Optimum design of a non-conventional multiple tuned mass damper for a complex power plant structure

Abstract

This paper implemented an optimal design of non-conventional multiple tuned mass damper (NC-MTMD) system for coal scuttles in power plant. The NC-MTMD was introduced using base isolation for the coal scuttles. Mathematical models of the NC-MTMD were derived by considering multiple three-dimensional (3D) modes. Base seismic excitation is represented by 3D Kanai-Tajimi filtered white noise. Properties of the base isolation (stiffness, damping) were calibrated through global optimisation using base shear and torsion as the objective function. Derivative (e.g. Global Search, Multi Start), or derivative free (e.g. Pattern Search, Genetic Algorithm and Simulated Annealing) algorithms were considered. Pattern Search algorithm showed better convergence, efficiency and stability performance. A comparative study was performed for single- and multi-mode cases. Robustness of the optimum design was investigated quantitatively. Design parameter variation and mass variation (due to different levels of coal storages) were considered and their influences were studied.

Keywords:

• Non-conventional tuned mass damper
• multiple tuned mass damper
• multiple mode
• power plant building
• optimum design
• mass variation

Acknowledgements

The authors would like to acknowledge the support from National Natural Science Foundation of China (Grant No. U1710111 & 51878426), International Collaboration Program of Science and Technology Commission of Shanghai Municipality (Grant No. 16510711300) and Sichuan Province (Grant No. 18GJHZ0111), International Collaboration Program of Science and Technology Commission of Ministry of Science and Technology, China (Grant No. 2016YFE0105600) and Power Construction Corporation of China (Grant No. KJ-2016-095).

Disclosure statement

No potential conflict of interest was reported by the authors.