Dr Hui Long

BEng, MSc, PhD, CEng, FIMechE, FHEA

Reader in Mechanical Engineering

Department of Mechanical Engineering
Sir Frederick Mappin Building
Mappin Street
Sheffield
S1 3JD
UK

Telephone: +44(0)114 2227759

Email : h.long@sheffield.ac.uk

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Profile

Dr Long joined the University of Sheffield as a Reader in 2012. Before this she was a senior lecturer at Durham University, where she worked from 2003 to 2012. Dr Long received her BEng, MSc and PhD degrees in Mechanical Engineering from Chongqing University in China. She then worked as a lecturer and then an associate professor in the State Key Laboratory of Mechanical Transmissions, China, for nine years. From 1996 to 2003 she worked as a research associate and research fellow at the University of Strathclyde, the University of Wales Swansea and Brunel University.

Research Areas

Dr Long's current research is centred on two broad areas, wind energy and advanced manufacturing technology. Within the area of wind energy her work has been focused on investigating wind turbine gearbox reliability, stochastic loading, statistical characteristics of operational conditions and their effects on premature failures of key mechanical components.

In the area of manufacturing, her work has involved the numerical modelling of metal forming processes, including extrusion and spinning, and welding processes using thermo-elastic-plastic finite element methods. The aim is to prevent material failures by optimising the process design and to achieve a better product quality and dimensional accuracy.

Current Research Themes

Wind turbine technology:

• Stochastic loading and statistical characteristics of wind turbine field operational conditions;
• Reliability-centered design and failure analysis for wind turbine gearboxes;
• Probabilistic finite element modelling of gear tooth surface micropitting.

Advanced manufacturing technology:

• Non-linear finite element analysis and modelling of metal forming and welding processes;
• Process optimisation for material failure prevention in metal spinning;
• Springback control for better dimensional accuracy in metal spinning.

Research Grants

Current Projects:

• Implementation and demonstration of SCADA-based wind turbine monitoring to improve reliability, EPSRC Impact, 2011-2012, PI.
• Future reliable renewable energy conversion systems and networks, EPSRC, 2009-2012, Co-I.
• Advanced design methodologies for wind turbine gearboxes - Visiting Fellowship of Chongqing University. Ministry of Education, China, 2010-2013, PI.

Recently Completed Projects (since 2008):

• Design innovation for multidisciplinary engineering applications. The Royal Academy of Engineering, 2012-2013, PI.
• Lightweight offshore wind turbine gearbox feasibility study. Northern Wind Innovation Project, 2010-2011, PI.
• Reliability focused research on optimising wind energy systems design, operation and maintenance. EU FP7 Collaborative, 2008-2011, Co-I.
• Wind turbine gearbox stochastic loading prediction for failure detection and prevention. Durham Energy Institute/One Northest, 2011, PI.
• Effective experimentation and simulation techniques for metal spinning. TSB KTP, 2008-2010, PI.

Selected Publications (since 2008)

Refereed Journal Papers:

• Prediction of wind turbine gear micropitting under variable load and speed conditions using ISO/TR 15144-1,
  Al-Tubi, I. S. & Long, H. (2012)
  Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, in press.
  Available online


• Roller path design by tool compensation in multi-pass conventional spinning,
  Wang, L. & Long, H. (2013),
  Materials and Design, 46, pp. 645-653,
  Available online


• Monitoring wind turbine gearboxes,
  Feng, Y., Qiu, Y., Crabtree, C. J., Long, H. & Tavner, P. J. (2012),
  Wind Energy, Online.
  Available online


• Evaluation of dual axis fatigue testing of large wind turbine blades,
  Greaves, P. G., Dominy, R. G., Ingram, G. L., Long, H. & Court, R. (2012),
  Proceedings of the Institution of Mechanical Engineering Part C: Journal of Mechanical Engineering Science, 226(7), pp. 1693-1704.
  Available online


• Finite element modelling and optimisation of net-shape metal forming processes with uncertainties,
  Ou, H., Wang, P., Lu, B. & Long, H. (2012),
  Computers and Structures, 90-91, pp. 13-27.
  Available online


• A study of effects of roller path profiles on tool forces and part wall thickness variation in conventional metal spinning,
  Wang, L. & Long, H. (2011),
  Journal of Materials Processing Technology, 211(12), pp. 2140-2151.
  Available online


• Die shape optimisation for net-shape accuracy in metal forming using direct search and localised response surface methods,
  Lu, B., Ou, H. & Long, H. (2011),
  Structural and Multidisciplinary Optimization, 44(4), pp. 529-545.
  Available online


• Finite element analysis and experimental investigation on deformation mechanism of non-axisymmetric tube spinning,
  Xia, Q., Cheng, X., Long, H. & Ruan, F. (2012),
  International Journal of Advanced Manufacturing Technology, 59(1-4), pp. 263-272.
  Available online


• Effects of roller feed ratio on wrinkling failure in conventional spinning,
  Wang, L. Long, H., Ashley, D., Roberts, M. & White P. (2011),
  Proceedings of the Institution of Mechanical Engineers: Part B Journal of Engineering Manufacture, 225(11), pp. 1999-2006.
  Available online


• Improving gearbox design and analysis for offshore wind turbines,
  Long, H., Wu, J. & Firth, A. (2011),
  Applied Mechanics and Materials, 86, pp. 309-312.


• Investigation of material deformation in multi-pass conventional spinning,
  Wang, L & Long, H. (2010),
  Materials and Design, 32(5), pp. 2891-2899.
  Available online


• Early operational experience of UK round 1 offshore wind farms,
  Feng, Y., Tavner, P. & Long, H. (2010),
  Proceedings of the Institution of Civil Engineers: Energy, 163(4), pp. 167-181.
  Available online


• Analysis of single-pass conventional spinning by Taguchi and finite element methods,
  Wang, L., Long, H., Ashley, D., Roberts, M. & White, P. (2010),
  Steel Research International, 81(9), pp. 974-977.


• Prediction of welding distortion in butt joint of thin plates,
  Long, H., Gery, D., Carlier, A. & Maropoulos (2009),
  Materials and Design, 30(10), pp. 4126-2135.
  Available online


• Analysis of conventional spinning process of a cylindrical part using finite element method,
  Hamilton, S. & Long, H. (2008),
  Steel Research International, 79(1), pp. 632-639.


• Case study in design: Generation of design knowledge for vehicle subframes based on finite element simulation,
  Long, H., Fanourakis, A. & Oliver, P. (2008),
  In Methods and Tools for Effective Knowledge Life-Cycle-Management, eds. Bernard, A. & Tichkiewitch, S.,
  Berlin: Springer, pp. 447-462 (ISBN: 978-3-540-78430-2).

Referred Conference Papers:

• A study on mechanics of conventional spinning using a truncated hemispherical dome,
  Pell, S. & Long, H. (2012),
  Proceedings of the 14th Annual Conference on Metal Forming - Krakow, Poland, pp. 1359-1362.


• Tool force analysis in multi-pass conventional spinning by finite element simulation and experimental measurement,
  Long, H., Wang, L. & Jagger, P. (2011),
  Proceedings of the 10th International Conference on Technology of Plasticity - Germany, Sept 2011.


• Investigation of effects of roller path profiles on wrinkling in conventional spinning,
  Wang, L. & Long., H (2011),
  Proceedings of the 10th International Conference on Technology of Plasticity - Germany, Sept 2011.


• Fatigue analysis of wind turbine gearbox bearings using SCADA data and Miner's rule,
  Long, H., Wu, J., Matthew, F. & Tavner, P. J. (2011),
  The Scientific Proceedings of European Wind Energy Association Conference - Belgium, March 2011.


• Failure detection and diagnosis of WT gearbox with SCADA and CMS,
  Feng, Y., Qiu, Y., Crabtree, C., Long, H. & Tavner, P. J. (2011),
  The Scientific Proceedings of European Wind Energy Conference - Belgium, March 2011.


• Stress analysis of multi-pass conventional spinning,
  Wang, L. & Long, H. (2010),
  Proceedings of the 8th International Conference on Manufacturing Research - UK, Sept 2010.


• Reliability analysis and prediction of wind turbine gearboxes,
  Smolders, K., Long, H., Feng, Y. & Tavner, P. (2010),
  European Wind Energy Conference 2010 Scientific Track - Warsaw, Poland, April 2010.


• A design software tool for conceptual design of wind turbine gearboxes,
  Firth, A. & Long, H. (2010),
  European Wind Energy Conference 2010 Technical Track - Warsaw, Poland, April 2010.


• Using an FMEA method to compare prospective wind turbine design reliabilities,
  Tavner, P. J., Higgins, A., Arabian, H., Long, H. & Feng, Y. (2010),
  European Wind Energy Conference 2010 Technical Track - Warsaw, Poland, April 2010.


• Methodology and results of the Reliawind reliability field study,
  Wilkinson, M. R., Hendriks, B., Spinato, F., Gomez, E., Bulacio, H., Roca, J., Tavner, P., Feng, Y. & Long, H. (2010),
  European Wind Energy Conference 2010 Scientific Track - Warsaw, Poland, April 2010.