对海洋钻井绞车用水冷式制动盘,建立了三维瞬态热-机耦合理论模型和有限元分析模型.运用有限元分析软件ABAQUS,对钻井绞车紧急制动工况进行了数值模拟,分析了制动盘瞬态温度场分别在半径方向、周向和不同厚度处的分布特征和变化规律.计算结果表明:紧急制动时,制动盘在径向与周向均存在很大的温度梯度,相比之下,径向的温度梯度更大;制动结束时刻,温度的影响层深度很浅,盘面瞬时温度很高且高温区域集中在制动盘摩擦表面的中部区域.很高的盘面温度在短时间得不到消散是导致制动盘高温氧化的重要原因.%Theoretical model and FEM of three-dimensional transient thermo-mechanical coupling of the water-cooing brake disc for offshore drilling drawworks are established, with the real conditions of the brake disc taken into account. By using FEA software ABAQUS, an emergency braking condition is simulated, and distribution characteristics and variation disciplinarian of transient temperature distribution in radial, circular and thickness are analyzed respectively. Simulation results reveal that temperature gradient in radial direction is larger than that in circular direction at an emergency braking. Besides, at the end of braking, the depth of temperature influence layer is small and transient temperature on the disc surface is very high. What's more, the high temperature zone will concentrate in the middle of the friction area of the brake disc. The very high temperature, which can not be abreacted in a short time on the surface, is a very important reason for the high-temperature oxidation of the brake disc.
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