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基于双向流固耦合的旋翼振动响应及噪声仿真分析

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南京航空航天大学学报 2024年第2期56卷 242-252页

作者：朱鹏辉姜金辉崔文旭南京航空航天大学航空航天结构力学及控制全国重点实验室南京210016

为精确预估流固耦合效应对旋翼桨叶振动响应及噪声计算的影响,本文建立了计算流体力学(Computational fluid dynamics,CFD)模型和高精度结构有限元模型,基于弱流固耦合方法完成了旋翼单向及双向流固耦合计算,并采用基于Kirchhoff方法对F... 详细信息

为精确预估流固耦合效应对旋翼桨叶振动响应及噪声计算的影响,本文建立了计算流体力学(Computational fluid dynamics,CFD)模型和高精度结构有限元模型,基于弱流固耦合方法完成了旋翼单向及双向流固耦合计算,并采用基于Kirchhoff方法对FW⁃H方程进行求解,分析了旋翼近场旋转噪声。首先,基于地面模态分析试验对桨叶结构有限元模型进行高精度建模,同时完成旋翼旋转状态的CFD计算,并采用两种网格映射方式和四点插值法进行流场与结构的数据传递,完成了旋翼单向稳态及单向瞬态流固耦合分析。然后采用双向弱流固耦合方法计算结构动响应及非定常流场,分析比较单、双向流固耦合计算方法下桨叶振动响应的差异。最后,基于单、双向流固耦合计算得到桨叶表面的时变气动压强,计算旋翼旋转噪声,分析比较单、双向流固耦合计算方法的旋转噪声大小及分布特征。结果表明,文中基于高精度桨叶模型及双向流固耦合方法计算出的桨叶动响应及噪声分布符合悬停旋转噪声规律,可为未来桨叶结构设计、强度校核及噪声预估提供参考。

关键词：旋翼有限元模型流固耦合效应动响应旋转噪声

Multidisciplinary design optimization of adaptive wing leading edge

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Science China(Technological Sciences) 2013年第7期56卷 1790-1797页

作者： SUN RuJie CHEN GuoPing ZHOU Chen ZHOU LanWei jiang jinhui State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and Astronautics

Adaptive wing can significantly enhance aircraft aerodynamic performance, which refers to aerodynamic and structural opti-mization designs. This paper introduces a two-step approach to solve the interrelated problems of the adaptive leading edge. In the first step, the procedure of airfoil optimization is carried out with an initial configuration of NACA 0006. On the basis of the combination of design of experiment (DOE), response surface method (RSM) and genetic algorithm (GA), an adaptive air-foil can be obtained whose lift-to-drag ratio is larger than the baseline airfoil's at the given angle of attack and subsonic speed.The next step is to design a compliant structure to achieve the target airfoil shape, which is the optimization result of the previous step. In order to minimize the deviation of the deformed shape from the target shape, the load path representation topology method is presented. This method is developed by way of GA, with size and shape optimization incorporated in it simul-taneously. Finally, a comparison study with the Solid Isotropic Material with Penalization (SIMP) method in Altair OptiStruct is conducted, and the results demonstrate the validity and effectiveness of the proposed approach.

关键词： adaptive wing multidisciplinary design optimization aerodynamic optimization structural optimization genetic algorithm

水库移民后续帮扶与乡村振兴战略衔接研究——以淅川县邹庄村为例

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长江技术经济 2024年第3期8卷 44-49,66页

作者：陆非江进辉长江勘测规划设计研究有限责任公司武汉430010

在国家实施“十四五”规划和乡村振兴战略的宏观背景下,如何在大中型水利水电工程移民后期扶持工作中落实乡村振兴战略,是新时期对工程移民安置工作者提出的新要求。以习近平总书记2021年考察的河南省淅川县邹庄村为例,对移民发展面临... 详细信息

在国家实施“十四五”规划和乡村振兴战略的宏观背景下,如何在大中型水利水电工程移民后期扶持工作中落实乡村振兴战略,是新时期对工程移民安置工作者提出的新要求。以习近平总书记2021年考察的河南省淅川县邹庄村为例,对移民发展面临的土地资源有限且分散、产业发展存在瓶颈、利益联结机制不紧密、设施存在重建轻管、专业人才及管理能力欠缺、旅游业自然禀赋不足等问题进行全面分析后,提出了以打造红色教育基地和乡村振兴样板为目标,以红色游线为载体,全面融合红色文化、移民文化、楚文化等人文内容,打造一二三产业融合发展、村庄特色风貌彰显的移民村乡村振兴样板。针对移民后期扶持工作的引领与衔接、三产融合发展、精神文化的挖掘与保护和拓宽移民受益渠道等方面提出了相关建议。

关键词：水库移民后续帮扶乡村振兴红色环线

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含有不确定参数结构的数据驱动载荷识别方法

Acta Mechanica Sinica 2024年第2期40卷 199-213页

作者：崔文旭姜金辉孙慧玉杨泓基王旭王立辉李鸿秋 State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China College of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing210037China Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of EducationSoutheast UniversityNanjing210016China Mechatronic Engineering College Jinling Institute of TechnologyNanjing211169China

动载荷识别在结构设计和优化中起着至关重要的作用目前的大多数研究都集中在确定性结构上.然而,实际工程结构中的结构参数是未知的.不确定参数的存在会导致载荷识别结果与实际载荷值之间的误差,因此研究不确定结构的动载荷识别问题至关... 详细信息

动载荷识别在结构设计和优化中起着至关重要的作用目前的大多数研究都集中在确定性结构上.然而,实际工程结构中的结构参数是未知的.不确定参数的存在会导致载荷识别结果与实际载荷值之间的误差,因此研究不确定结构的动载荷识别问题至关重要的.本文针对含有不确定参数的结构,提出了一种数据驱动的动载荷识别方法.首先,将不确定参数由一组闭区间向量表征.然后引入卷积神经网络(CNN)对未知载荷区间进行重构.将区间分析理论与泰勒展开相结合,得到了监督载荷的上下边界,并将其用作训练样本.最后,训练后的CNN模型直接识别未知载荷区间的边界.仿真结果表明,该方法具有较高的载荷识别精度和对噪声的鲁棒性.我们构造了一个简支梁结构进行实验,以进一步验证所提出方法在工程中的可行性.此外,我们还讨论了测量点分布和样本数量对识别精度的影响,这有利于在工程实践中的应用。

关键词：数据驱动载荷识别不确定结构不确定参数样本数量泰勒展开测量点分布闭区间

大中型水利水电工程移民安置全过程信息平台设计与应用

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水利水电快报 2024年第1期45卷 116-122页

作者：江进辉王鄂豫李鹏长江勘测规划设计研究有限责任公司湖北武汉430010

为适应新形势下移民安置管理工作需要,发挥信息技术优势,按照“平台+应用”的设计思想,面向移民安置工作全过程,以GIS为主要技术平台,融合BIM、CAD数据,支持协同工作,聚焦应用支撑,构建移民安置信息平台。平台能为监理、评估、设计、业... 详细信息

为适应新形势下移民安置管理工作需要,发挥信息技术优势,按照“平台+应用”的设计思想,面向移民安置工作全过程,以GIS为主要技术平台,融合BIM、CAD数据,支持协同工作,聚焦应用支撑,构建移民安置信息平台。平台能为监理、评估、设计、业主、政府、移民六方提供服务,满足在工程规划论证、实物调查、移民工程规划设计、移民安置实施、移民后期扶持等全过程阶段对信息化技术的要求。该平台已在多个项目中进行了实践与优化,能有效地规范移民工作、提高工作效率、促进科学决策、实现高效管理。

关键词：移民安置信息平台征地移民全过程信息化水利水电工程

Polymersomes:From Macromolecular Self-Assembly to Particle Assembly

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Chinese Journal of Chemistry 2022年第15期40卷 1842-1855页

作者： Jiamin Zhang jinhui jiang Sha Lin Erik Jan Cornel Chang Li Jjianzhong Du Department of Polymeric Materials Schoolof Materials Science and EngineeringTongji University4800 Caoan RoadShanghai 201804China Department of Gynaecology and Obstetrics Shanghai Fourth People's HospitalSchool of MedicineTongji UniversityShanghai 200434China

What is the most favorite and original chemistry developed in your research group?Ring-opening polymerization-induced self-assembly of N-carboxyanhydrides(NCA-PISA),and fusion-induced particle assembly(FIPA).How do you get into this specific field?Could you please share some experiences with our readers?NCA-PISA was developed to solve the biodegradability problem of nanoparticles by traditional PISA,while FIPA was inspired by nature.

关键词： Polymersomes(polymer vesicles) Nanoparticles Biomedical applications Macromolecular self-assembly Polymerization-induced self-assembly Particle assembly

A novel integrated microfluidic chip for on-demand electrostatic droplet charging and sorting

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Bio-Design and Manufacturing 2024年第1期7卷 31-42页

作者： jinhui Yao Chunhua He Jianxin Wang Canfeng Yang Ye jiang Zhiyong Liu Guanglan Liao Tielin Shi State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

On-demand droplet sorting is extensively applied for the efficient manipulation and genome-wide analysis of individual cells.However,state-of-the-art microfluidic chips for droplet sorting still suffer from low sorting speeds,sample loss,and labor-intensive preparation procedures.Here,we demonstrate the development of a novel microfluidic chip that integrates droplet generation,on-demand electrostatic droplet charging,and high-throughput sorting.The charging electrode is a copper wire buried above the nozzle of the microchannel,and the deflecting electrode is the phosphate buffered saline in the microchannel,which greatly simplifies the structure and fabrication process of the chip.Moreover,this chip is capable of high-frequency droplet generation and sorting,with a frequency of 11.757 kHz in the drop state.The chip completes the selective charging process via electrostatic induction during droplet generation.On-demand charged microdroplets can arbitrarilymove to specific exit channels in a three-dimensional(3D)-deflected electric field,which can be controlled according to user requirements,and the flux of droplet deflection is thereby significantly enhanced.Furthermore,a lossless modification strategy is presented to improve the accuracy of droplet deflection or harvest rate from 97.49% to 99.38% by monitoring the frequency of droplet generation in real time and feeding it back to the charging signal.This chip has great potential for quantitative processing and analysis of single cells for elucidating cell-to-cell variations.

关键词： Copper wire Droplet generation Droplet sorting Microfluidic chips On-demand charging

Fragment Propagation and Colonization Ability Enhanced and Varied at Node Level after Escaping from Apical Dominance in Submerged Macrophytes

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Journal of Integrative Plant Biology 2009年第3期51卷 308-315页

作者： jinhui jiang Shuqing An Changfang Zhou Baohua Guan Zhiyi Sun Ying Cai Fude Liu State Key Laboratory of Pollution Control and Resource Uses Nanjing University Nanjing 210093 China Institute of Wetland Ecology School of Life Sciences Nanjing University Nanjing 210093 China Laboratory of Forest Ecology and Global Changes School of Life Sciences Nanjing University Nanjing 210093 China

Aquatic plants develop strong fragment propagation and colonization ability to endure the natural disturbances. However, detailed research of ability to endure the natural disturbances has been lacking to date. Therefore, reproduction （shoot） and colonization （root） of shoot fragments of Potamogeton crispus L. with or without apices were investigated for the effect of apical dominance, and the growth of decapitated shoot fragments at three lengths （2, 4, 6 cm） was compared. Meanwhile, fragment propagation at levels of bud position was studied for bud position effect after escaping from apical dominance. The results showed significant increases occurred in the outgrowth of lateral branches on fragments decapitated compared with the fragments with apices, implying that apical dominance exists. Different lengths of fragments showed little difference in biomass allocations, but significant differences were noted in their propagation. Meanwhile, the effect of bud position was verified, due to the significant difference of average reproduction per node among the three length groups. Thus, the present study has made progress in the current understanding of aquatic plant dispersion among natural systems and contributes to improve methods of in vitro propagation for re-implantation purposes.

关键词： apical dominance bud position effect disturbed environment fragment propagation Potamogeton crispus.

Investigations on Structured Polyamide for Laser Sintered Body Armor

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Journal of Beijing Institute of Technology 2017年第1期26卷 38-44页

作者： jinhui jiang Xinming Qian Mengqi Yuan Tingchao Ji State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Stab resistance body armor（SRBA）is essential in protecting people from knife injuries.The protective parts of traditional SRBA are made of multi-layered ultra-high molecular weight polyethylene（UHMWPE）,which causes heavy heat stress for people wearing it.The protective parts of SRBA manufactured using laser sintering（LS）3D printing technology provide high manufacturing flexibility and low weight.Two different structures,plain plate and pyramid-structured plate,were investigated.The pyramid structure showed much higher stab resistance property then the plain plate,because of the angle and thickness effects.This is the first effort applying the LS technology and polyamide（PA）material（PA3200）on SRBA.By applying the pyramid structure on the protective layer of the SRBA,the total weight could reduce 30%-40%.

关键词： stab resistance body armor 3D printing laser sintering pyramid structure