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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Adjustable vertical vibration isolator with a variable ellipse curve mechanism
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Adjustable vertical vibration isolator with a variable ellipse curve mechanism

机译：具有可变椭圆曲线机构的可调式垂直隔振器

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This paper presents a passive vertical quasi-zero-stiffness vibration isolator intended for relatively small objects. The present isolator has features of compactness, long stroke, and adjustability to various load capabilities. To realize these features, we use constant-force springs, which sustain constant load regardless of their elongation, and propose a variable ellipse curve mechanism that is inspired by the principle of ellipsographs. The variable ellipse curve mechanism can convert the restoring force of the horizontally placed constant-force springs to the vertical restoring force of the vibration isolator. At the same time as converting the direction, the vertical restoring force can be adjusted by changing the ratio of the semi-minor axis to the semi-major one of the ellipse. In this study, a prototype of a class of quasi-zero-stiffness vibration isolator with the proposed variable ellipse curve mechanism is created. Shaking table tests are performed to demonstrate the efficacy of the present mechanism, where the prototype is subjected to various sinusoidal and earthquake ground motions. It is demonstrated through the shaking table tests that the prototype can reduce the response acceleration within the same specified tolerance even when the mass of the vibration isolated object is changed. Copyright (c) 2017 John Wiley & Sons, Ltd.
机译：本文提出了一种用于相对较小物体的无源垂直准零刚度隔振器。本发明的隔离器具有紧凑，长行程和可适应各种负载能力的特征。为了实现这些功能，我们使用了恒力弹簧，无论其伸长率如何，均能承受恒定的载荷，并提出了一种受椭圆仪原理启发的可变椭圆曲线机构。可变椭圆曲线机构可以将水平放置的恒力弹簧的回复力转换为隔振器的垂直回复力。在转换方向的同时，可以通过改变半短轴与椭圆的半长轴之比来调整垂直恢复力。在这项研究中，创建了具有拟变椭圆曲线机制的一类准零刚度隔振器的原型。进行振动台测试以证明本机制的有效性，其中原型经受各种正弦波和地震地震动。通过振动台测试表明，即使在改变隔振对象的质量的情况下，原型也可以在相同的指定公差内降低响应加速度。版权所有（c）2017 John Wiley＆Sons，Ltd.

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