CAJ | 학술논문

以船体主机下肋板为例，研究船体振动时船底肋板在频率10～150 Hz范围振动剧烈的减振方法。通过改变结构的刚度和阻尼，探讨降低肋板剧烈振动的方法。其中改变结构的刚度，包括改变板厚和安装加强筋等，改变阻尼是通过敷设阻尼层来实现。利用ANSYS有限元软件进行模拟计算，对比分析结构的刚度和阻尼发生变化时肋板的振动变化，得出改变结构的刚度和阻尼都可以对局部振动起到降低振动的效果。从实际应用的经济性考虑，安装加强筋方法最优。
이선체주궤하륵판위례，연구선체진동시선저륵판재빈솔10～150 Hz범위진동극렬적감진방법。통과개변결구적강도화조니，탐토강저륵판극렬진동적방법。기중개변결구적강도，포괄개변판후화안장가강근등，개변조니시통과부설조니층래실현。이용ANSYS유한원연건진행모의계산，대비분석결구적강도화조니발생변화시륵판적진동변화，득출개변결구적강도화조니도가이대국부진동기도강저진동적효과。종실제응용적경제성고필，안장가강근방법최우。
The floor below the main engine was taken as example to research the measure for reducing hull vibration in the frequency range of 10-150Hz.Through the revision of the structure stiffness and damping , the means to reduce severe vibration were explored .The structural stiffness was changed by changing the plate thickness and installation stiffener , and the damping is changed by laying the damping layer .Comparing the results of FE simulation in ANSYS , the influences of structural stiffness and damping change upon vibration were analyzed .It showed that changing the structural stiffness and damping can reduce local vi -bration.From practical economic considerations , installation stiffener is the best way .