Procedia IUTAM最新文献_第5页

Stabilizability of Mechanical Systems Subjected to Digital PIDA Control 数字PIDA控制下机械系统的稳定性

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-08-30 DOI: 10.1016/j.piutam.2017.08.017

Dávid Lehotzky, Tamás Insperger

引用次数: 1

Storm surge prediction: present status and future challenges 风暴潮预测:现状与未来挑战

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-10-13 DOI: 10.1016/j.piutam.2017.09.002

Jiachun Li , Bingchuan Nie

{"title":"Storm surge prediction: present status and future challenges","authors":"Jiachun Li , Bingchuan Nie","doi":"10.1016/j.piutam.2017.09.002","DOIUrl":"10.1016/j.piutam.2017.09.002","url":null,"abstract":"<div><p>In the current review, the most pessimistic events of the globe in history are addressed when we present severe impacts caused by storm surges. During previous decades, great progresses in storm surge modeling have been made. As a result, people have developed a number of numerical software such as SPLASH, SLOSH etc. and implemented routine operational forecast by virtue of powerful supercomputers with the help of meteorological satellites and sensors as verification tools. However, storm surge as a killer from the sea is still threatening human being and exerting enormous impacts on human society due to economic growth, population increase and fast urbanization. To mitigate the effects of storm surge hazards, integrated research on disaster risk (IRDR) as an ICSU program is put on agenda. The most challenging issues concerned such as abrupt variation in TC’s track and intensity, comprehensive study on the consequences of storm surge and the effects of climate change on risk estimation are emphasized. In addition, it is of paramount importance for coastal developing countries to set up forecast and warning system and reduce vulnerability of affected areas.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"25 ","pages":"Pages 3-9"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.09.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55249504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Comparing Nonlinear Free Vibrations of Timoshenko Beams with Mechanical or Geometric Curvature Definition 比较力学曲率和几何曲率定义下Timoshenko梁的非线性自由振动

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-03-22 DOI: 10.1016/j.piutam.2017.03.006

Stefano Lenci , Francesco Clementi , Giuseppe Rega

引用次数: 27

The recent development of storm surge modeling in Taiwan 台湾风暴潮模拟的最新发展

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-10-13 DOI: 10.1016/j.piutam.2017.09.011

Tso-Ren Wu , Yu-Lin Tsai , Chuen-Teyr Terng

{"title":"The recent development of storm surge modeling in Taiwan","authors":"Tso-Ren Wu , Yu-Lin Tsai , Chuen-Teyr Terng","doi":"10.1016/j.piutam.2017.09.011","DOIUrl":"10.1016/j.piutam.2017.09.011","url":null,"abstract":"<div><p>Storm surge is an important issue in Taiwan because our country is located at the typhoon prone area and surrounded by the Pacific Ocean and the Taiwan Strait. People live at coastal areas need to pay attention to the damages of storm surge, especially the inundation during typhoon’s duration. Therefore, the accurate and highly efficient operational storm surge system is required to provide not only the information of water elevations but also potential inundation areas. The large computational domain should be adopted to cover the complete typhoon life-cycle, and the atmospheric model and tidal model are expected to be coupled inside. COMCOT-SS (COrnell Multi-grid Coupled Tsunami Model – Storm Surge) fulfils above-mentioned requirements and solves nonlinear shallow water equations with multi-scale wave propagations and inundation calculation. In this study, 2015 category-5 Typhoon Soulik is chosen for model validation, and the results are in a good agreement with observed data. Coastal inundation induced by Typhoon Soulik is also simulated to study the variation of storm tides and tides. By a series of strict validations and operational experiments, COMCOT storm surge operational system has been the official forecasting model at Central Weather Bureau, Taiwan since July, 2016, and has successfully predicted the storm surges induced by 2016 category-5 Typhoon Nepartak.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"25 ","pages":"Pages 70-73"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.09.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47360073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Modeling of Biofilm Growth on Ager Substrate Using the Extended Finite Element Method 用扩展有限元法模拟Ager基质上生物膜的生长

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-08-30 DOI: 10.1016/j.piutam.2017.06.003

Xianlong Zhang , Xiaoling Wang , Qingping Sun

引用次数: 2

Mechanics of Materials Creation: Nanotubes, Graphene, Carbyne, Borophenes 材料创造的力学:纳米管、石墨烯、碳炔、硼罗芬

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-06-22 DOI: 10.1016/j.piutam.2017.03.032

John M. Alred, Nitant Gupta, Mingjie Liu, Zhuhua Zhang, Boris I. Yakobson

{"title":"Mechanics of Materials Creation: Nanotubes, Graphene, Carbyne, Borophenes","authors":"John M. Alred, Nitant Gupta, Mingjie Liu, Zhuhua Zhang, Boris I. Yakobson","doi":"10.1016/j.piutam.2017.03.032","DOIUrl":"10.1016/j.piutam.2017.03.032","url":null,"abstract":"<div><p>In this article, we provide brief overview of how mechanics and computations play a role in understanding materials growth, creating new low-dimensional materials and exploring structural defects. First, we introduce a concept of screw dislocation for describing carbon nanotube growth and derive a kinetic relationship between growth rate and chiral angle. Deeper analysis of the subtle balance between the kinetic and thermodynamic views reveals sharply peaked distribution of near-armchair nanotubes, explaining puzzling (n, n-1) types observed experimentally. A combination of <em>ab initio</em> calculations and Monte Carlo models further explains the low symmetry shapes of graphene on substrates. Being monoatomic chains of carbon, carbynes are shown to be strong yet flexible, and undergo metal-semiconductor transition under tension, offering promising innovations for future nanotechnology. We then reveal how metal substrates could facilitate the formation of boron monolayers whose bulk counterparts are non-layered and lower in energy. Further remarks are given to High Burger's vector graphene defects called D-loops and interfaces in hybrid graphene-BN materials, both with significant out-of plane distortion and impact on the mechanical properties. All of these computationally modeled systems have significant implications for the future use of these nanomaterials.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"21 ","pages":"Pages 17-24"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.03.032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55246082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Storm waves during Typhoon Cobra (Halsey’s typhoon) in December 1944 1944年12月，台风眼镜蛇(哈尔西台风)期间的风暴波

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-10-13 DOI: 10.1016/j.piutam.2017.09.007

Byung Ho Choi , Kyeong Ok Kim , Jin-Hee Yuk

{"title":"Storm waves during Typhoon Cobra (Halsey’s typhoon) in December 1944","authors":"Byung Ho Choi , Kyeong Ok Kim , Jin-Hee Yuk","doi":"10.1016/j.piutam.2017.09.007","DOIUrl":"10.1016/j.piutam.2017.09.007","url":null,"abstract":"<div><p>A coupled-process based tide-wave-surge model has been used to simulate Typhoon Cobra in December 14-19, 1944, also best known as the Typhoons of 1944 or Halsey’s Typhoon. The typhoon information of location and direction that were provided to admiral Halsey was not accurate and the third fleet operating 480 km east of Luzon in the Philippine Sea sailed into the center of the typhoon. As a result, the ship was wrecked by strong winds of 87 kt, lowest air pressure of 907 hPa and very high seas. This typhoon resulted in the establishment of Joint Typhoon Warning Center (JTWC) in Hawaii. The model was constructed with fine-mesh finite element model covering the whole South China Sea with inclusion of the Java Sea and adjacent marginal seas and the Philippine Sea. Approximate mesh sizes in the region of interest were formulated as a few tens of meters and the bathymetry of the tidal flat area was described, thus enabling a detailed representation of component in tidal characteristics in the modelled tidal regime. Typhoon and meteorological forcing inputs for the period 13-20, December 1944 are prepared via blending of ECMWF-20C as background meteorological conditions and Holland type vortex typhoon fields. The water elevation determined from the estimation of the Japanese National Astronomical Observatory (NAOTIDE) database was imposed at the tidal open boundary. Time-series outputs of storm waves are produced showing maximum significant wave heights of 12-15 m along the typhoon track.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"25 ","pages":"Pages 44-51"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.09.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55249688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sheet flow measurement in the north passage of Yangtze estuary with pedestal based synchronous field survey system 基于台座式同步野外测量系统的长江口北槽片流测量

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-10-13 DOI: 10.1016/j.piutam.2017.09.021

Xiao Jia , Hua-Cong Huang , Yuan-Ye Wang , Hua Liu

{"title":"Sheet flow measurement in the north passage of Yangtze estuary with pedestal based synchronous field survey system","authors":"Xiao Jia , Hua-Cong Huang , Yuan-Ye Wang , Hua Liu","doi":"10.1016/j.piutam.2017.09.021","DOIUrl":"10.1016/j.piutam.2017.09.021","url":null,"abstract":"<div><p>In order to measure sheet flow near the bottom in the north passage of Yangtze Estuary during the typhoon, a submerged synchronous field survey system composited of Nortek AquaPro, Nortem AquaPro HR, AWAC and OBS 3+ was equipped on a pedestal based structure. The system was used to survey sheet flow field during the flooding season in 2015. The pedestal base synchronous field survey system can give reasonable estimation about stability of itself, and also capture simultaneously the wave climate as well as the current feature and the sediment concentration near the bottom. Analyzing the data collected by the system, it is found that the tidal current dominates the sedimentation concentration near the bottom in the Yangtze Estuary without waves, and the only peak value of suspended sediment concentration occurs at the fall slack time. The suspended sediment concentration above 50cm to the bottom is usually not larger than 15kg/m<sup>3</sup>, and it is not significantly correlated with the wave. When typhoon happens, the suspended sediment concentration increases significantly below 30cm to the bottom. There are two peaks of the suspended sediment concentration at the spring slack and the fall slack time respectively.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"25 ","pages":"Pages 141-148"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.09.021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55249980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics of Cutting Near Double Hopf Bifurcation 双Hopf分岔附近的切割动力学

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-08-30 DOI: 10.1016/j.piutam.2017.08.016

Tamás G. Molnár , Zoltán Dombóvári , Tamás Insperger , Gábor Stépán

引用次数: 3

Noise-induced Resonances in a Periodic Potential Driven by Correlated Noises 由相关噪声驱动的周期电势中的噪声诱发共振

Procedia IUTAM Pub Date : 2017-01-01 Epub Date: 2017-08-30 DOI: 10.1016/j.piutam.2017.08.035

Yanfei Jin , Wenxian Xie , Kaihe Liu

引用次数: 4