This study introduces movable-track nonlinear energy sinks (MT-NESs) featuring customizable restoring forces. MT-NESs employ a novel track-spring configuration where the track parts themselves act as the movable mass, significantly reducing device dimensions and weight. The paper commences with the development of MT-NESs. A small-scale MT-NES is then experimentally realized on a two-story structure under impulsive excitation, validating the accuracy of the numerical model. Subsequently, a design example for seismic protection of the structure is presented, where the track shape, and thus the restoring force of the MT-NES, is designed for specific structure and excitation conditions. Comparative analyses with counterpart devices under seismic and impulsive excitations demonstrate the robust performance of the designed MT-NES, which closely aligns with the design objectives. This study underscores the flexibility of MT-NESs in generating customizable restoring forces within a compact configuration, positioning them as effective solutions for addressing control challenges beyond the capabilities of conventional mass dampers.

中文翻译：

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具有可定制恢复力的可移动轨道非线性能量槽


本研究介绍了具有可定制恢复力的可移动轨道非线性能量汇 （MT-NES）。MT-NES 采用新颖的轨道弹簧配置，其中轨道部件本身充当可移动质量，从而显着减小了设备的尺寸和重量。本文从 MT-NES 的开发开始。然后在脉冲激励下在两层结构上实验实现了小规模 MT-NES，验证了数值模型的准确性。随后，提出了一个结构抗震设计示例，其中轨道形状以及 MT-NES 的恢复力是针对特定结构和激励条件设计的。在地震和脉冲激励下与对应设备的比较分析表明，所设计的 MT-NES 具有强大的性能，这与设计目标密切相关。本研究强调了 MT-NES 在紧凑配置中产生可定制的恢复力的灵活性，将其定位为解决传统质量阻尼器能力之外的控制挑战的有效解决方案。