Research

Structural System ID & Model Updating

Field dynamic testing on an as-built structure usually provides modal properties that are different from these generated by a finite element (FE) model. To update the FE model parameters, optimization problems can be formulated to minimize the difference between experimental and simulated modal properties. Various FE model parameters can be selected as optimization variables for model updating, such as the elastic moduli of structural members, as well as stiffness values of support springs.

                 

Selected Publications

  1. Li, D., and Wang, Y. (2018). "Sparse sum-of-squares optimization for model updating through minimization of modal dynamic residuals," ASME Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems, in print.

  2. Dey S. S., Santana A., and Wang, Y. (2018). "New SOCP relaxation and branching rule for bipartite bilinear programs,Optimization and Engineering, in print.

  3. Li, D., Dong, X., Wang, Y. (2018). "Model updating using sum of squares (SOS) optimization to minimize modal dynamic residuals,Structural Control and Health Monitoring, 25(12): e2263.

  4. Dong, X., and Wang, Y. (2018). "Modal property difference formulations and optimization algorithm comparison towards FE model updating." Proceedings of SPIE, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring Denver, CO, USA, March 4-8, 2018.

  5. Dong, X., and Wang, Y. (2016). "A comparative study of frequency-domain finite element updating approaches using different optimization procedures." Proceeding of the 8th European Workshop on Structural Health Monitoring (EWSHM), Bilbao, Spain, July 5-8, 2016.

  6. Hong, Y., Liu, X., Dong, X., Wang, Y., and Pu, Q. (2016). "Experimental model updating using frequency response functions." Proceedings of SPIE, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 9803, Las Vegas, NV, USA, March 20-24, 2016.

  7. Zhu, D., Dong, X., and Wang, Y. (2016). "Substructure stiffness and mass updating through minimization of modal dynamic residuals." Journal of Engineering Mechanics, 142(5): 04016013.

  8. Zhu, D., Yi, X., and Wang, Y. (2016). "A local excitation and measurement approach for decentralized damage detection using transmissibility functions," Structural Control and Health Monitoring, 23(3): 487-502.

  9. Feng, L., Yi, X., Zhu, D., Xie, X.Y., and Wang, Y. (2015). "Damage detection of metro tunnel structure through transmissibility function and cross correlation analysis using local excitation and measurement," Mechanical Systems and Signal Processing, 60: 59-74.

  10. Dong, X., Zhu, D., and Wang, Y. (2015). "Substructure model updating with noisy measurements through a regularized modal dynamic residual approach." Proceedings of the 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII), Torino, Italy, July 1-3, 2015.

  11. Dong, X., Zhu, D., and Wang, Y. (2015). "Substructure location and size effects on decentralized model updating." Proceedings of SPIE, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 9435, San Diego, CA, USA, March 8-12, 2015.

  12. Zhu, D., Dong, X., and Wang, Y. (2014). "Substructure finite element model updating of a space frame structure by minimization of modal dynamic residual." Proceedings of the 6th World Conference on Structural Control and Monitoring (6WCSCM), Barcelona, Spain, July 15-17, 2014.

  13. Zhu, D., Dong, X., and Wang, Y. (2014). "Substructure model updating through iterative minimization of modal dynamic residual," Proceedings of SPIE, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security, 9063, San Diego, CA, USA, March 10-14, 2014.

  14. Zhu, D., Dong, X., Wang, Y. (2013). "Substructure model updating through modal dynamic residual approach," Proceedings of the 9th International Workshop on Structural Health Monitoring (IWSHM), Los Angeles, CA, USA, June 23-25, 2013.

  15. Zhu, D., Dong, X., Wang, Y. (2013). "An iterative convex optimization procedure for structural system identification," Proceeding of the ASCE 2013 International Workshop on Computing in Civil Engineering (IWCCE), Los Angeles, CA, USA, June 23-25, 2013.

  16. Zhu, D., Dong, X., Wang, Y. (2013). "A comparative study on modal-based finite element model updating approaches using noisy measurements," Proceeding of the 11th International Conference on Structural Safety & Reliability (ICOSSAR), New York, NY, USA, June 16-20, 2013.

  17. Zhu, D., Wang, Y., (2012). "Substructure model updating through iterative convex optimization," Proceeding of the ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS 2012), Stone Mountain, GA, USA, September 19-21, 2012.

  18. Zhu, D., Yi, X. and Wang, Y. (2011). "Sensitivity analysis of transmissibility functions for structural damage detection," Proceedings of SPIE, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security V, 7983: San Diego, CA, March 6 - 10, 2011.