某高速舰艇主机改装的艉部振动响应预报

针对某高速宾主机换装，进行了艉部振动响应的预报，探讨了建模、模型的校正、以及阻尼和激振力的选取问题，利用ＳＥＳＡＭ程序对该艇主机功率增大后，采用三叶桨的船体响应进行预报，并与实测结果进行了比较，结果表明，采用适当的实船数据与实船振动测试数据，可以对母船改型减振效果进行准确评估，并可以尽量减少船舶上有害振动的发生，具有实际意义。

Stern Vibration Response Prediction of a High Speed Craft Due to Change of the Main Engine

In accordance with the change of the main engine of a high speed craft,the stern vibration response is predicted.The setup and the correction of the model and the selection of the damping and exciting force are presented.The ship hull vibration response of the craft after the change of the main engine is calculated via SESAM and checked with the full scale test,which shows a good agreement.With the knowledge of the ship hull data and full scale test data,it is very feasible to carry out accurate prediction of vibration response of a craft after some modifications.As it can be used to lessen the harmful vibration on board,it is very significant.