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Topology Optimization of Acoustic-Mechanical Structures for Enhancing Sound Quality

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Acta Mechanica Solida Sinica 2023年第5期36卷 612-623页

作者： Lei Xu weisheng zhang Zhenyu Liu Xu Guo State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of TechnologyDalian 116023China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

Sound quality is one of the essential criteria for measuring the acoustic performance of acoustic *** contrast to the optimization of sound characteristics,both the quantitative description of sound quality and the numerical instability that may occur during optimization need to be *** the present work,an explicit topology optimization approach is proposed to enhance the sound quality of acoustic-mechanical structures,where the sound quality is described,resorting to frequency response within a specified frequency *** this end,the moving morphable component(MMC)-based approach is adopted to achieve the explicit topology design,and the mixed finite element method is introduced to evaluate the sound *** the use of the explicit description of MMC,the acoustic-structure boundary can be captured accurately,which is important for acoustic response ***,a regularization topology optimization formulation is also developed to avoid the numerical issues produced in some special frequency *** examples demonstrate the effectiveness of the proposed approach in improving sound quality performance.

关键词： Acoustic-structure Topology optimization Moving morphable component(MMC) Sound performance

Heterogeneous tide-surge interaction during co-occurrence of tropical and extratropical cyclones in the radial sand ridges of the southern Yellow Sea

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Journal of Oceanology and Limnology 2019年第6期37卷 1879-1898页

作者： XIONG Mengjie zhang Jinshan zhang weisheng YIN Chengtuan Nanjing Hydraulic Research Institute Nanjing 210029China State Key Laboratory of Hydrology Water Resources and Hydraulic EngineeringNanjing 210029China

The Radial Sand Ridges(RSRs)area in the southern Yellow Sea are subject to tropical and extratropical cyclone activities frequently,in which the special geometry feature and moving stationary tidal system result in complex storm-induced hydrodynamic processes,especially the tide-surge *** studied a rare weather event influenced simultaneously by an extratropical cyclone EX1410 and Typhoon Vongfong as an example to investigate the characteristics of storm surges,wave-surge,and tide-surge interaction in the RSRs area,and applied a high-resolution integrally-coupled ADCIRC+SWAN model,in which the meteorological forcing inputs are simulated by the WRF-ARW *** model is validated by records from 4 tide gauges and 2 wave buoys along the Yellow Sea *** show that the tide-surge interactions are of considerable regional *** surge curves at Lüsi(in south RSRs)and Jianggang(in middle RSRs)have abrupt falls near the time of low tide,where the peak occurrence time of interaction residuals tend to shift towards the mid-ebb *** increase of bed shear stress in shallow waters was proved the dominant factor to affect the tide-surge interaction in broad tidal flats of the RSRs ***,the interaction pattern in the Xiyang Trough(in north RSRs),showed a unique rising in mid-flood period due to the phase advances of real surge waves in relatively deep ***,we suggested to the local flood risk management that the tide-surge interaction tends to alleviate the flooding risk in the RSRs area around the time of high tide,but aggravate the risk on the rising tide in the Xiyang Trough and on the falling tide in large-scale tidal flats of the southem RSRs area.

关键词： ADCIRC+SWAN model Radial Sand Ridges Jiangsu coast extratropical cyclone tide-surge interaction

Topology Optimization Considering Steady-State Structural Dynamic Responses via Moving Morphable Component(MMC)Approach

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Acta Mechanica Solida Sinica 2022年第6期35卷 949-960页

作者： Jialin Li Youwei zhang Zongliang Du weisheng zhang Xinglin Guo Xu Guo State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of TechnologyDalian116023China Ningbo Institute of Dalian University of Technology Ningbo315016China

This work presents a moving morphable component(MMC)-based framework for solving topology optimization problems considering both single-frequency and band-frequency steady-state structural dynamic *** this work,a set of morphable components are introduced as the basic building blocks for topology optimization,and the optimized structural layout can be found by optimizing the parameters characterizing the locations and geometries of the components *** degree of freedom(DOF)elimination technique is also employed to delete unnecessary DOFs at each *** the proposed approach solves the corresponding optimization problems in an explicit way,some challenging issues(e.g.,the large computational burden related to finite element analysis and sensitivity analysis,the localized eigenmodes in low material density regions,and the impact of excitation frequency on the optimization process)associated with the traditional approaches can be circumvented *** results show that the proposed approach is effective for solving topology optimization problems involving structural dynamic behaviors,especially when high-frequency responses are considered.

关键词： Topology optimization Moving morphable component(MMC) Structural dynamic response Dynamic compliance

Numerical study on effect of tidal phase on storm surge in the South Yellow Sea

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Journal of Oceanology and Limnology 2019年第6期37卷 2037-2055页

作者： zhang weisheng TENG Ling zhang Jinshan XIONG Mengjie YIN Chengtuan Nanjing Hydraulic Research Institute State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

Because of the special topography and large tidal range in the South Yellow Sea,the dynamic process of tide and storm surge is very *** shallow water circulation model Advanced Circulation(ADCIRC)was used to simulate the storm surge process during typhoon Winnie,Prapiroon,and Damrey,which represents three types of tracks attacking the South Yellow Sea,which are,moving northward after landing,no landing but active in offshore areas,and landing straightly to the *** experiments were carried out to investigate the effects of tidal phase on the tide-surge interaction as well as storm *** results show that the peak surge caused by Winnie and Prapiroon occurs 2-5 h before the high tide and its occurring time relative to high tide has little change with tidal phase *** the contrary,under the action of Damrey,the occurring time of the peak surge relative to high tide varies with tidal *** variation of tide-surge interaction is about 0.06-0.37 m,and the amplitude variations of interaction are smooth when tidal phase changes for Typhoon Winnie and *** the interaction is about 0.07-0.69 m,and great differences exists among the stations for Typhoon *** can be concluded that the tide-surge interaction of the former is dominated by the tidal phase modulation,and the time of surge peak is insensitive to the tidal phase *** the interaction of the latter is dominated by storm surge modulation due to the water depth varying with tide,the time of surge peak is significantly affected by tidal ***,influence of tidal phase on storm surge is related to typhoon tracks which may provide very useful information at the design stage of coastal protection systems.

关键词： storm surge tidal phase tide-surge interaction South Yellow Sea Advanced Circulation(ADCIRC)model

Recent advances in organic cathodes for dual-ion batteries

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Science China Chemistry 2024年第12期67卷 4014-4036页

作者： Wenli Hu weisheng zhang Chenxing zhang Chengqiu Li Shilin Mei Chang-Jiang Yao State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China

Dual-ion batteries(DIBs),a novel energy storage technology wherein both anions and cations actively participate in the electrochemical redox process,hold great promise for further cost reduction in chemical energy *** materials have garnered significant attention as cathode materials for DIBs due to high working voltage,exceptional rate capability,environmental friendliness,and unique designable *** review provides a detailed discussion of the energy storage mechanism and typical characteristics of organic cathode materials from various reaction active *** work also highlights the current limitations and proposes ideas for ***,potential future directions for the advancement of DIBs are summarized.

关键词： dual-ion batteries organic cathode energy storage high working voltage anion storage

Unveiling Organic Electrode Materials in Aqueous Zinc-Ion Batteries:From Structural Design to Electrochemical Performance

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Nano-Micro Letters 2024年第10期16卷 47-81页

作者： Dujuan Li Yuxuan Guo Chenxing zhang Xianhe Chen weisheng zhang Shilin Mei Chang-Jiang Yao State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081People's Republic of China

Aqueous zinc-ion batteries(AZIBs)are one of the most compelling alternatives of lithium-ion batteries due to their inherent safety and economics *** response to the growing demand for green and sustainable energy storage solutions,organic electrodes with the scalability from inexpensive starting materials and potential for biodegradation after use have become a prominent choice for *** gratifying progresses of organic molecules with electrochemical performance in AZIBs,the research is still in infancy and hampered by certain issues due to the underlying complex *** for designing organic electrode materials for AZIBs with high specific capacity and long cycling life are discussed in detail in this ***,we put emphasis on the unique electrochemistry of different redox-active structures to provide in-depth understanding of their working *** addition,we highlight the importance of molecular size/dimension regarding their profound impact on electrochemical ***,challenges and perspectives are discussed from the developing point of view for future *** hope to provide a valuable evaluation on organic electrode materials for AZIBs in our context and give inspiration for the rational design of high-performance AZIBs.

关键词： Aqueous zinc-ion batteries Organic electrodes Functional groups Molecular size/geometry Electrochemical performances

Progressive paradoxical sleep deprivation impairs partial memory following learning tasks in rats

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Neural Regeneration Research 2008年第6期3卷 598-603页

作者： Chunmin Zhu Xiangrong Yao weisheng zhang Yanfeng Song Yiping Hou Laboratory of Neurobiology Department of Anatomy Histology and Embryology School of Basic Medical Sciences Lanzhou University Lanzhou 730000 Gansu Province China Department of Neurology Anning Branch of Lanzhou General Hospital of Lanzhou Military Area Command of Chinese PLA Lanzhou 730070 Gansu Province China Department of Anal-Rectal Surgery Gansu Province Hospital Lanzhou 730000 Gansu Province China

BACKGROUND： Complex learning tasks result in a greater number of paradoxical sleep phases, which can improve memory. The effect of paradoxical sleep deprivation, induced by ＂flower pot＂ technique, on spatial reference memory and working memory require further research. OBJECTIVE： To observe the effect of progressive paradoxical sleep deprivation in rats, subsequent to learning, on memory using the Morris Water Maze. DESIGN, TIME AND SETTING： Controlled observation experiment. The experiment was performed at the Laboratory of Neurobiology, Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Lanzhou University from December 2006 to October 2007. MATERIALS： Twenty-eight, male, Wistar rats, 3-4 months old, were provided by the Experimental Animal Center of Lanzhou University. The Morris Water Maze and behavioral analyses system was purchased from Genheart Company, Beijing, China. METHODS： All animals, according to a random digits table, were randomly divided into paradoxical sleep deprivation, tank control, and home cage control groups. Paradoxical sleep deprivation was induced by the ＂flower pot＂ technique for 72 hours, housing the rats on small platforms over water. Rats in the ＂tank control＂ and ＂home cage control＂ groups were housed either in a tank with large platforms over the water or in normal cages without paradoxical sleep deprivation. MAIN OUTCOME MEASURES： Morris Water Maze was employed for task learning and spatial memory testing. Rats in all groups were placed at six random starting points each day for four consecutive days. Each placement was repeated for two trials; the first trial represented reference memory and the second working memory. Rats in the first trial were allowed to locate the submerged platform within 120 seconds. Data, including swimming distance, escape latency, swimming velocity, percentage of time in correct quarter, and memory scores were recorded and analyzed automatically by behavioral analyses systems

关键词： paradoxical sleep deprivation Morris Water Maze spatial reference memory working memory

Explicit Topology Optimization Design of Stiffened Plate Structures Based on the Moving Morphable Component(MMC)Method

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Computer Modeling in Engineering & Sciences 2023年第5期135卷 809-838页

作者： Xudong Jiang Chang Liu Shaohui zhang weisheng zhang ZongliangDu Xiaoyu zhang Huizhong Zeng Xu Guo Department of Engineering Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentInternational Research Center for Computational MechanicsDalian University of TechnologyDalian116023China Ningbo Institute of Dalian University of Technology Ningbo315016China Beijing Institute of Spacecraft System Engineering Beijing100094China

This paper proposes an explicit method for topology optimization of stiffened plate *** present work is devoted to simultaneously optimizing stiffeners’shape,size and layout by seeking the optimal geometry parameters of a series of moving morphable components(MMC).The stiffeners with straight skeletons and the stiffeners with curved skeletons are considered to enhance the modeling and optimization capability of the current *** the stiffeners are represented under the Lagrangian-description framework in a fully explicit way,and the adaptive ground structure method,as well as dynamically updated plate/shell elements,is used to obtain optimized designs with more accurate analysis *** with existing works,the proposed approach provides an explicit description of the ***,a stiffened plate structure with clear stiffener distribution and smooth geometric boundary can be *** numerical examples provided,including straight and curved stiffeners,hierarchical stiffeners,and a stiffened plate with a cutout,validate the effectiveness and applicability of the proposed approach.

关键词： Topology optimization stiffened plate structures moving morphable component(MMC) straight/curved skeletons

U-Pb Zircon and Re-Os Molybdenite Geochronology of the W-Mo Mineralized Region of South Qinling, China, and their Tectonic Implications

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 500-516页

作者： HAN Ke YANG Xingke CHAO Huixia HE Hujun RUAN Shiqi GAO Yunfeng zhang weisheng ZHU Wei JIN Gang School of Earth Science and Resources Chang an UniversityXi'an 710054China Key Laboratory of West Mineral Resources and Geology Engineering Ministry of Education Chang'an UniversityXi'an 710054China Shaanxi Mineral Resources and Geological Survey Xi'an 710054China

A W-Mo mineralized region is located along the northern margin of the South Qinling tectonic belt of China. WMo mineralization occurs mainly in Cambrian–Ordovician clastic and carbonate rocks, and the ore bodies are structurally controlled by NW–SE-and NNE–SSW-striking faults. Evidence for magmatism in the area is widespread and is dominated by intermediate–felsic intrusives or apophyses, such as the Dongjiangkou, Yanzhiba, Lanbandeng, and Sihaiping granitic bodies. Quartz-vein-type mineralization and fault-controlled skarn-type mineralization dominate the ore systems, with additional enrichment in residual deposits. At present, there are few or insufficient studies on(1) the age of mineralization,(2) the relationship between intermediate–felsic granite and W-Mo mineralization,(3) the source of ore-forming materials, and(4) the metallogenic and tectonic setting of the mineralized area. In this paper, we present geochronology results for numerous intrusive granitic bodies in the South Qinling tectonic belt. U-Pb zircon geochronology of the Lanbandeng monzogranite and Wangjiaping biotite monzogranite yields ages of 222.7 ± 2.3 and 201.9 ± 1.8 Ma, respectively. In contrast to the Late Triassic age of the Lanbandeng monzogranite, the age of the newly discovered Wangjiaping biotite monzogranite places it at the Triassic–Jurassic boundary. Re-Os molybdenite geochronology on the Qipangou W-Mo deposit yielded a model age of 199.7 ± 3.9 Ma, indicating the deposit formed in the early Yanshanian period of the Early Jurassic. Granitoid intrusions in the mineralized area are characterized by composite granite bodies that crystallized at ca. 240–190 Ma. While there were multiple stages of intrusion, most occurred at 210–220 Ma, with waning magmatic activity at 200–190 Ma. The Re-Os age of molybdenite in the region is ca. 200–190 Ma, which may represent a newly discovered period of W-Mo metallogenesis that occurred during the final stages of magmatism. The heat associated with thi

关键词： U-Pb zircon geochronology Re-Os molybdenite geochronology tungsten-molybdenum mineralized area intracontinental orogeny South Qinling