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 465

会议视频 17

会议专题 1

年份

2024 2

2023 21

2022 28

2021 32

2020 29

2019 24

2018 13

2017 17

2016 20

2015 14

2014 14

2013 19

2012 12

2011 28

2010 33

2009 30

2008 32

2007 38

2006 16

2005 12

展开︾

关键词

数值模拟 26

仿真 16

仿真技术 11

可视化仿真 4

计算机模拟 4

复杂系统 3

系统仿真 3

Agent 2

HLA/RTI 2

优化 2

力学模型 2

动态模拟 2

卫星 2

地铁火灾 2

建模仿真 2

模拟 2

模糊控制 2

绿色化工 2

能源 2

展开︾

检索范围：

排序：展示方式：

Quantitative analysis of microplastics in coastal tidal-flat reclamation in Dongtai, China

《环境科学与工程前沿（英文）》 2022年第16卷第8期 doi: 10.1007/s11783-022-1528-5

摘要：

• Reclamation projects are important disturbances on microplastic risk in coasts.

关键词： Coastal reclamation Engineering geotextiles Soil microplastics Weathering simulation Marine emission

HTML PDF 收藏

Simulate oil spill weathering with system dynamic model

Aihaiti KASIMU, Junran DONG, Yuan BIAN, Desheng WU

《工程管理前沿（英文）》页码 696-696 doi: 10.1007/s42524-019-0060-1

摘要： Numerous oil spill fate and trajectory models have been recently developed to predict oil spill weathering processes. However, these models separately predicted the fate of spilled oil and the change in oil properties. A system dynamic model is thus developed based on the most significant oil weathering processes, which include spreading, evaporation, dispersion into the water bulk, emulsification, and changes in viscosity and density. We employ differential equations to describe these main oil weathering processes, which vary and have different effects on each other. Oil density and viscosity are functions of evaporation and emulsification and change over time. Oil evaporation is the most important process and removes most of the spilled oil from sea surface. Considering the main oil weathering processes, our model provides a different method of predicting the fate of oil and changes in oil properties. The Alaska North Slope is selected as a case study, and the estimated fractions of evaporation are 19% and 16% at 273 K and 283 K, respectively, within 240 h. Simulation results of oil properties and fates are also presented in this study.

关键词： oil spill weathering modeling system dynamics

HTML PDF 收藏

wood dust type on mechanical properties, wear behavior, biodegradability, and resistance to natural weathering

Sawan KUMAR, Ajitanshu VEDRTNAM, S. J. PAWAR

《结构与土木工程前沿（英文）》 2019年第13卷第6期页码 1446-1462 doi: 10.1007/s11709-019-0568-9

摘要： The present work reports the inclusion of different proportions of Mango/Sheesham/Mahogany/Babool dust to polypropylene for improving mechanical, wear behavior and biodegradability of wood-plastic composite (WPC). The wood dust (10%, 15%, 20% by weight) was mixed with polypropylene granules and WPCs were prepared using an injection molding technique. The mechanical, wear, and morphological characterizations of fabricated WPCs were carried out using standard ASTM methods, pin on disk apparatus, and scanning electron microscopy (SEM), respectively. Further, the biodegradability and resistance to natural weathering of WPCs were evaluated following ASTM D5338-11 and ASTM D1435-99, respectively. The WPCs consisting of Babool and Sheesham dust were having superior mechanical properties whereas the WPCs consisting of Mango and Mahogany were more wear resistant. It was found that increasing wood powder proportion results in higher Young’s modulus, lesser wear rate, and decreased stress at break. The WPCs made of Sheesham dust were least biodegradable. It was noticed that the biodegradability corresponds with resistance to natural weathering; more biodegradable WPCs were having the lesser resistance to natural weathering.

关键词： wood-plastic composites mechanical testing wear biodegradability injection molding weathering

HTML PDF 收藏

Retraction Note to: Simulate oil spill weathering with system dynamic model

Aihaiti Kasimu, Junran Dong, Yuan Bian, Desheng WU

《工程管理前沿（英文）》页码 695-695 doi: 10.1007/s42524-020-0120-6

HTML PDF 收藏

wood dust type on mechanical properties, wear behavior, biodegradability, and resistance to natural weathering

《结构与土木工程前沿（英文）》 2021年第15卷第4期页码 1071-1071 doi: 10.1007/s11709-021-0736-6

HTML PDF 收藏

从系统仿真到领域仿真--仿真研究活动的扩展

2020年11月28日

关键词：仿真技术

微合金钢回顾与展望

王仪康

《中国工程科学》 2000年第2卷第2期页码 77-82

摘要：

近几年来，包括我国在内的全球主要国家对钢材需用量同其国民经济产值有明显对应关系，钢材重新被确认为材料支柱。原因是经过高技术改造，钢铁工业发生了根本变化，推出了很多性能优越的“高技术钢材”，促进了相关工业的发展。微合金钢就是这些“高技术钢材”中用量最大的一种。在过去十年，我国针对大型露天矿重型设备、高压输送管线和制造运输集装箱需要发展微合金钢的经验表明，它是在高技术条件下生产的高经济效益钢材。展望21世纪，微合金钢由于有利于环境保护又有技术发展深度，在我国高压输气管线、造船和建筑钢结构方面还会有进一步发展。应列为创新项目，重点扶植、注意跟踪、及时开发，以带动钢铁工业技术改造。

关键词：微合金钢控制轧制管线钢板耐候钢板 SUF钢板环境保护材料

HTML PDF 收藏

仿真技术发展及应用

王子才

《中国工程科学》 2003年第5卷第2期页码 40-44

摘要：

从仿真技术的发展、成熟、再发展的观点论述了它的发展过程。介绍了仿真技术在国民经济各个领域中的应用。分析了国内外仿真技术水平及现状，展望了仿真技术的发展趋势。

关键词：仿真技术系统仿真半实物仿真分布交互仿真

HTML PDF 收藏

Numerical simulation of benzene transport in shoreline groundwater affected by tides under different

《环境科学与工程前沿（英文）》 2022年第16卷第5期 doi: 10.1007/s11783-022-1540-9

摘要：

● An approach for assessing the transport of benzene on the beach was proposed.

关键词： Numerical simulation Benzene Transport and fate Shoreline Groundwater Tide

HTML PDF 收藏

Numerical simulation of micro scale flowing and boiling

Wen WANG, Rui ZHUAN,

《能源前沿（英文）》 2009年第3卷第4期页码 396-401 doi: 10.1007/s11708-009-0049-2

摘要： Numerical simulations of flowing and boiling in micro channels are presented, including the modeling of bubble dynamics of nucleate boiling, and a description of the interface of two phases with the volume-of-fluid (VOF). The two calculated cases are compared with related experimental data in literature. Some simulated results are found corresponding well to the experimental data. The simulated results also show the details of 3-dimensional heat transfer and the flow in micro channels, which are helpful to the investigation of the mechanism of two-phase heat transfer and flow in micro channels.

关键词： volume-of-fluid (VOF) micro channel nucleate boiling bubble dynamics simulation

HTML PDF 收藏

CFD simulation on membrane distillation of NaCl solution

Zhaoguang XU, Yanqiu PAN, Yalan YU

《化学科学与工程前沿（英文）》 2009年第3卷第3期页码 293-297 doi: 10.1007/s11705-009-0204-7

摘要： A computational fluid dynamics (CFD) simulation that coupled an established heat and mass transfer model was carried out for the air-gap membrane distillation (AGMD) of NaCl solution to predict mass and heat behaviors of the process. The effects of temperature and flowrate on fluxes were first simulated and compared with available experimental data to verify the approach. The profiles of temperature, temperature polarization factor, and mass flux adjacent to the tubular carbon membrane surface were then examined under different feed Reynolds number in the computational domain. Results show that the temperature polarization phenomena can be reduced, and mass flux can be enhanced with increase in the feed Reynolds number.

关键词： membrane distillation computational fluid dynamics (CFD) simulation temperature polarization carbon membrane

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

Dynamic simulation based optimized design method of concrete production system for RCC dam

ZHAO Chunju, ZHOU Yihong

《结构与土木工程前沿（英文）》 2007年第1卷第4期页码 405-410 doi: 10.1007/s11709-007-0055-6

摘要： The construction system of roller compacted concrete (RCC) dam is running according to a series of connected procedures which are highly impacted and interacted consisting with the resource level. Therefore, a dynamic simulation mode

关键词： interacted dynamic simulation construction resource RCC

HTML PDF 收藏

Mechanism of ethanol/water reverse separation through a functional graphene membrane: a molecular simulation

《化学科学与工程前沿（英文）》 2023年第17卷第3期页码 347-357 doi: 10.1007/s11705-022-2246-z

摘要： Reverse-selective membranes have attracted considerable interest for bioethanol production. However, to date, the reverse-separation performance of ethanol/water is poor and the separation mechanism is unclear. Graphene-based membranes with tunable apertures and functional groups have shown substantial potential for use in molecular separation. Using molecular dynamics simulations, for the first time, we reveal two-way selectivity in ethanol/water separation through functional graphene membranes. Pristine graphene (PG) exhibits reverse-selective behavior with higher ethanol fluxes than water, resulting from the preferential adsorption for ethanol. Color flow mappings show that this ethanol-permselective process is initiated by the presence of ethanol-enriched and water-barren pores; this has not been reported in previous studies. In contrast, water molecules are preferred for hydroxylated graphene membranes because of the synergistic effects of molecular sieving and functional-group attraction. A simulation of the operando condition shows that the PG membrane with an aperture size of 3.8 Å achieves good separation performance, with an ethanol/water separation factor of 34 and a flux value of 69.3 kg∙m^‒2∙h^‒1∙bar^‒1. This study provides new insights into the reverse-selective mechanism of porous graphene membranes and a new avenue for efficient biofuel production.

关键词： reverse separation graphene membrane ethanol/water separation molecular simulation

HTML PDF 收藏

Fault simulation of boiler heating surface ash deposition in a power plant system

Weiwei ZHANG, Huisheng ZHANG, Ming SU

《能源前沿（英文）》 2011年第5卷第4期页码 435-443 doi: 10.1007/s11708-011-0162-x

摘要： The simulation model of a power generation system was developed based on EASY5 simulation platform. The performances of the power plant under the conditions of the furnace slagging and ash deposition of the heating surfaces in the boiler were simulated. The results show that the simulation model can reasonably reflect the characteristics of the power plant when each component is under fault conditions. Through fault simulation, the change of the performance parameters can be obtained, which can be used in fault diagnosis system as the diagnosis criterion for expert system.

关键词： boiler slagging ash deposition fault simulation