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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Vertical vibration isolator having piecewise-constant restoring force
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Vertical vibration isolator having piecewise-constant restoring force

机译：具有分段恒定恢复力的垂直隔振器

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We present a vertical vibration isolator having a piecewise-constant restoring force, which belongs to a class of passive and nonlinear vibration isolators. In vertical vibration isolation, direct use of low-stiffness elements leads to unacceptably large deformations due to self-weight. To overcome the difficulty, we apply a combination of constant-force springs, each of which sustains a constant load regardless of its stretch. By arranging the constant-force springs, so that the isolator has a piecewise-constant restoring force, we alleviate the problem of the excessive deformation caused by self-weight, provide stability at the static equilibrium state along with the self-centering capability, and realize a large stroke while keeping the mechanism simple and compact. Further, we attempt to limit the response acceleration within a tolerance regardless of the frequency spectrum and the magnitude of earthquake ground motions. We demonstrate the effectiveness of the present isolator through shaking table tests and numerical simulations.
机译：我们提出了一种具有分段恒定恢复力的垂直隔振器，属于一类被动和非线性隔振器。在垂直隔振中，由于自重，直接使用低刚度的元件会导致不可接受的大变形。为了克服这一困难，我们应用了恒力弹簧的组合，每个弹簧都承受恒定的载荷，而不管其拉伸程度如何。通过布置恒力弹簧，使隔离器具有分段恒定的恢复力，我们减轻了由于自重引起的过度变形的问题，在静态平衡状态下提供了稳定性以及自定心能力，并且在保持机构简单紧凑的同时实现大行程。此外，我们尝试将响应加速度限制在公差范围内，而与频谱和地震地面运动的幅度无关。我们通过振动台测试和数值模拟证明了本隔离器的有效性。

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