热辐射影响下磁流变阻尼器温升建模及试验

发布时间：2019-04-11 14:01

【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。
[Abstract]:In order to improve the dynamic performance of magnetorheological dampers in ocean engineering, the effect of solar thermal radiation on the surface temperature rise of Mr dampers is studied. Based on the analysis of the temperature rise principle of the damper, the surface temperature rise model of the magnetorheological damper is established based on the finite element simulation of magnetic field. The fourth-order Runge-Kutta method is used to solve the equation. A damping dynamic test platform for measuring surface temperature with resistance thermocouple is set up, and the correlation analysis of the main parameters affecting temperature rise is carried out. The results show that the temperature rise model and method can be used to predict the actual temperature rise state under the influence of surface heat radiation. When the surface temperature is 60 鈩，

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