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为了研究ZJ70型钻机液压刹车盘温度场对应力场的影响,建立了刹车盘在制动过程中的热-机耦合仿真模型。通过对不同温度场下刹车盘进行数值仿真,得到了温度和应力分布;以固定参考点的方式分析了温度、应力及接触压力受温度场的影响情况、随时间的变化情况及云图分布规律。研究结果表明:刹车盘摩擦表面径向温度场梯度比周向温度场梯度大,且整个摩擦面的中部温度值最高;刹车盘摩擦表面轴向应力很小,周向应力大于径向应力,且在摩擦表面以压应力为主;摩擦表面最大接触压力分布在径向的中部,与温度场的变化规律相同。仿真结果为刹车盘优化设计提供了依据和参考。
In order to study the influence of temperature field of hydraulic brake disc of ZJ70 drilling rig on the stress field, a thermo-mechanical coupling simulation model of brake disc during braking is established. The temperature and stress distribution were obtained by numerical simulation of the brake disc under different temperature fields. The temperature, stress and contact pressure affected by the temperature field, the change with time and the cloud pattern were analyzed with fixed reference points. The results show that the gradient of the radial temperature field of the brake disc friction surface is larger than that of the circumferential temperature field, and the temperature of the middle part of the friction surface is the highest. The axial stress on the brake disc friction surface is small, the circumferential stress is larger than the radial stress, The friction surface is dominated by compressive stress. The maximum contact pressure on the friction surface is distributed in the middle of the radial direction, which is the same as that of the temperature field. The simulation results provide the basis and reference for the brake disc optimal design.