针对舰船高温管路系统出现异常振动噪声的问题，需要研究温度变化对管路振声特性的影响。首先采用大涡模拟结合FW-H方程的方法，通过流体计算得到弯管的流场特性和流噪声声压级，分析管路在不同温度下的速度场分布、压力场分布和流噪声声压级，揭示了流场的分布特征和流噪声的总声压级随温度变化影响。然后采用模态分析和流固耦合的方法，通过数值模拟得到弯管的固有频率和振动速度，分析高温与常温下管路的模态结果与流激振动特性，揭示结构固有频率和振速总级随温度变化的影响。最后为减小中低频段内高温管路流激振动的影响，添加支撑进一步优化结构的振动水平。
To solve the problem of abnormal vibration and noise in ship high-temperature piping system, it is necessary to study the influence of temperature change on piping vibration and sound characteristics. First, large eddy simulation combined with FW-H equation was used to obtain the flow field characteristics and flow noise sound pressure level of the bent pipe through fluid calculation. The distribution of velocity field, pressure field and flow noise sound pressure level of the pipe at different temperatures were analyzed, and the distribution characteristics of the flow field and the influence of the total sound pressure level of flow noise on the change of temperature were revealed. Then the modal analysis and fluid-structure coupling method are used to obtain the natural frequency and vibration velocity of the bent pipe through numerical simulation. The modal results and fluid-induced vibration characteristics of the pipe at high temperature and normal temperature are analyzed to reveal the influence of the natural frequency and vibration velocity of the structure with the change of temperature. Finally, in order to reduce the influence of flow-induced vibration of high temperature pipelines in middle and low frequency bands, support is added to further optimize the vibration level of the structure.
2025,47(16): 20-27 收稿日期：2024-11-4
DOI：10.3404/j.issn.1672-7649.2025.16.004
分类号：U664.84
基金项目：国家自然科学基金青年科学基金项目（52201366）
作者简介：李永正(1981-),男,博士,教授,研究方向为结构力学
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