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Junfeng Liu, Yujun Hu, Ji Yao and Qing Zhang
Tuned mass dampers (TMDs) are widely used as vibration damping devices in engineering practice. However, during use, TMDs inevitably exhibit some nonlinear characteristics that may negatively impact engineering applications. To improve the practical perf...
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Yujun Hu, Ji Yao, Junfeng Liu and Qing Zhang
The use of this analytical method can improve the damping performance of tuned mass dampers, which has a certain reference value in the subsequent study of TMD nonlinear characteristics, and the analytical method has some significance for improving the e...
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Jixin Man, Beirao Xue, Xiangde Bian, Wengao Yan, Da Qiao and Wu Zeng
Friction dampers are widely employed to reduce blade resonance vibration amplitude in turbomachinery. In this paper, a study was performed on the forced response of two blades with dual friction dampers. Numerical simulation and experimental testing were...
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Ganbo Zhang, Yao Zhao and Wei Chu
Propeller-induced longitudinal vibration resonance in marine propulsion shafting systems causes great harm to the hull structure and is the primary source of shipboard noise. Integrating a friction damper with designed parameters into thrust bearings can...
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Longteng Liang, Zhouquan Feng and Zhengqing Chen
This work deals with the dynamic response calculation and energy dissipation analysis of a linear elastic single-degree-of-freedom (SDOF) system with a supplemental nonlinear eddy current damper (ECD) subjected to base excitation, in preparation for opti...
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Seongkyu Chang and Deokyong Sung
This study presents a neuro-control algorithm based on structural modal energy that outputs an optimal control signal to reduce vibration during earthquakes. The modal energy of a structure is used in the objective function during the training process of...
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Pamuda Pudjisuryadi,Benjamin Lumantarna,Tjhai Ferlinda Hermawan,Teddy Tirta Gunawan
Pág. 86 - 90
Buildings designed using older code should be checked against the higher demand required by newer code. In this study, performance of Building T of Petra Christian University, Surabaya, Indonesia, which was designed with older Indonesian Seismic Code (PP...
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Chunyun Shen, Genpei Li, Zhongxu Tian, Chang Chen and You Zhou
The torsional stiffness parameter significantly influences the natural frequency of a leaf spring torsional vibration damper and its proper match with a diesel engine, and the nonlinear characteristics of torsional stiffness avoid reduced reliability due...
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Qing Lyu, Baijie Zhu, Wensheng Lu, Bo Fu, Liangkun Liu, Wei Qian, Ming Zhou and Zhenya Zhang
A five-story moment frame structural model with a base isolation system was tested on a shaking table. The isolation system comprised both linear natural rubber bearing (LNR) and nonlinear viscous dampers (NLVDs). Seven ground motions were employed: incl...
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Chiara Gastaldi and Muzio M. Gola
A method called PCR (Platform Centered Reduction) is designed to more effectively perform complex iterative and nonlinear calculations required for the dynamic response of turbine blades damped by dry friction contacts between rigid dampers and airfoil-t...
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Wei Chen, Xingyu Du, Bao-Lin Zhang, Zhihui Cai and Zhongqiang Zheng
To improve the safety and reliability of offshore structures subject to wave loading, the active vibration control problem is always one of significant issues in the field of ocean engineering. This paper deals with the near?optimal control problem of of...
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David G. Wilson, Rush D. Robinett III, Giorgio Bacelli, Ossama Abdelkhalik and Ryan G. Coe
This paper extends the concept of Complex Conjugate Control (CCC) of linear wave energy converters (WECs) to nonlinear WECs by designing optimal limit cycles with Hamiltonian Surface Shaping and Power Flow Control (HSSPFC). It will be shown that CCC for ...
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Taimur Ali Shams, Syed Irtiza Ali Shah, Muhammad Ayaz Ahmad, Kashif Mehmood, Waseem Ahmad and Syed Tauqeer ul Islam Rizvi
Landing gear system of an aircraft enables it to take off and land with safety and comfort. Because of the horizontal and vertical velocity of aircraft, upon landing, the complete aircraft undergoes different forcing functions in the form of the impact f...
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Hesheng Tang, Xueyuan Guo, Liyu Xie and Songtao Xue
The uncertainty in parameter estimation arises from structural systems? input and output measured errors and from structural model errors. An experimental verification of the shuffled complex evolution metropolis algorithm (SCEM-UA) for identifying the o...
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Flavia Bustos, Jorge Hinojosa and Víctor Tuninetti
The computational modeling of hysteretic dampers is a powerful tool for design, allowing us to predict and optimize damper performance. In this research, a numerical model, based on Chaboche?s nonlinear kinematic hardening constitutive law, was implement...
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Jiao Wang, Mingxin Juan, Shuguo Yang, Decong Zhang, Zhongyi Zhang, Jie Jin and Tao Yu
In the engineering field, severe vibration of the pipeline system occurs under random excitation, which leads to vibration failure of the pipeline system due to overload. The traditional method is to increase the rigidity of the pipeline system, and to a...
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Antonio Carlo Bertolino, Matteo Gaidano, Stefano Smorto, Paolo Giovanni Porro and Massimo Sorli
Vibrations generated by the main rotor-gearbox assembly in a helicopter are the principal cause of damage to cockpit instruments and crew discomfort in terms of cabin noise. The principal path of vibration transmission to the fuselage is through the gear...
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Quang-Ngoc Le, Hyeong-Mo Park, Yeongjin Kim, Huy-Hoang Pham, Jai-Hyuk Hwang and Quoc-Viet Luong
Aircraft landing gear equipped with a magnetorheological (MR) damper is a semi-active system that contains nonlinear behavior, disturbances, uncertainties, and delay times that can have a huge impact on the landing?s performance. To solve this problem, t...
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Gianpietro Di Rito, Romain Kovel, Marco Nardeschi, Nicola Borgarelli and Benedetto Luciano
The work deals with the model-based characterization of the failure transients of a fail-safe rotary EMA developed by Umbragroup (Italy) for the flap movables of the RACER helicopter-plane by Airbus Helicopters (France). Since the reference application r...
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Yanan Wu, Haijun Xuan, Changyao Wu, Dong Mi, Mingmin Qu and Tao Jin
Underplatform dampers (UPDs), a type of dry friction damper, are commonly used for vibration reduction of turbine blades. This study investigated the effect of UPDs on the forced torsional vibration response of turbine blades within a multi-blade system....
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