Monolithic geometric anti-spring blades
Monolithic geometric anti-spring blades
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DOI：
10.1016/j.nima.2004.10.042
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发表时间：
2005-03-21
影响因子：
1.4
通讯作者：
Takamori, A
中科院分区：
文献类型：
--
作者：
Cella, G;Sannibale, V;Takamori, A
在本文中，我们研究了为地面引力波干涉仪设计的垂直被动地震噪声衰减器的原理和特性。这种机械衰减器基于称为整体几何反弹簧 (MGAS) 的悬臂叶片的特殊几何形状，允许设计具有非常低谐振频率（低于 10 mHz）的机械谐振子。在这里，我们对机械装置进行理论描述，重点关注低频区域最重要的量、内应力的分布和热稳定性。为了获得衰减器特性的物理洞察，我们设计了一些简化的模型，而不是使用有限元分析的强力。这些模型已用于优化 LIGO 高级配置和下一代 TAMA 干涉仪的地震衰减系统原型的设计。 (c) 2004 Elsevier B.V. 保留所有权利。
In this article we investigate the principle and properties of a vertical passive seismic noise attenuator conceived for ground based gravitational wave interferometers. This mechanical attenuator based on a particular geometry of cantilever blades called monolithic geometric anti springs (MGAS) permits the design of mechanical harmonic oscillators with very low resonant frequency (below 10 mHz).Here we address the theoretical description of the mechanical device, focusing on the most important quantities for the low-frequency regime, on the distribution of internal stresses, and on the thermal stability. In order to obtain physical insight of the attenuator peculiarities, we devise some simplified models, rather than use the brute force of finite element analysis. Those models have been used to optimize the design of a seismic attenuation system prototype for LIGO advanced configurations and for the next generation of the TAMA interferometer. (c) 2004 Elsevier B.V. All rights reserved.