Results 31 to 40 of about 6,721 (239)
Carbon emission assessment of tunnel infrastructures: From construction to operation
Deep Underground Science and Engineering, EarlyView.This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long +4 more
wiley +1 more source
CHOOSING RAILWAY VEHICLES FOR CARRYING PASSENGERS [PDF]
TRANSPORT, 2010 To carry passengers, diesel and electrical trains, railcars, passenger carriages and hauled locomotives are used in AB ‘Lietuvos geležinkeliai’ (Lithuanian Railways). In certain sections, the number of passengers is very low (e.g. several or up to twenty passengers per 24 hours), and therefore rolling stock is used inefficiently. For this reason, it is
openaire +3 more sources
Developing a universal tunnel span classification from global tunnel databases
Deep Underground Science and Engineering, EarlyView.A universal tunnel span classification system is introduced that incorporates tunnel span, cross‐sectional area, typical tunnel types, and intended uses. Representative flatness ratio values are also provided for each span class. The classification is derived from a comprehensive database of 450 tunnel profiles from 47 countries.
Simon Heru Prassetyo +8 more
wiley +1 more source
Dynamic Analysis of a 4-Axles Railway Vehicle Model
Communications, 2009 The paper deals with using dynamic simulations in fields of construction, production and operating of railway vehicles. It contained process of dynamics solution of choices referent vehicle by the help special solution software - MSC ADAMS.
Zuzana Ondrova
doaj +1 more source
Applied Sciences, 2023 In recent years, the vehicle-based indirect Structural Health Monitoring (iSHM) method has been increasingly used to identify the dynamic characteristics of railway bridges during train crossings, and it has been shown that this method has several ...
Michael Reiterer +4 more
doaj +1 more source
Fire and Materials, Volume 49, Issue 3, Page 329-346, April 2025.ABSTRACT This study investigates the postfire mechanical properties of epoxy glass‐fiber reinforced composites (EP GFRCs) using increasing concentrations of ammonium polyphosphate (APP) and inorganic silicate (InSi) to modify the char and fire residue.
Sruthi Sunder +5 more
wiley +1 more source
On the Lateral Vibration of Railway Vehicles.
Journal of the Society of Mechanical Engineers, 1942 巻ばね、板ばね及び搖枕釣を有する台車を備へた車輌を考へ、蛇行動なる左右的強制振動を受ける時の左右傾斜振動の運動方程式を觧いて、現在の国有鉄道車輌の左右振動に関する完全觧を得た。現在国有鉄道にて採用してゐる2軸台車に就て搖枕釣の作用を考察しようとし左右傾斜動の自己振動周期を求めた処在耒の傾斜釣の時は0.76及び1.82sにて、垂直釣とする時は0.80及び1.73sである。而して蛇行動による左右強制振動が共鳴する速度は傾斜釣にては31.8及び76.1km/hなるに対し、垂直釣にては33.4及び72.2km/hとなり、両者大差はないが速度による搖枕釣の搖れ角を考察するに低速度にては傾斜釣の方小であるが高速度にては大になる傾向あることは理論的計算及び実驗的結果に依て認められた。
openaire +2 more sources
Vehicle Fires: Significant Fire Hazard in Transportation Infrastructure
Fire and Materials, EarlyView.ABSTRACT Vehicle flammability poses a critical threat to transportation infrastructure, with recent fires in depots, tunnels, and car parks highlighting systemic vulnerabilities. These incidents often result in the total loss of vehicles and buildings, revealing the inadequacy of current fire safety standards for vehicle materials.
Anja Hofmann‐Böllinghaus +2 more
wiley +1 more source
Aktív hűtés hatásainak vizsgálata 3D nyomtatás esetén
International Journal of Engineering and Management Sciences, 2022 A 3D nyomtatás egyre szélesebb körben alkalmazott gyártási eljárás. A gépek és anyagok fejlődésével egyre több ember számára hozzáférhető ez a technológia, egyre egyszerűsödik az alkalmazása.
Péter Ficzere
doaj +1 more source
The Journal of Wildlife Management, EarlyView.Fine‐scale population variables better explain roadkill patterns in natterjack toads (Epidalea calamita) than habitat proxies, with mortality driven mainly by local abundance, reduced by roadside embankments, and decreasing as the season advanced. Despite high roadkills, population viability analyses indicate no immediate extinction risk under current ...
A. Iglesias‐Donoso +4 more
wiley +1 more source