【摘要】 针对船舶工程中厚壁充液加压管道的轴向流固耦合振动问题,开展理论推导及频域求解研究。通过与文献算例对比验证所建立的计算方法的可靠性,利用有限元计算及轴向流体压力波波速分析,探讨厚壁理论与薄壁理论的适用性,并以直管和拼接组合管为研究对象,分析流速、内部静压对管道振动噪声传递的影响规律。计算结果表明,厚壁理论用于计算厚径比大于0.5的管道振动响应时更为精确;轴向流体压力波波速主要受管道材料、管道截面厚径比及长径比影响;管内压力主要影响横向振动,尤其作用于低阶频率,会增强振动传递效应。更多还原

【Abstract】 The theoretical derivation and frequency-domain solution for axial fluid-structure interaction vibration of thickwalled pressurized fluid-filled pipes in marine engineering were carried out. The proposed calculation method was validated by comparison with literature examples. The applicability of thick-walled and thin-walled theories was investigated using finite element method(FEM) calculation and axial fluid pressure wave speed analysis. The effects of flow velocity and internal static pressure on vibration and noise transmission of straight pipes and assembled pipes were discussed. Results show that the thickwalled theory is more accurate for calculating the vibration response of pipes with a thickness-to-radius ratio greater than 0.5;the axial fluid pressure wave speed is mainly affected by pipe material, sectional thickness-to-radius ratio, and length-todiameter ratio; internal pressure mainly influences transverse vibration, especially lower-order frequencies, and enhances vibration transmission.更多还原