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超大型油船的总振动分析
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摘要
研究分析了超大型油船的总振动特性。对船舶总体振动特性的分析,可以帮助船舶避免全船性的低谐调共振。舷外水会影响船体总振动的有效质量,从而影响总振动的固有频率。研究舷外水对总振动的影响,可以帮助更全面地分析总振动特点。本文基于有限元整船三维模型,研究了全船固有频率和固有振型。通过虚拟质量法,研究了附连水质量对船体固有频率的影响,发现附连水对垂向振动的影响非常大。
Global vibration of very large crude oil carrier is analyzed. Global vibration analysis for ships is very helpful for avoiding low harmonic resonance. Surrounding water will influence the effective mass of global vibration, which is related to the inherent frequency of global vibration. Analyze the influence of surrounding water is helpful to the comprehensive understanding of global vibration. To analyze the inherent frequency and natural mode of global vibration, three dimensional finite element modeling of whole ship is utilized. Use virtual mass method to analyze the influence of added water mass on inherent frequency of global vibration. Vertical vibration is sensitive to added water mass.
引文
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