Sökning: "maintenance intervals"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden maintenance intervals.

1. 1. Optimization of track geometry maintenance : a study of track geometry degradation to specify optimal inspection intervals

   Författare :Iman Arasteh khouy; Per-Olof Larsson-Kråik; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance;

   Sammanfattning : Railway infrastructure is a complex system which comprises different subsystems. Long useful life span is one of the important aspects of this prime mode of transport. The useful life length of its assets is highly dependent on the maintenance and renewal strategy used during its life cycle. LÄS MER

3. 2. Leveraging Data-Driven and Alignment Techniques for Optimal Railway Track Maintenance Scheduling

   Författare :Mahdi Khosravi; Alireza Ahmadi; Uday Kumar; Iman Soleimanmeigouni; Anders Ekberg; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway tracks; degradation; maintenance; tamping; track geometry; planning and scheduling; alignment; Operation and Maintenance Engineering; Drift och underhållsteknik;

   Sammanfattning : The railway infrastructure plays a pivotal role in fostering economic growth and poverty alleviation. Over time, these infrastructures deteriorate due to aging and usage, compromising their functionality. Given their crucial socioeconomic significance and vast scale, ensuring their functionality and availability is paramount. LÄS MER

4. 3. Predictive Models for Railway Track Geometry Degradation

   Författare :Iman Soleimanmeigouni; Alireza Ahmadi; Nalinaksh S. Vyas; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Data-driven models; Degradation; Inspection; Maintenance; Predictive analytics; Tamping; Track geometry; Railway infrastructure; RAMS; Drift och underhållsteknik; Operation and Maintenance;

   Sammanfattning : Railways are a vital and effective means of mass transportation and play a vital role in modern transportation and social development. The benefits of the railway compared to other transportation modes are a high capacity, high efficiency and low pollution, and owing to these advantages, railways are nowadays experiencing a higher demand for the transportation of passengers and goods. LÄS MER

5. 4. Weekly planning of hydropower in systems with large volumes of varying power generation

   Författare :Charlotta Ahlfors; Mikael Amelin; Magnus Brolin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydropower; literature review; weekly planning; low carbon operation; maintenance scheduling; preventive maintenance; mixed integer linear programming; dynamic programming; cascaded river systems; value of stored water; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Hydropower is the world’s largest source of renewable electricity generation. Hydropower plants with reservoirs provide flexibility to the power systems. LÄS MER

7. 5. Användning av tillgängliga klimat- och miljödata vid livslängdsbedömningar av byggnader

   Författare :Kjell Westberg; KTH; []
   Nyckelord :service life planning; degradation environment; degradation agents; transformation; buildings; structures; maintenance intervals; meteorological data; climate data; environmental data; air pollutions;

   Sammanfattning : Since there is a demand to achieve improved precision ofestimations of the service life of a building and itsmaintenance intervals, in international organisations tasks arerunning to establish methods, models and standards for servicelife estimations. However, exact estimations are not feasibleat a reasonable cost. LÄS MER