Implementation of Shape Memory Alloy Sponge as Energy Dissipating Material on Pounding Tuned Mass Damper: An Experimental Investigation

Abstract

Piping systems are important nonstructural components of most types of buildings. Damage to piping systems can lead to significant economic losses, casualties, and interruption of function. A survey of earthquake disaster sites shows that suspended piping systems are flexible and thus prone to large deformation, which can lead to serious damage of the piping systems. The single-sided pounding tuned mass damper (PTMD), which is an emerging vibration suppression tool, has the potential to serve as a cost effective and non-invasive solution for the mitigation of vibration in suspended piping systems. The operating frequency of the single-sided PTMD can be tuned similarly to a tuned mass damper (TMD). The single-side PTMD also possesses high energy dissipation characteristics and has demonstrated outstanding performance in vibration control. One of the key factors affecting the performance of the PTMD is the damping material, and there is a constant search for the ideal type of material that can increase the performance of the PTMD. This paper explores the use of shape memory alloy (SMA) sponge as the damping material for two types (spring steel and pendulum types) of PTMDs to mitigate the vibration of a suspended piping system. The PTMDs are tested both in free vibration and in forced vibration. The results are compared with no control, with a TMD control, and with a viscoelastic (VE) material PTMD control. The results show that in free vibration tests, SMA–PTMDs attenuate the displacement of the piping system significantly. The time to mitigate vibration (i.e., reduce 90% of the vibration amplitude) is reduced to 6% (for spring steel type) and 11% (for pendulum type) of the time taken to mitigate vibration without control. In forced vibration tests, the overall magnitudes of the frequency response are also lowered to 38% (spring steel) and 44% (pendulum) compared to vibration without control. The results indicate that SMA has the potential to be a promising energy dissipating material for PTMDs.

Vibration analysis of fluid-structure interaction using tuned mass dampers

“…The operating frequency of the single-sided can be tuned similarly to a tuned mass damper (TMD). In [15] explored the application of shape memory alloy as the damping piece of pounding tuned mass dampers to mitigate the fl uctuation of suspended pipes. Studies show that if the fl uid fl ow velocity is somehow that vortex shedding frequency comes close to the fun- Figure 1: application of a dynamic vibration absorber for control of a marine shafting system [9] damental natural frequency of the system, large and severe oscillations are created in the structure.…”

Experimental Study on Influence of Temperature to Control Performance for Viscoelastic Materials Pounding Tuned Mass Damper

“…Wang et al (Wang et al, 2017b;Wang et al, 2017c;Wang et al, 2018a;Wang et al, 2018b;Wang et al, 2019) studied single-sided the optimum PTMD design, including its control performance and impact force modelling through experiments and simulations. Tan et al (Tan et al, 2019a;Tan et al, 2019b) designed a novel singlesided PTMD to control the vibration of a suspended piping system, and compared the control performances between PTMDs using viscoelastic materials versus shape memory alloy (SMA) sponges as the energy dissipating material.…”

Robustness of the Active Rotary Inertia Driver System for Structural Swing Vibration Control Subjected to Multi-Type Hazard Excitations

“…It mainly includes three basic motion modes, according to the relationship between the lifting point and the moving direction of the structures: the swing motion mode, the sway motion mode, and the swing and sway coupling motion mode [3]. Based on many practical applications and studies, the observation result shows that traditional vibration control devices such as the tuned mass damper (TMD) [4][5][6][7][8][9][10][11], tuned liquid damper (TLD) [12,13], particle damper (PD) [14], pounding tuned mass damper (PTMD) [15][16][17], and frictional tuned mass damper [18,19], are reliable and efficient for civil engineering structures. Active Mass Dampers (AMD) [20][21][22][23][24][25][26][27] have been widely studied in civil engineering for their superior effectiveness and larger spectral bandwidth [28][29][30][31][32].…”