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KURSPLAN

Dimensionering av konstruktioner för förnybara energisystem 5 Högskolepoäng

Design for renewable energy systems
Avancerad nivå, S7007B
Version
Kursplan gäller: Vår 2016 Lp 3 - Tills vidare
Vald version visar för vilken termin och läsperiod som denna kursplanen gäller för. Senaste version visas först.


Utbildningsnivå
Avancerad nivå
Fördjupningskod
A1N
Betygskala
U G#
Ämne
Stålbyggnad
Ämnesgrupp (SCB)
Byggteknik

Behörighet

Vara antagen till Suscos programmet


Urval

Urvalet grundas på 20-285 högskolepoäng



Mål/Förväntat studieresultat
The aim of this course is to give students an understanding of the behaviour of steel tubular towers for wind turbines, using analytical and numerical methods and to practice design calculations. In addition other lattice towers and different types of concrete towers combination will be discussed The Eurocodes are used throughout the course to calculate the structural resistance. The “International version of the codes” will be used in the course and students will have opportunity to borrow prepared compendiums which will be returned afterwards. This version of the Eurocodes is prepared by the international experts and is not nationally adjusted. The course describes different part of the tower: foundation, instability phenomena which are limiting for the resistance of a tower, different types of connections, as well as load analysis and safety strategy based on partial safety factors, tower production and maintenance. Understanding of economical and technical aspect involved in planning, design and construc ion of the wind farm, onshore and offshore will be provided. The aim is to have an understanding of theoretical background and engineering (design) models, and the resistance according to codes. Design concerning instability, assembling connections, foundations, design of details prone to fatigue load are based on theoretical models and design standards for win tower certification and Eurocodes. Exercises using FE method, using commercially available software, are optional and may be performed to compare analytical and numerical results. Previous experience in FE analysis is not requested but it is advantageous.

Kursinnehåll

Seven topics, listed below are covered in the course. Design loads, including background of the approximation of external loads to design values of the cross‐section forces, and resistance of the tower, including the foundation are main topics of the course. Basic
theory of practical methods used to approximate cyclic loading is given. Assembling connections of the towers are considered focusing on design of bolts. One of the most important parts of structural design is to identify the engineering model and define different failure modes that may occur for a chosen design load of a tower. The design resistance is checked for each failure mode. In the compulsory assignments students practice use of the structural codes and engineering models for calculation of cross section forces, critical forces and the design resistance. Elastic stability of circular cylindrical shell, considering axial load and combination of axial load and bending moment will be given. Postbuckling behaviour of a perfect and imperfect shell will analysed to understand background of the design rules. Finite element method is used to calculate resistance of the tower for axial force and combination of axial force and bending moment, and to estimate design force in the bolts of the flange connection (“unsymmetrical T‐stub connection)


Genomförande
Frontal lessons, seminar  and home work

Examination
Approved compulsory assignments will be necessary to prepare a public presentation at the end of the course on the work performed during the course.
Grading system. Passed or not passed. A certificate awarding ECCS credits after the course accomplishment may be provided upon the request.

Examinator
Ove Lagerqvist

Litteratur. Gäller från Höst 2012 Lp 1 (Kan ändras fram till 10 veckor innan studiestart)
Tutorial examples will be prepared in due time in format of handouts in following areas sustainability assessment, costs analysis, shell stability, flange connection‐one half of the T‐stub. Peer reviewed papers from journals and different web sources will be provided. Background material of research projects developed by the teachers Choosen chapters related to selected topics of theory of stability and connections
Eurocodes
ECCS recommendations
Guidelines,
Standards

Kursgivare
Institutionen för samhällsbyggnad och naturresurser

Prov
ProvnrTypHpBetyg
0001Tentamen3.0U G#
0002Inlämningsuppgifter2.0U G#

Kursplanen fastställd
av Eva Gunneriusson 2012-03-14

Reviderad
av Eva Gunneriusson 2015-11-04