【摘要】：為提高磁流變阻尼器在海洋工程復(fù)雜環(huán)境下的動(dòng)力學(xué)性能,研究太陽熱輻射對(duì)磁流變阻尼器表面溫升的影響。分析阻尼器的溫升原理,結(jié)合磁場(chǎng)有限元仿真建立磁流變阻尼器內(nèi)部做功與外部熱輻射混合作用的表面溫升模型,采用四階Runge-Kutta方法求解方程;搭建以電阻式熱電偶測(cè)量表面溫度的阻尼動(dòng)力學(xué)試驗(yàn)平臺(tái),并對(duì)影響溫升的主要參數(shù)進(jìn)行相關(guān)性分析。研究表明,所建溫升模型和方法可用于預(yù)測(cè)阻尼器表面熱輻射影響下的實(shí)際溫升狀態(tài),當(dāng)表面溫度為60℃~85℃時(shí),阻尼力衰減達(dá)10%~12%,3 000 s時(shí)間太陽熱輻射導(dǎo)致溫度升幅2.7%。長(zhǎng)時(shí)間熱輻射將對(duì)阻尼器減振性能產(chǎn)生較大影響,增大阻尼器缸筒有效面積和相對(duì)空氣流速可降低表面溫升。
[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，

本文編號(hào)：2456465