摘要
为研究船舶双层底液舱对主机隔振系统振动性能的影响,建立船舶主机、主机座下双层底液舱的整体模型,运用有限元方法分析系统振动频率的变化和舱内油液对系统振动响应的影响.仿真结果表明:考虑液舱后整体固有频率下降;油液增加后,系统的第一阶固有频率小幅升高,其他高阶次频率下降;频率响应曲线向高频移动,原共振频率处的响应峰值降低80%以上.
The integrated model of main engine and double bottom tank underneath the main engine was developed to study the effects of double bottom tank system on the vibration characteristic of the main engine, which would improve the actuation of vibration isolation for main engine. Based on the finite element method, this model focused on the shift of system vibration frequency and the influence of oil on the system vibration responses. Simulation results indicate that the system eigenfrequency decreases as the double bottom tank is put into consideration. And the first eigenfrequency rise a little when the oil is filled, while the other higher frequencies decrease. Due to this effect, the frequency response curve moves towards the higher frequency, and the peak value of the response at original resonance frequency drops by more than 80 %.
出处
《大连海事大学学报》
EI
CAS
CSCD
北大核心
2008年第4期147-149,共3页
Journal of Dalian Maritime University
基金
辽宁省自然科学基金资助项目(20072144)
关键词
船舶
双层底液舱
油液
频率响应
有限元法
ship
double bottom tank
oil
frequency response
finite element methods
