Abstract Water wave impacts on jacket structures would result in heavy impulse loads, which induce strong vibrations because of the low damping characteristics of metallic members. In order to resist the wave-impact and suppress the vibration of structures, a novel steel brace that contains a multilayered multistable (MLMS) column is designed for an adjustable product of sufficient stiffness and high damping. According to finite element simulating, the initial stiffness of the MLMS column was almost same as that of the multistable steel column [1], but the energy dissipation was several times larger than that of this column. To understand the hysteresis mechanism of the MLMS column, we performed a hybrid analysis of multilayer lamination and mixed boundary buckling and noted: the soft layer of the MLMS column conducts the neutral axis and bending stiffness, which controls critical buckling load that decides the highness of the hysteresis loop; the eccentric end caps mediates the loading axis of the MLMS column, which induces in the increment of the postbuckling displacement that broadens the width of the hysteresis loop. So, the displacement-force hysteretic relation of the MLMS column can be effectually adjusted by the appropriate physical parameters of the soft layer and the end caps, which is validated by parameter analysis using FEM. Through FEM simulations, we studied a jacket structure assembled with dissipative braces containing MLMS column, which exhibited a several times increment in the decay rate of impact-induced vibration compared to that of the same jacket platform with existing dissipative columns [1]. This study demonstrated the MLMS column is an effective alternative for obtaining high structural stiffness and high damping in marine engineering.

中文翻译：

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具有多层结构增强的多稳态滞后阻尼的高级钢支架

摘要 水波对导管架结构的冲击会产生较大的冲击载荷，由于金属构件的低阻尼特性，会引起强烈的振动。为了抵抗波浪冲击并抑制结构的振动，设计了一种包含多层多稳定 (MLMS) 柱的新型钢支撑，以提供具有足够刚度和高阻尼的可调产品。根据有限元模拟，MLMS柱的初始刚度与多稳态钢柱的初始刚度几乎相同[1]，但耗能比该柱大几倍。为了了解 MLMS 柱的滞后机制，我们对多层层压和混合边界屈曲进行了混合分析，并指出：MLMS 柱的软层传导中性轴和弯曲刚度，控制临界屈曲载荷，决定滞后回线的高度；偏心端盖调节 MLMS 柱的加载轴，这会导致后屈曲位移的增加，从而加宽了滞后回线的宽度。因此，MLMS 柱的位移-力滞后关系可以通过软层和端盖的适当物理参数进行有效调整，这通过使用 FEM 的参数分析进行了验证。通过有限元模拟，我们研究了一个装有包含 MLMS 柱的耗散支架的导管架结构，与具有现有耗散柱的相同导管架平台相比，该导管架的冲击引起的振动衰减率增加了数倍 [1]。