Novel approach for structural dynamic topology optimizations based on power flow mode theory

Xiong, Yeping (2014) Novel approach for structural dynamic topology optimizations based on power flow mode theory. In Vibration Engineering and Technology of Machinery. vol. 23, Springer. pp. 1065-1076 . (doi:10.1007/978-3-319-09918-7_94).

Record type: Conference or Workshop Item (Paper)

Abstract

The generalized damping based power flow mode theory [1] reveals natural power flow behaviours of a dynamic system based on the inherent characteristics of the system’s damping distribution, which provides insight into energy dissipation mechanisms of the dynamic system. In this paper, a new Power Flow Mode Dynamic Topology Optimisation (PFMTOP) approach is proposed based on the developed power flow mode theory to achieve topologically optimised systems’ damping material distributions with enhanced vibration suppression capability. Conventional method of topology optimization focuses on minimizing the structural frequency response or dynamic compliance without considering structural damping. The new approach developed herein uses the system’s characteristic damping matrix to find an optimal damping material layout that maximize the energy dissipation for a given volume of the material to achieve minimum power flow response. The results reveal that this approach can significantly enhance vibration energy dissipation and provides an effective method for optimised systems’ damping material distributions with enhanced vibration suppression capability and reduced material usages. This new method can be readily extended to more complex structures to optimize the topology of damping material layer for improved vibrational power flow control

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