高温环境船舶基座振动功率流特性研究

Vibration Power Flow Characteristics of Ship′s Foundation in High-temperature Environment

船舶设备基座常工作于高温环境下,但在设计中并未考虑温度的影响。通过对Abaqus软件二次开发实现功率流计算功能,并以功率流作为评价指标,采用不同激励方案对不同温度条件、肘板厚度、肘板间距的设备基座进行研究。结果表明,肘板厚度和肘板间距在各阶固有频率处对基座纵向传递功率流影响并不一致;低阶固有频率处温度上升将会改变肘板厚度对功率流的影响趋势;高阶固有频率处温度升高加剧功率流的波动程度且使功率流变化更为复杂。

A ship′s foundation often works in a high-temperature environment,however,its design does not consider the influence of temperature.In this paper,the power flow calculation is realized through our new development of the ABAQUS software.Using power flow as an evaluation index,different excitation schemes were used to study the foundation under different temperature,bracket thickness and bracket spacing.The results show that the bracket thickness and the bracket spacing have inconsistent effects on the longitudinal power flow of the foundation at each order natural frequency;increasing temperature at high-order natural frequency changes the trend effect of the bracket thickness on the power flow;increasing temperature at high-order natural frequency intensifies fluctuations in power flow and makes the power flow change more complicated.