A Half-Cycle Negative-Stiffness Damping Model and Device Development

Abstract

This paper proposes a novel damping model with negative stiffness known as the half-cycle negative-stiffness damping model. Analysis of a single degree of freedom (SDOF) system demonstrated that the half-cycle negative-stiffness damping model has negative stiffness and energy dissipation. The equivalent negative stiffness of the model was derived from the frequency response analysis of the system. An alternating transmission system and a one-way friction system were developed to assemble a half-cycle negative-stiffness damping device (HCNSDD), which can generate a half-cycle negative-stiffness damping model. A mechanical model was developed to represent the force-displacement relationship of the proposed HCNSDD. A HCNSDD specimen was manufactured and examined using experimental tests. The HCNSDD exhibits half-cycle negative-stiffness damping and stable mechanical properties, demonstrating the feasibility and effectiveness of the proposed HCNSDD. Finally, a finite element simulation approach for HCNSDD was presented, and the performance of seismic vibration control of HCNSDD was evaluated using a multidegree-of-freedom system.

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

“…If the damping generated in the unloading phase exceeds that of the loading phase, then hysteresis with equivalent negative stiffness can be obtained [50]. To realize this mechanism, a passive triangular damping system was designed.…”

“…Iemura et al [46,47] proposed a negative stiffness hysteresis loop to control the seismic response of structures and demonstrated its advantages and effectiveness experimentally. Sun and Peng et al [48][49][50] designed several types of devices that exhibit negative stiffness. Through experimental and theoretical methods, Nagarajaiah et al [51][52][53][54] investigated whether the seismic performance of structures can be improved with negative stiffness devices.…”

Damping and Stiffness Analysis of Sandwich Beam with 3D-Printed Honeycomb Core Filled with Magnetorheological Elastomer (MRE): An Experimental Approach

“…The modeling of structural vibration response is of utmost importance in the process of sizing and designing structures. The precise estimation of natural frequencies holds significant importance in advanced domains such as civil engineering for seismic control [ 7 , 8 ], space exploration, and aerospace engineering, primarily due to the inherent unpredictability associated with these systems. The application of technology in enhancing the design and construction of structures results in a rise in mechanical stiffness and damping [ 9 ].…”