度均匀性良好,且达到热平衡的时间短,仿真与实验结果一致,验证了仿真方法的有效性。

关键词：热管滚珠丝杠均温性能数值模拟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：