Behavior of polycal wire rope isolators subjected to large lateral deformations
Behavior of polycal wire rope isolators subjected to large lateral deformations
复制标题
DOI：
10.1016/j.engstruct.2019.04.039
复制
发表时间：
2019-07-15
影响因子：
5.5
通讯作者：
Barakat, Samer
中科院分区：
文献类型：
--
作者：
Leblouba, Moussa;Rahman, M. E.;Barakat, Samer
Polycal钢丝绳隔振器（PWRI）有许多应用，特别是在海军和航空航天结构中。PWRI用于隔离单个设备或完整的浮动地板，以防止不必要的冲击和振动。PWRI由连接在圆形板之间的拱形钢丝绳股组成。这种结构导致具有非线性滞后行为的隔离器能够提供必要的阻尼以耗散输入能量。在本文中，一个完整的研究的剪切循环行为的PWRI。在不同的加载速率下，在剪切模式下，12个不同几何形状的隔离器进行了测试。刚度，能量耗散和阻尼的确定和相关的几何和机械性能的每个隔离。针对现有数学模型在描述钢丝绳隔振器滞回特性方面的局限性，提出了一种新的数学模型，该模型采用Bouc-Wen-Baber-Noori滞回模型，并引入了一个调制函数。该模型被证明是准确地复制的软硬化，对称，滞后回线。
Polycal Wire rope isolators (PWRIs) have found many applications, especially in naval and aerospace structures. PWRIs are used to isolate individual equipment or complete floating floors against undesirable shocks and vibrations. A PWRI consists of arch shaped wire rope strands connected between circular plates. This architecture results in an isolator with a nonlinear hysteresis behavior capable of providing the necessary damping to dissipate an input energy. In this paper, a complete study of the shear cyclic behavior of PWRIs is presented. Twelve isolators of different geometries were tested in shear mode under different loading rates. The stiffness, energy dissipation, and damping were determined and related to the geometric and mechanical properties of each isolator. To overcome the limitations of existing mathematical models in representing the hysteretic behavior of wire rope isolators, a new model is proposed, in which, the Bouc-Wen-Baber-Noori model of hysteresis was adopted in conjunction with a modulating function. The model is shown to accurately replicate the soft-hardening, symmetric, hysteresis loops.