TY - JOUR
T1 - A novel rotational inertia damper for amplifying fluid resistance
T2 - Experiment and mechanical model
AU - Ma, Ruisheng
AU - Bi, Kaiming
AU - Hao, Hong
N1 - Funding Information:
The authors are grateful for the financial support from Australian Research Council (DP 190103279) for carrying out this research. The first author would also like to thank Curtin University and China Scholarship Council for providing the scholarship. The authors would like to acknowledge Prof. Fawei Qiu from Beijing Three Unite Testing System Co. Ltd. (TUTS) for his help in the tests.
Funding Information:
The authors are grateful for the financial support from Australian Research Council ( DP 190103279 ) for carrying out this research. The first author would also like to thank Curtin University and China Scholarship Council for providing the scholarship. The authors would like to acknowledge Prof. Fawei Qiu from Beijing Three Unite Testing System Co., Ltd. (TUTS) for his help in the tests.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/2/15
Y1 - 2021/2/15
N2 - An inerter is a two-terminal mechanical device with the property of generating a resisting force that is proportional to the relative acceleration across its terminals. Due to its distinct mass amplification and negative stiffness effects, inerter has been applied to enhance the performance of conventional control systems, e.g. tuned mass damper (TMD) and vibration isolation system (VIS). Very recently, a novel inerter-based damper dubbed rotational inertia damper (RID) that is capable of generating a significant damping force was proposed by the authors to control the vibrations of offshore platforms, and its control effectiveness was examined through analytical studies. In the present study, a RID prototype was manufactured and tested under harmonic excitations for an in-depth understanding and demonstration of its mechanical behaviors. A precise mechanical model considering inerter nonlinearities is proposed to predict the behaviors of the RID, and the corresponding parameters are identified by using a nonlinear least squares method based on the experimental results. The theoretical results predicted by the proposed mechanical model are then compared with the experimental results, good agreements are achieved. The results demonstrate that the developed RID has a good capacity for energy dissipation, and the proposed mechanical model is accurate in predicting the behaviors of the RID.
AB - An inerter is a two-terminal mechanical device with the property of generating a resisting force that is proportional to the relative acceleration across its terminals. Due to its distinct mass amplification and negative stiffness effects, inerter has been applied to enhance the performance of conventional control systems, e.g. tuned mass damper (TMD) and vibration isolation system (VIS). Very recently, a novel inerter-based damper dubbed rotational inertia damper (RID) that is capable of generating a significant damping force was proposed by the authors to control the vibrations of offshore platforms, and its control effectiveness was examined through analytical studies. In the present study, a RID prototype was manufactured and tested under harmonic excitations for an in-depth understanding and demonstration of its mechanical behaviors. A precise mechanical model considering inerter nonlinearities is proposed to predict the behaviors of the RID, and the corresponding parameters are identified by using a nonlinear least squares method based on the experimental results. The theoretical results predicted by the proposed mechanical model are then compared with the experimental results, good agreements are achieved. The results demonstrate that the developed RID has a good capacity for energy dissipation, and the proposed mechanical model is accurate in predicting the behaviors of the RID.
KW - Experimental study
KW - Inerter
KW - Mechanical model
KW - Model identification
KW - Rotational inertia damper
UR - http://www.scopus.com/inward/record.url?scp=85091960805&partnerID=8YFLogxK
U2 - 10.1016/j.ymssp.2020.107313
DO - 10.1016/j.ymssp.2020.107313
M3 - Journal article
AN - SCOPUS:85091960805
SN - 0888-3270
VL - 149
JO - Mechanical Systems and Signal Processing
JF - Mechanical Systems and Signal Processing
M1 - 107313
ER -