Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 946

年份

2024 3

2023 64

2022 82

2021 58

2020 56

2019 54

2018 47

2017 43

2016 45

2015 49

2014 27

2013 33

2012 29

2011 37

2010 44

2009 37

2008 47

2007 54

2006 35

2005 17

展开︾

关键词

数值模拟 26

仿真 15

多目标优化 9

可视化仿真 4

计算机模拟 4

系统仿真 3

5G 2

Agent 2

COVID-19 2

HLA/RTI 2

人工智能 2

优化 2

可靠性灵敏度 2

复杂系统 2

并联机构 2

建模仿真 2

数学模型 2

模拟 2

模糊控制 2

展开︾

检索范围：

排序：展示方式：

Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline

Yongqing SU, Yikuan SONG, Jiguang YUE

《机械工程前沿（英文）》 2009年第4卷第3期页码 339-344 doi: 10.1007/s11465-009-0048-3

摘要： The controllability of the magneto-rheological fluid (MRF) flowing through a micro-pipeline is analyzed. The coupled formulas for MRF are deduced by analyzing the property of the flow field and magnetic field. Then, the relationship between the flow speed of MRF and the special shear stress under the effect of the magnetic field is founded. The model of the MRF and micro-pipeline is established by using multi-physics software of Comsol, the curve of - in an ideal condition is attained by modifying parameters, and by adding the boundary condition of the model. This paper provides a theoretical proof of the controllability of MRF flowing through the micro-pipeline and explores MRF’s application on the micro-drive and control field.

关键词： Magneto-rheological fluids (MRF) micro-pipeline coupled model multi-physics simulation

HTML PDF 收藏

Numerical simulation of multi-body floating piers to investigate pontoon stability

Mostafa Shahrabi, Khosrow Bargi

《结构与土木工程前沿（英文）》 2013年第7卷第3期页码 325-331 doi: 10.1007/s11709-013-0209-7

摘要： The objective of this study is to develop a procedure to analyze the motions of a floating pier comprised of several pontoons that are modeled as rigid bodies and connected to each other by flexible and rigid connectors. Recently, the use offloating piers has increased because of their advantages, such as faster and higher-quality construction, seismic force isolation for a full-scale mooring system, low dependence on local soil conditions and tides, ability to relocate or reconfigure the pier modules during the operation period and 75-100 years of repair-free service. A floating pier consists of a pier, access bridge, mooring system and fender system, each of which comes in many variations to suit different usages and construction considerations. The typical loads used in the design of these piers are dead loads, live loads, mooring loads, fender loads and environmental loads induced by wind, currents and waves. For numerical simulation, three types of piers are used: passenger piers, light-cargo piers and semi-heavy-cargo piers. The selected piers consist of several large pontoons joined by pivots and have a pile-based mooring system. These piers are modeled by SAP2000software as two-dimensional frames that are linked together. As the first step, each type of pier is subjected to loading, and its general behavior is assessed. According to this behavior, the major load combinations are described for the design of piers and analyzed to determine the behavior of the modules. Lastly, according to the analysis results and the safe use and stability considerations, such as the maximum draft and longitudinal gradient, the dimensions of each module in each pier type are presented.

关键词： coastal structures numerical simulation floating pier rigid pontoons stability

HTML PDF 收藏

Numerical modeling of current-induced scour around multi-wall foundation using large-eddy simulation

《结构与土木工程前沿（英文）》 2023年第17卷第4期页码 546-565 doi: 10.1007/s11709-023-0943-4

摘要： Scouring is one of the primary triggers of failure for bridges across rivers or seas. However, research concerning the scour mechanism of multi-wall foundations (MWFs) remains scarce, hindering the further application of MWFs. In this study, for the first time, the scouring effect caused by unidirectional flow around MWFs was examined numerically using FLOW-3D involving a large-eddy simulation. Initially, the applicability of the scouring model and input parameters was validated using a case study based on published measured data. Subsequently, the scouring effects of four MWFs with different wall arrangements and inflow angles, including the flow field analysis and scour pit and depth, were investigated thoroughly. It was found that the maximum scour depth of MWFs with an inflow angle of 0° was smaller than that of those with an inflow angle of 45°, regardless of the wall arrangement. Meanwhile, changing the inflow angle significantly affects the scour characteristics of MWFs arranged in parallel. In practical engineering, MWFs arranged in parallel are preferred considering the need for scouring resistance. However, a comparative analysis should be performed to consider comprehensively whether to adopt the form of a round wall arrangement when the inflow angle is not 0° or the inflow direction is changeable.

关键词： multi-wall foundation current-induced scour bridge foundation large-eddy simulation numerical analysis

HTML PDF 收藏

Where physics meets chemistry: Thin film deposition from reactive plasmas

Andrew Michelmore, Jason D. Whittle, James W. Bradley, Robert D. Short

《化学科学与工程前沿（英文）》 2016年第10卷第4期页码 441-458 doi: 10.1007/s11705-016-1598-7

摘要： Functionalising surfaces using polymeric thin films is an industrially important field. One technique for achieving nanoscale, controlled surface functionalization is plasma deposition. Plasma deposition has advantages over other surface engineering processes, including that it is solvent free, substrate and geometry independent, and the surface properties of the film can be designed by judicious choice of precursor and plasma conditions. Despite the utility of this method, the mechanisms of plasma polymer growth are generally unknown, and are usually described by chemical (i.e., radical) pathways. In this review, we aim to show that plasma physics drives the chemistry of the plasma phase, and surface-plasma interactions. For example, we show that ionic species can react in the plasma to form larger ions, and also arrive at surfaces with energies greater than 1000 kJ?mol (>10 eV) and thus facilitate surface reactions that have not been taken into account previously. Thus, improving thin film deposition processes requires an understanding of both physical and chemical processes in plasma.

关键词： thin films plasma physics plasma chemistry functionalization polymer

HTML PDF 收藏

空间物理和空间天气探测与研究

王赤

《中国工程科学》 2008年第10卷第6期页码 41-45

摘要：

空间物理学是1957年人造卫星发射成功后迅速发展起来的一门交叉学科。近50年来，空间已成为人类生存的第四环境，其重要性日益突出。20世纪90年代初，空间物理学与空间应用的密切结合产生了专门研究和预报空间环境中灾害性过程及其变化规律，减轻或防止空间灾害并为人类活动服务的空间天气学。文章简要总结了国外及国内空间物理和空间天气探测的历程和发展趋势，并提出对我国未来空间物理和空间天气探测发展规划和探测路线图的几点建议。

关键词：空间物理空间天气空间物理探测发展规划

HTML PDF 收藏

一种改进的Weibull分布杂波仿真方法

姜斌,和湘,黎湘,王宏强,郭桂蓉

《中国工程科学》 2007年第9卷第1期页码 44-48

摘要：

针对目前Weibull分布杂波仿真中没有考虑线性滤波器物理可实现性问题，首先深入研究了该杂波模型的统计特性及其ZMNL仿真方法；在此基础上，引入最小相位特性与复倒谱技术，提出了一种物理可实现的滤波器产生方法，同时详细阐述了物理可实现Weibull分布杂波随机序列产生的流程；最后，进行了仿真实验，仿真结果证明了该方法的准确性和有效性。该方法产生的杂波可用于雷达信号模拟、雷达图像分析及雷达最优信号处理器设计。

关键词： Weibull分布杂波 ZMNL 复倒谱物理可实现线性滤波器仿真

HTML PDF 收藏

大跨度双连拱公路隧道数值模拟与围岩稳定分析

任少强

《中国工程科学》 2009年第11卷第8期页码 58-63

摘要：

公路连拱隧道是近二三十年来随着高等级公路建设发展而出现的一种隧道结构形式，具有较好的适用性和优越性，尤其适用于用地受限、山区地形复杂、道路展线困难等情况。然而，连拱隧道相对于分离隧道，施工中必然存在对围岩的多次扰动，施工难度较大。在浅埋、围岩软弱、岩溶等复杂地质条件下，这类隧道在不同施工阶段围岩的稳定性问题备受关注。以沪蓉西高速公路恩施至利川段白果坝隧道为背景，结合现场施工，利用三维弹塑性分析程序MIDAS-GTS对白果坝隧道进行了数值模拟研究，对围岩力学性状变化进行了分析，得到了隧道开挖施工中围岩的应力变化规律，针对薄弱部位提出了具体措施。

关键词：连拱隧道数值模拟围岩应力

HTML PDF 收藏

物理学与中国能源可持续发展——献给2005世界物理年

杜祥琬,李庆忠

《中国工程科学》 2006年第8卷第2期页码 1-6

摘要：

物理学与工程技术有着密切的相互联系，能源工程技术与物理学的关系具有典型的代表性，物理学的应用可以对我国能源事业的发展做出重要的贡献。文章着重阐述了原子核物理学和核能工程（包括裂变核能和聚变核能），光电效应与光伏发电，风能、生物质能与物理学，物理化学与煤的多联产、洁净化技术，地球物理学与能源资源勘探等能源问题；讨论了物理学在节能中的三个应用：节能照明、建筑节能和交通节能；分析了中国能源的可持续发展前景。

关键词：物理学中国能源节能可持续发展

HTML PDF 收藏

用于重建物理和虚拟抓取的可重构数据手套 Article

刘航欣, 张泽宇, 焦子元, Zhenliang Zhang, Minchen Li, 蒋陈凡夫, 朱毅鑫, Song-Chun Zhu

《工程（英文）》 2024年第32卷第1期页码 203-220 doi: 10.1016/j.eng.2023.01.009

摘要：

In this work, we present a reconfigurable data glove design to capture different modes of human hand–object interactions, which are critical in training embodied artificial intelligence (AI) agents for fine manipulation tasks. To achieve various downstream tasks with distinct features, our reconfigurable data glove operates in three modes sharing a unified backbone design that reconstructs hand gestures in real time. In the tactile-sensing mode, the glove system aggregates manipulation force via customized force sensors made from a soft and thin piezoresistive material; this design minimizes interference during complex hand movements. The virtual reality (VR) mode enables real-time interaction in a physically plausible fashion: A caging-based approach is devised to determine stable grasps by detecting collision events. Leveraging a state-of-the-art finite element method, the simulation mode collects data on fine-grained four-dimensional manipulation events comprising hand and object motions in three-dimensional space and how the object's physical properties (e.g., stress and energy) change in accordance with manipulation over time. Notably, the glove system presented here is the first to use high-fidelity simulation to investigate the unobservable physical and causal factors behind manipulation actions. In a series of experiments, we characterize our data glove in terms of individual sensors and the overall system. More specifically, we evaluate the system's three modes by ① recording hand gestures and associated forces, ② improving manipulation fluency in VR, and ③ producing realistic simulation effects of various tool uses, respectively. Based on these three modes, our reconfigurable data glove collects and reconstructs fine-grained human grasp data in both physical and virtual environments, thereby opening up new avenues for the learning of manipulation skills for embodied AI agents.

关键词： Data glove Tactile sensing Virtual reality Physics-based simulation

HTML PDF 收藏

Design and simulation of a cable-pulley-based transmission for artificial ankle joints

Huaxin LIU,Marco CECCARELLI,Qiang HUANG

《机械工程前沿（英文）》 2016年第11卷第2期页码 170-183 doi: 10.1007/s11465-016-0383-0

摘要：

In this paper, a mechanical transmission based on cable pulley is proposed for human-like actuation in the artificial ankle joints of human-scale. The anatomy articular characteristics of the human ankle is discussed for proper biomimetic inspiration in designing an accurate, efficient, and robust motion control of artificial ankle joint devices. The design procedure is presented through the inclusion of conceptual considerations and design details for an interactive solution of the transmission system. A mechanical design is elaborated for the ankle joint angular with pitch motion. A multi-body dynamic simulation model is elaborated accordingly and evaluated numerically in the ADAMS environment. Results of the numerical simulations are discussed to evaluate the dynamic performance of the proposed design solution and to investigate the feasibility of the proposed design in future applications for humanoid robots.

关键词： biomimetic designs ankle joints cable-pulley transmissions multi-body dynamic simulation numerical characterization

HTML PDF 收藏

不辱历史使命致力民族强盛的中国工程物理研究院

《中国工程科学》 2001年第3卷第8期页码 91-92

HTML PDF 收藏

Dymola-based multi-parameters integrated optimization for high speed transfer system of LED chip sorter

Jie OUYANG, Bin LI, Shihua GONG

《机械工程前沿（英文）》 2013年第8卷第2期页码 118-126 doi: 10.1007/s11465-013-0253-y

摘要：

To enhance the performance of high speed transfer system of LED chip sorting equipment, its control parameters need to be well matching with the mechanical system. In practical issues, it is difficult and time-consuming work to get these parameters matched because their selection is strongly depended on individuals. In current work, an integrated optimization method was carried out to solve this problem, in which the multiple control parameters optimization, modeling and simulation were included, i.e., a multi-domain model of transfer system performed on Dymola platform. Based on this model, the searching area of the key control parameters was narrowed by performing integrated optimization. After that a group of parameters were selected from this narrowed area to perform the equipment’s controls. The result showed this method possesses a simple and reliable nature. The optimal solutions also indicated that the optimized control parameters can well satisfy the requirements of transfer system. On the other hand, it greatly reduced the engineering adjustment time by using this method.

关键词： LED chip sorter multi-domain modeling and simulation parameter optimization modelica language

HTML PDF 收藏

环境模拟技术——一门新的综合性工程技术

王浚

《中国工程科学》 2003年第5卷第3期页码 1-5

摘要：

环境模拟技术是一门新的边缘技术，主要研究各种自然环境的人工再现技术和在模拟环境下产品的试验技术；环境模拟设备及环境试验技术经历了由单参数模拟到多参数模拟、从静态模拟到动态模拟、从产品环境试验到人机系统环境试验的发展道路；当前发展方向是建立整机的多参数综合动态环境模拟设备和进行多参数综合动态试验及人机系统环境试验；在环模设备中再现各种环境条件，进行产品的环境可靠性试验，从而可更快地发现问题并找出原因，这对于新产品的开发和成品的质量检验具有重要的意义。

关键词：环境模拟多参数动态

HTML PDF 收藏

Physics-Informed Deep Learning-Based Real-Time Structural Response Prediction Method

Ying Zhou,Shiqiao Meng,Yujie Lou,Qingzhao Kong,

《工程（英文）》 doi: 10.1016/j.eng.2023.08.011

摘要： High-precision and efficient structural response prediction is essential for intelligent disaster prevention and mitigation in building structures, including post-earthquake damage assessment, structural health monitoring, and seismic resilience assessment of buildings. To improve the accuracy and efficiency of structural response prediction, this study proposes a novel physics-informed deep-learning-based real-time structural response prediction method that can predict a large number of nodes in a structure through a data-driven training method and an autoregressive training strategy. The proposed method includes a Phy-Seisformer model that incorporates the physical information of the structure into the model, thereby enabling higher-precision predictions. Experiments were conducted on a four-story masonry structure, an eleven-story reinforced concrete irregular structure, and a twenty-one-story reinforced concrete frame structure to verify the accuracy and efficiency of the proposed method. In addition, the effectiveness of the structure in the Phy-Seisformer model was verified using an ablation study. Furthermore, by conducting a comparative experiment, the impact of the range of seismic wave amplitudes on the prediction accuracy was studied. The experimental results show that the method proposed in this paper can achieve very high accuracy and at least 5000 times faster calculation speed than finite element calculations for different types of building structures.

关键词： Structural seismic response prediction Physics information informed Real-time prediction Earthquake engineering Data-driven machine learning

HTML PDF 收藏

Self-organizing method for collaboration in multi-robot system on basis of balance principle

DONG Yangbin, JIANG Jinping, HE Yan

《机械工程前沿（英文）》 2008年第3卷第3期页码 283-287 doi: 10.1007/s11465-008-0044-z

摘要： By analyzing the operation characteristics of two subtasks that have resource dependency on each other, this paper demonstrates the impact of progress relation between the two subtasks on the whole task’s progress, and then puts forward a self-organizing principle called balance principle that keeps the individual profit between robots equal. Furthermore, an algorithm is designed for adjusting subtask selection on the basis of this principle. Simulation shows the validity of the algorithm on self-organizing task allocation in a multi-robot system.

关键词： algorithm self-organizing principle validity Simulation allocation