This study aimed to comprehensively investigate the essential considerations in designing adaptive clothing for women with lower limb prostheses in Saudi Arabia. Employing a qualitative methodology, the research entai...This study aimed to comprehensively investigate the essential considerations in designing adaptive clothing for women with lower limb prostheses in Saudi Arabia. Employing a qualitative methodology, the research entailed semi-structured, in-depth interviews with women utilizing lower limb prostheses and prosthetic specialists. This approach was selected to unearth pivotal design prerequisites and comprehend the specific challenges these women encounter within the realm of clothing. The utilization of selective sampling facilitated the collection of intricate and valuable insights. A Functional, Expressive, and Aesthetic (FEA) User Needs model was utilized to scrutinize participant feedback. Functional requisites encompass ease of dressing and undressing, accessibility to the prosthetic limb, comfort, mobility with the prosthesis, and appropriate fit. Additionally, participants highlighted various expressive needs, including privacy preservation, modesty, camouflaging disability appearances, maintaining alignment with non-disabled women’s fashion, and considerations about the aesthetic aspects of garments.展开更多
Excessive vibration of aircraft wings during flight is harmful and may cause propagation of existing cracks in the material, leading to catastrophic failures as a result of material fatigue. This study investigates th...Excessive vibration of aircraft wings during flight is harmful and may cause propagation of existing cracks in the material, leading to catastrophic failures as a result of material fatigue. This study investigates the variations of modal characteristics of aircraft wings with respect to changes in the structural configurations. We develop parametric Computer-Aided Design (CAD) models to capture new design intend on the aircraft wing architectures. Subsequent Finite Element Analysis (FEA) based vibration analysis is performed to study the effects of architecture changes on the wing’s natural frequencies and mode shapes. It is concluded that the spar placement and the number of ribs have significant influence on the wing’s natural vibration properties. Integrating CAD modelling and FEA vibration analysis enables designers to develop alternative wing architectures to implement design requirements in the preliminary design stage.展开更多
驱动电机转矩脉动直接影响整车NVH性能,针对其优化抑制难题,提出融合多项式增强平均权重径向基函数(weighted average and polynomial augmented radial basis function,WPRBF)代理模型与多目标能量谷优化算法(multi-objective energy v...驱动电机转矩脉动直接影响整车NVH性能,针对其优化抑制难题,提出融合多项式增强平均权重径向基函数(weighted average and polynomial augmented radial basis function,WPRBF)代理模型与多目标能量谷优化算法(multi-objective energy valley optimizer,MEVO)的协同优化框架。首先建立电机参数化有限元模型并进行台架实验验证;其次采用拉丁超立方抽样开展实验设计获取样本,提出WPRBF方法构建高精度代理模型;最后采用MEVO算法开展多目标优化设计,并引入熵权-模糊集理论综合决策机制获取Pareto前沿最优解。结果表明:(1)WPRBF模型在相同建模精度的前提下,较传统KRG代理模型减少约40%的样本需求;(2)优化后电机转矩输出均值提升6.83%,转矩脉动系数降低20.00%,齿槽转矩峰值削减23.80%。验证了本文方法的有效性。展开更多
文摘This study aimed to comprehensively investigate the essential considerations in designing adaptive clothing for women with lower limb prostheses in Saudi Arabia. Employing a qualitative methodology, the research entailed semi-structured, in-depth interviews with women utilizing lower limb prostheses and prosthetic specialists. This approach was selected to unearth pivotal design prerequisites and comprehend the specific challenges these women encounter within the realm of clothing. The utilization of selective sampling facilitated the collection of intricate and valuable insights. A Functional, Expressive, and Aesthetic (FEA) User Needs model was utilized to scrutinize participant feedback. Functional requisites encompass ease of dressing and undressing, accessibility to the prosthetic limb, comfort, mobility with the prosthesis, and appropriate fit. Additionally, participants highlighted various expressive needs, including privacy preservation, modesty, camouflaging disability appearances, maintaining alignment with non-disabled women’s fashion, and considerations about the aesthetic aspects of garments.
文摘Excessive vibration of aircraft wings during flight is harmful and may cause propagation of existing cracks in the material, leading to catastrophic failures as a result of material fatigue. This study investigates the variations of modal characteristics of aircraft wings with respect to changes in the structural configurations. We develop parametric Computer-Aided Design (CAD) models to capture new design intend on the aircraft wing architectures. Subsequent Finite Element Analysis (FEA) based vibration analysis is performed to study the effects of architecture changes on the wing’s natural frequencies and mode shapes. It is concluded that the spar placement and the number of ribs have significant influence on the wing’s natural vibration properties. Integrating CAD modelling and FEA vibration analysis enables designers to develop alternative wing architectures to implement design requirements in the preliminary design stage.
基金2023年度武汉市知识创新专项-曙光计划项目Knowledge Innovation Program of Wuhan-Shuguang(2023020201020339)2022年中央高校新青年科研启动基金项目(G1323522065)2024年湖北省人文社会科学重点研究基地人文类项目(CJHIXM-04-S202406)的阶段性研究成果。
文摘驱动电机转矩脉动直接影响整车NVH性能,针对其优化抑制难题,提出融合多项式增强平均权重径向基函数(weighted average and polynomial augmented radial basis function,WPRBF)代理模型与多目标能量谷优化算法(multi-objective energy valley optimizer,MEVO)的协同优化框架。首先建立电机参数化有限元模型并进行台架实验验证;其次采用拉丁超立方抽样开展实验设计获取样本,提出WPRBF方法构建高精度代理模型;最后采用MEVO算法开展多目标优化设计,并引入熵权-模糊集理论综合决策机制获取Pareto前沿最优解。结果表明:(1)WPRBF模型在相同建模精度的前提下,较传统KRG代理模型减少约40%的样本需求;(2)优化后电机转矩输出均值提升6.83%,转矩脉动系数降低20.00%,齿槽转矩峰值削减23.80%。验证了本文方法的有效性。
