崔洪宇

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:船舶工程学院

学科:船舶与海洋结构物设计制造. 水声工程

联系方式:13478909739

电子邮箱:cuihongyu@dlut.edu.cn

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PREDICTING METHOD OF NATURAL FREQUENCY FOR SHIP'S OVERALL VERTICAL VIBRATION

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论文类型:期刊论文

发表时间:2014-09-01

发表刊物:BRODOGRADNJA

收录刊物:SCIE

卷号:65

期号:3

页面范围:49-58

ISSN号:0007-215X

关键字:ship; overall vertical vibration; natural frequency; shear coefficient

摘要:At ship design stage, empirical formulas are generally used to predict the overall vertical vibration natural frequency of ship to avoid the harmful resonance against main excitation. Nowadays, with the development of modern large-scale ships, the existing empirical formulas are becoming unpractical, some corrections shall be applied on these classical formulas or a new formula is to be derived for the prediction of vertical vibration frequencies of ship. In this paper, a new empirical formula is given for predicting the natural frequency of ship overall vertical vibration. Based on the Timoshenko beam theory, the formula is derived by introducing by shear coefficient to correction shear uniform distribution hypothesis for a thin-walled box beam with free-free boundary condition. This new formula is obtained by statistical analysis for large amounts of measured natural frequency results of the ship overall vertical vibration. The proposed prediction method in this paper was used to predict the natural frequencies of six ships. The predicted natural frequencies are consistent with that by measurements. The comparison with measurements show that the formula proposed in this article is more feasible to use, and also provide a new method to the prediction of natural frequency of the ship overall vertical vibration.