中文摘要：

为提高磁流变阻尼器在海洋工程复杂环境下的动力学性能,研究太阳热辐射对磁流变阻尼器表面温升的影响。分析阻尼器的温升原理,结合磁场有限元仿真建立磁流变阻尼器内部做功与外部热辐射混合作用的表面温升模型,采用四阶Runge-Kutta方法求解方程;搭建以电阻式热电偶测量表面温度的阻尼动力学试验平台,并对影响温升的主要参数进行相关性分析。研究表明,所建温升模型和方法可用于预测阻尼器表面热辐射影响下的实际温升状态,当表面温度为60℃-85℃时,阻尼力衰减达10%-12%,3 000 s时间太阳热辐射导致温度升幅2.7%。长时间热辐射将对阻尼器减振性能产生较大影响,增大阻尼器缸筒有效面积和相对空气流速可降低表面温升。

英文摘要：

To improve the dynamic performance of magnetorheological（MR） damper under complex marine engineering environment,the solar radiation effect on the surface temperature rise of MR damper is studied.According to the temperature rise principle of the damper,a heating model is developed using the magnetic FE technique.In this model,the internal work and external solar radiation of the MR damper is considered and the 4th order Runge-Kutta method is used to solve the model.The damper dynamics testing platform is established and correlation analysis of main parameters on the temperature rise is presented.The results show that the current heating model can be used to predict the real surface temperature rise of damper under solar radiation.By varying the surface temperature from 60℃ to 85℃,the damping force is attenuated correspondingly from 10% to 12%.The surface temperature is increased by 2.7% in 3,000 s under the influence of the solar radiation.It will have bigger influence if the time is longer,the surface temperature rise can be depressed by increasing the effective area of the cylinder and relative velocity of air.