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首页> 外文会议>Congress of IABSE (International Association for Bridge and Structutal Engineering) >Feasibility study of wind tunnel aeroelastic tests on bridges with floating towers
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Feasibility study of wind tunnel aeroelastic tests on bridges with floating towers

机译：浮桥桥梁风洞空气弹性试验的可行性研究

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Floating towers are an innovative design solution for long-span bridges crossing deep waters, where grounded towers are not applicable. This kind of structural solution brings about challenging issues related to the design of such structures exposed to the combined action of aerodynamic forces and hydrodynamic forces. One of the major issues is the experimental validation of numerical models to simulate the structural dynamics, based on hybrid codes joining aero-elastic and hydro-elastic interactions. This paper presents a feasibility study of wind-tunnel aeroelastic tests, where the submerged part of the bridge is simulated by Hardware-In-the-Loop (HIL) technology: actuators simulates the motion of the floater due to the combined action of the hydrodynamic loads on the floater (numerically simulated in real time) and of the aerodynamic and inertial loads transmitted by the tower (measured by a 6-components dynamometer). A similar HIL testing device has been developed at POLIMI in the field of floating offshore wind turbines, and it is likely to be applied to long-span bridges, as a tool for the experimental validation of complex numerical hybrid approaches. The opportunities offered by this technology will be discussed in the paper, working out a numerical example where the full-scale response of a FEM of the full-bridge is simulated and then it is scaled in order to assess the feasibility of aeroelastic tests in wind tunnel, with a focus on the characteristics of the actuation system for the tower base: necessary of degrees of freedom, amplitude and bandwidth of motion and force.
机译：浮动塔是一种创新的设计解决方案，适用于穿过深水深处的长跨度桥梁，接地塔不适用。这种结构解决方案带来了与暴露于空气动力和流动力力的组合作用的这种结构的设计有关的具有挑战性的问题。其中一个主要问题是基于加入航空弹性和水力弹性相互作用的混合码来模拟结构动力学的数值模型的实验验证。本文介绍了风洞空气弹性试验的可行性研究，其中桥的浸没器由环路（HIL）技术模拟：致动器由于流体动力学的组合动作而模拟了浮动的运动浮动（实时数量模拟）和塔架传输的空气动力学和惯性载荷（由6分量测量计测量）上的负载。在浮动海上风力涡轮机领域的脊髓米米中开发了类似的HIL检测装置，并且很可能应用于长跨度桥梁，作为复杂数值混合方法的实验验证的工具。本技术提供的机会将在纸质中讨论，求解一个数值示例，其中模拟了全桥的FEM的全尺度响应，然后进行了扩展，以评估风力测试在风中的可行性隧道，专注于塔基座的致动系统的特点：必要的自由度，运动和力的带宽。

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