Imperial College London
Portrait Picture

Dr Adam Jan Sadowski

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Lecturer
 
 
 
//

Contact

 

+44 (0)20 7594 3065a.sadowski Website

 
 
//

Location

 

318Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Boyez:2018:10.1016/j.tws.2018.05.019,
author = {Boyez, A and Sadowski, AJ and Izzuddin, BA},
doi = {10.1016/j.tws.2018.05.019},
journal = {Thin-Walled Structures},
pages = {535--549},
title = {A ‘boundary layer’ finite element for thin multi-strake conical shells},
url = {http://dx.doi.org/10.1016/j.tws.2018.05.019},
volume = {130},
year = {2018}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multi-strake  cylindrical  and  conical  shells  of  revolution  are  complex  but  commonplace industrial structures which are composed of multiple segments of varying wall thickness. They find application as tanks, silos, circular hollow sections, aerospace structures and wind turbine support towers, amongst others. The modelling of such structures with classical finite elements interpolated  using  low  order  polynomial  shape  functions  presents  a  particular  challenge, because many elements must be sacrificed solely in order to accurately represent the regions oflocal compatibility bending, so-called ‘boundary layers’, near shell boundaries, changes of wall thickness and  at other discontinuities. Partitioning schemes must be applied to localise mesh refinement within the boundary layers and avoid excessive model runtimes, a particular concern in incremental nonlinear analyses of large models where matrix systems are handled repeatedly.  In a previous paper, the authors introduced a novel  axisymmetric cylindrical shell finite element that was enriched with transcendental shape functions to capture the bending boundary layer exactly, permitting significant economies in the element and degrees of freedom count, mesh design  and  model  generation  effort.  One  element  is sufficient  per  wall  strake.  This  paper extends  this  work  to  conical  geometries,  where  axisymmetric  elements  enriched  with  Bessel functions accurately capture the bending boundary layer for both ‘shallow’ and ‘steep’ conical strakes, which are characterised by interacting and independent boundary layers, respectively. The  bending  shape  functions  are  integrated  numerically,  with  several  integration  schemes investigated for accuracy and efficiency. The potential of the element is illustrated through a stress analysis of a real 22-strake metal wind turbine support tower under self-weight. The work is part of a wider project to desig
AU  - Boyez,A
AU  - Sadowski,AJ
AU  - Izzuddin,BA
DO  - 10.1016/j.tws.2018.05.019
EP  - 549
PY  - 2018///
SN  - 0263-8231
SP  - 535
TI  - A ‘boundary layer’ finite element for thin multi-strake conical shells
T2  - Thin-Walled Structures
UR  - http://dx.doi.org/10.1016/j.tws.2018.05.019
UR  - http://hdl.handle.net/10044/1/60233
VL  - 130
ER  -
Download