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首页> 外文期刊>Mechanical systems and signal processing >Substructuring including interface reduction for the efficient vibro-acoustic simulation of fluid-filled piping systems
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Substructuring including interface reduction for the efficient vibro-acoustic simulation of fluid-filled piping systems

机译：包括接口减少在内的子结构，用于流体填充管道系统的有效振动声学模拟

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摘要

The operation of pumps and valves leads to strong acoustic excitation in fluid-filled piping systems. Efficient substructuring and model order reduction strategies are required for the sound prediction in piping systems, and in order to reduce the sound transmission to attached components, such as the floor panel in vehicles, for example. This research presents a finite element based automatic substructuring and component mode synthesis technique, which is a combination of an extended Craig-Bampton method for fluid-structure coupled piping systems and a novel, consecutive interface reduction. Hereby, the remaining interface degrees of freedom between different substructures are further reduced using appropriate Ritz vectors. The proposed model order reduction strategy accelerates the computation of transfer functions in fluid-filled extended piping systems. In order to validate the simulation results, experimental results are obtained by a hydraulic test bench for dynamic measurements, where fluid pulsation is induced by piezo-driven transducers. The observed fluid-structure interaction phenomena correspond to the predictions by the proposed computation approach.
机译：泵和阀的操作会导致在充满流体的管道系统中产生强烈的声激励。管道系统中的声音预测需要有效的子结构和模型顺序减少策略，并且例如，为了减少声音传递到连接的组件（例如车辆的地板）中，就需要这种策略。这项研究提出了一种基于有限元的自动子结构和组件模式综合技术，该技术结合了适用于流固耦合管道系统的扩展Craig-Bampton方法和新颖的连续接口简化方法。因此，使用适当的Ritz矢量进一步减小了不同子结构之间的剩余界面自由度。拟议的模型降阶策略可加快流体填充扩展管道系统中传递函数的计算速度。为了验证模拟结果，通过液压测试台获得了用于动态测量的实验结果，其中压电驱动换能器引起了流体脉动。所观察到的流体-结构相互作用现象对应于所提出的计算方法的预测。

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