TY - JOUR
T1 - Experimental evaluation of an inertial mass damper and its analytical model for cable vibration mitigation
AU - Lu, Lei
AU - Fermandois, Gaston A.
AU - Lu, Xilin
AU - Spencer, Billie F.
AU - Duan, Yuan Feng
AU - Zhou, Ying
N1 - Funding Information:
The authors state their sincere gratitude to Sanwa Tekki Corp. for providing the inertial mass damper specimens and enjoy the pleasant discussion with Prof. Sunakoda. The authors also want to thank Mr. Donald Marrow and his colleagues from Newmark Civil Engineering Laboratory at the University of Illinois at Urbana-Champaign (UIUC), for their help during the experiment. Meanwhile, the first author gratefully acknowledges the support of China Scholarship Council (No. 201306260045) and National Natural Science Foundation of China Key Program (No. 51638012) on his research at UIUC. The second author gratefully acknowledges the financial support of CONICYT-Chile through the Becas Chile Scholarship No. 72140204, and Universidad Tecnica Federico Santa Maria (Valparaiso, Chile) through the Faculty Development Program Scholarship No. 208-13. Finally, the fifth author gratefully acknowledges the support of China Scholarship Council on his visit at UIUC and the support of National Natural Science Foundation of China through the Grants 51522811, U1709216, 51178426 and 51478429.
PY - 2019
Y1 - 2019
N2 - Cables are prone to vibration due to their low inherent damping characteristics. Recently, negative stiffness dampers have gained attentions, because of their promising energy dissipation ability. The viscous inertial mass damper (termed as VIMD hereinafter) can be viewed as one realization of the inerter. It is formed by paralleling an inertial mass part with a common energy dissipation element (e.g., viscous element) and able to provide pseudo-negative stiffness properties to flexible systems such as cables. A previous study examined the potential of IMD to enhance the damping of stay cables. Because there are already models for common energy dissipation elements, the key to establish a general model for IMD is to propose an analytical model of the rotary mass component. In this paper, the characteristics of the rotary mass and the proposed analytical model have been evaluated by the numerical and experimental tests. First, a series of harmonic tests are conducted to show the performance and properties of the IMD only having the rotary mass. Then, the mechanism of nonlinearities is analyzed, and an analytical model is introduced and validated by comparing with the experimental data. Finally, a real-time hybrid simulation test is conducted with a physical IMD specimen and cable numerical substructure under distributed sinusoidal excitation. The results show that the chosen model of the rotary mass part can provide better estimation on the damper's performance, and it is better to use it to form a general analytical model of IMD. On the other hand, the simplified damper model is accurate for the preliminary simulation of the cable responses.
AB - Cables are prone to vibration due to their low inherent damping characteristics. Recently, negative stiffness dampers have gained attentions, because of their promising energy dissipation ability. The viscous inertial mass damper (termed as VIMD hereinafter) can be viewed as one realization of the inerter. It is formed by paralleling an inertial mass part with a common energy dissipation element (e.g., viscous element) and able to provide pseudo-negative stiffness properties to flexible systems such as cables. A previous study examined the potential of IMD to enhance the damping of stay cables. Because there are already models for common energy dissipation elements, the key to establish a general model for IMD is to propose an analytical model of the rotary mass component. In this paper, the characteristics of the rotary mass and the proposed analytical model have been evaluated by the numerical and experimental tests. First, a series of harmonic tests are conducted to show the performance and properties of the IMD only having the rotary mass. Then, the mechanism of nonlinearities is analyzed, and an analytical model is introduced and validated by comparing with the experimental data. Finally, a real-time hybrid simulation test is conducted with a physical IMD specimen and cable numerical substructure under distributed sinusoidal excitation. The results show that the chosen model of the rotary mass part can provide better estimation on the damper's performance, and it is better to use it to form a general analytical model of IMD. On the other hand, the simplified damper model is accurate for the preliminary simulation of the cable responses.
KW - Inerter
KW - Inertial mass damper
KW - Nonlinearities
KW - Performance test
KW - Real-time hybrid simulation test
KW - Stay cable
UR - http://www.scopus.com/inward/record.url?scp=85072545159&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072545159&partnerID=8YFLogxK
U2 - 10.12989/sss.2019.23.6.589
DO - 10.12989/sss.2019.23.6.589
M3 - Article
AN - SCOPUS:85072545159
VL - 23
SP - 589
EP - 613
JO - Smart Structures and Systems
JF - Smart Structures and Systems
SN - 1738-1584
IS - 6
ER -