Web Layout Design of Large Cavity Structures Based on Topology Optimization

Large cavity structures are widely employed in aerospace engineering, such as thin-walled cylinders, blades andwings. Enhancing performance of aerial vehicles while reducing manufacturing costs and fuel consumptionhas become a focal point for contemporary researchers. Therefore, this paper aims to investigate the topologyoptimization of large cavity structures as a means to enhance their performance, safety, and efficiency. By usingthe variable density method, lightweight design is achieved without compromising structural strength. Theoptimization model considers both concentrated and distributed loads, and utilizes techniques like sensitivityfiltering and projection to obtain a robust optimized configuration. The mechanical properties are checked bycomparing the stress distribution and displacement of the unoptimized and optimized structures under the sameload. The results confirm that the optimized structures exhibit improved mechanical properties, thus offering keyinsights for engineering lightweight, high-strength large cavity structures.

Layout design and application of 4D-printing bio-inspired structures with programmable actuators

Four-dimensional(4D)printing is an advanced form of three-dimensional(3D)printing with controllable and programmable shape transformation over time.Actuators are used as a controlling factor with multi-stage shape recovery,with emerging opportunities to customize the mechanical properties of bio-inspired structures.The print pattern of shape memory polymer(SMP)fbers strongly afects the achievable resolution,and consequently infuences several other physical and mechanical properties of fabricated actuators.However,the deformations of bio-inspired structures due to actuator layout are more complex because of the presence of the coupling of multi-directional strain.In this study,the initial structure was designed from closed-shell behavior and divided into a general unit and actuator unit,the latter responsible for driving the transformation.Mutual stress confrontation between the actuator and the general unit was considered in the layout thermodynamic model,in order to eliminate the transformation produced by the uncontrolled shape memory behavior of the general unit.Three critical and efective strategies for the layout design of actuators were proposed and then applied to achieve the desired accurate deformation of 3D-printed bilayer structures.Finally,the proposed approach was validated and adopted for fabricating a complex shell-like gripper structure.

A review of cable layout design and assembly simulation in virtual environments

The layout and assembly of flexible cables play important roles in the design and development of complex electromechanical products.The rationality of cable layout design and the reliability of cable assembly greatly affect product quality.In this paper,we review the methods of cable layout design,cable assembly process planning,and cable assembly simulation.We first review research on flexible cable layout design(both interactive and automatic).Then,research on the cable assembly process planning,including cable assembly path and manipulation planning,is reviewed.Finally,cable assembly simulation is introduced,which includes general cable information,cable collision detection data,and cable assembly process modeling.Current problems and future research directions are summarized at the end of the paper.

INTEGRATION OF CELL FORMATION AND LAYOUT DESIGN IN THE UNIDIRECTIONAL LOOP MATERIAL HANDLING ENVIRONMENT

A two-phase approach is proposed to deal with the integration problem in the loop layout.Tabu search is applied to cell construction in phase 1 to minimize the inter-cell flow, and the heuristic for layout design is used as phase 2 to optimize the sum ofintra-cell and inter-cell transportation cost.The final computational results demonstrate the validation of the two-phase approach.

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

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.

INTEGRATED LAYOUT DESIGN OF CELLS AND FLOW PATHS

The integrated layout problem in manufacturing systems is investigated. An integrated model for concurrent layout design of cells and flow paths is formulated. A hybrid approach combined an enhanced branch-and-bound algorithm with a simulated annealing scheme is proposed to solve this problem. The integrated layout method is applied to re-layout the gear pump shop of a medium-size manufacturer of hydraulic pieces. Results show that the proposed layout method can concurrently provide good solutions of the cell layouts and the flow path layouts.

Humanized Spatial Layout Design of Cultural Plaza

From the perspective of humanized design concepts, humanized space design and behavioral psychological needs of users were re-interpreted and analyzed, basic elements and design principles of cultural plaza spatial layout were proposed. Particularly, application and role of humanized design in the spatial layout of cultural plaza was analyzed, on the basis of which humanized design objective and orientation for the sustainable development of cultural plaza was defined.

Layout Design-Based Research on Optimization and Assessment Method for Shipbuilding Workshop

研究学习建议检验一个三维的可视化节目，在改进通过一个布局的优化的基因算法上强调基于设计的标准和分离造船专题讨论会。由利用作为一个例子处理专题讨论会的钢，最小的逻辑费用的原则将被实现获得一个思想上的设备布局，和一个数学模型。客观性是最小化全部的必要距离在机器之间旅行了。一个改进控制操作符被实现改进基因算法的反复的效率，并且产出相关参数。计算机帮助了三度空间的接口申请(CATIA ) 软件被使用建立生产资源库和处理车间的钢的参量的模型。基于结果优化了平面后勤，处理车间的钢的一个视觉参量的模型被构造，并且质、量的调整然后被用于模型。为评估布局的结果的方法随后通过 AHP 的利用被建立。以便提供 digitalized 生产车间的优化和布局的参考的一个模式，优化分离生产车间将拥有实际意义的某个水平。

Layout design of thin-walled structures with lattices and stiffeners using multi-material topology optimization

In this paper,the thin-walled structures with lattices and stiffeners manufactured by additive manufacturing are investigated.A design method based on the multi-material topology optimization is proposed for the simultaneous layout optimization of the lattices and stiffeners in thin-walled structures.First,the representative lattice units of the selected lattices are equivalent to the virtual homogeneous materials whose effective elastic matrixes are achieved by the energy-based homogenization method.Meanwhile,the stiffeners are modelled using the solid material.Subsequently,the multi-material topology optimization formulation is established for both the virtual homogeneous materials and solid material to minimize the structural compliance under mass constraint.Thus,the optimal layout of both the lattices and stiffeners could be simultaneously attained by the optimization procedure.Two applications,the aircraft panel structure and the equipment mounting plate,are dealt with to demonstrate the detailed design procedure and reveal the effect of the proposed method.According to numerical comparisons and experimental results,the thin-walled structures with lattices and stiffeners have significant advantages over the traditional stiffened thin-walled structures and lattice sandwich structures in terms of static,dynamic and anti-instability performance.

Legends of the dashboard: an empirical evaluation of split and joint layout designs for geovisual analytics interfaces

Geodashboards are often designed with explanatory elements guiding users.These elements(e.g.legends or annotations)need to be carefully designed to mitigate split attention or information integration issues.In this paper,we report expert interviews followed by a controlled experiment where we compare two interface designs with a focus on the split attention effect:(1)a multiple-legend layout with explanatory elements located next to each view,and(2)a single-legend layout with all explanatory elements gathered in one place.Different legend layouts did not affect the performance,but affected user satisfaction.75%of the participants preferred the multiple-legend layout,and rated it with a higher usability score,mainly attributing this preference to the proximity of legend elements to the view of interest.Eye tracking data strongly and clearly verifies that participants indeed make use of the proximity:With the single-legend,the majority of eye-movement transitions were between the single-legend and the closest view to the legend,whereas with multiple-legend participants have shorter and more frequent legend visits,as well as more transitions between legends and views.Taken together,the design lesson we learned from this experiment can be summarized as‘split the legend elements,but make it close to the explained elements’.

Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration

Green manufacturing is a growing trend,and an effective layout design method for production lines can reduce resource wastage in processing.This study focuses on existing problems such as low equipment utilization,long standby time,and low logistics efficiency in a mixed-flow parallel production line.To reduce the energy consumption,a novel method considering an independent buffer configuration and idle energy consumption analysis is proposed for this production line’s layout design.A logistics intensity model and a machine tool availability model are established to investigate the influences of independent buffer area configuration on the logistics intensity and machine tool availability.To solve the coupling problem between machine tools in such production lines,a decoupling strategy for the relationship between machine tool processing rates is explored.An energy consumption model for the machine tools,based on an optimized configuration of independent buffers,is proposed.This model can effectively reduce the idle energy consumption of the machine tools while designing the workshop layout.Subsequently,considering the problems encountered in workshop production,a comprehensive optimization model for the mixed-flow production line is developed.To verify the effectiveness of the mathematical model,it is applied to an aviation cabin production line.The results indicate that it can effectively solve the layout problem of mixed-flow parallel production lines and reduce the idle energy consumption of machine tools during production.The proposed buffer configuration and layout design method can serve as a theoretical and practical reference for the layout design of mixed-flow parallel production lines.

CONCURRENT PRODUCTION ENGINEERING SYSTEM FOR BUFFER SIZE AND FLEXIBLE TRANSFER LINE LAYOUT DESIGN

在这篇论文，我们建议一个并发的生产工程系统(处理) 为灵活转移线(FTL ) 在一个限制区域的布局设计。处理第一在 FTL 在每台机床的海湾前面决定缓冲区尺寸然后初始化一台计算机在一个限制区域拉 FTL 的帮助设计(CAD ) 系统。我们开发集成于一个单个框架的一套模块系统，根据并发的工程的实践。并发的工程包含这些活动的合作。它期望了发展处理能改进在生产工程师的家之间的合作和植物设计者。这能被启用做生产工程师将更好使决定考虑成为 FTL 缓冲区尺寸。

InDesign在绘本画册排版设计领域中的应用研究

研究Adobe InDesign在绘本画册排版设计领域中的应用方法,总结InDesign软件所具有的优势和重要的功能,并对印刷出版行业中使用InDesign软件的常用问题进行研究,明确InDesign软件的关键功能和重要使用方法。

公务机驾驶舱内饰布局设计感性评价

为提升公务机的航空安全和适航性能,营造合适的驾驶舱环境氛围,构建了公务机驾驶舱内饰布局设计的感性评价模型,提出了系统化的设计知识以指导公务机驾驶舱内饰布局的感性设计优化。首先,基于图像边缘检测技术提取设计特征,建立了公务机驾驶舱内饰布局设计案例库。其次,通过对感性语汇的搜集与聚类,构建了能诠释公务机驾驶舱内饰布局设计表象、抽象、意象信息的“实体层—秩序层—氛围层”感性意象空间。然后,融合“主观评价—眼动—面部表情”3个指标的数据,从“实体层—秩序层—氛围层”3个感性意象评价维度建立了公务机驾驶舱内饰布局设计的综合感性评价模型。最后,分别从整体层和细节层两个层次剖析了公务机驾驶舱内饰布局设计特征与感性评价之间的映射关系,并形成系统的设计优化知识。为公务机驾驶舱内饰布局设计感性评价提供了新的实验范式及数据分析体系,为其内饰布局设计提供了方法指导。

大型医院交通集散空间布局规划及优化研究

近年来医院发展朝着大型化和综合化形式迈进,同时也带来了一系列交通问题。本文就医院外部集散空间布局形式进行研究并改进,以缓解大型医院外部的交通拥堵混乱问题。通过分析大型医院外部空间的使用需求,重新界定了医院交通集散空间的范围与功能;结合其空间流线需求与建筑广场、城市道路设计理论,分析了医院集散空间的交通特征与规划要点;最后提出了各功能区布局原则,并从医院内外临时停车、交通设施布置、道路功能划分等方面阐明了医院交通集散空间的规划方法。针对不同形式医院的布局,分别设置了复合立体型、平面广场型和用地紧缺性三种形式,为城市规划设计者提供参考。

强内涵 促发展——现代中医医院建筑形态布局研究

结合中医医院建筑的发展历程和时代需求,对我国当今中医医院建筑形态布局的类型进行归纳,分析总结各类形态布局特点,探讨中医医院建筑形态布局的设计方法,提出与自然环境有机结合、传承创新建筑文化、功能布局高效便捷、弹性设计等设计策略,为现代中医医院建筑形态布局设计提供参考。