摘要
依据S-L梁理论将包含各项二阶影响因素的剪切修正系数引入船体总振动的分析中;同时用二维源汇分布法代替Lewis法计算附连水质量、并与干模态进行动力耦合;推出了流固耦合的S-L梁振动方程。用该方程对一实船进行垂向振动计算,与实测值比较其结果较好。
It is simple and useful in engineering to apply beam theory in analysis of ship hull vibration. When higher-order frequencies of Ship girder are calculated, the Timoshenko Beam theory gives rise an error which exceeds accuracy requirements accepted in engineering. This paper introduces into ship hull vibration analysis the Stephen-Levinson Beam Theory and shear correction coefficients which account for the effects of each term of Second-Order Beam. While the added mass for ship hull vibration whcih will be dynamically coupled with dry-mode equation is calculated by using 2-D singalarity-distribution method instead of Lewis approach and the governing equation of fluid-structure coupled vertical vibrationfor S-L Beam and new form of transfer matrix are given. Futher the calculation of a ship has been performed in this paper with the reasults being in satisfactory agreement with obtained by experiments.
出处
《振动与冲击》
EI
CSCD
北大核心
1993年第1期8-13,共6页
Journal of Vibration and Shock
