基于零件失效时间分布密度函数,建立了面向维护的凿岩机服役年龄模型,通过仿真与分析,探讨了零件失效时间分布密度函数的参数对凿岩机服役年龄及零件替换率的影响规律。这对定量评估凿岩机的可靠性和全生命周期的维护成本、制定合理的维护策略具有重要意义。 Based on the distribution function of failure time of parts, the service age model of rock drill for maintenance was established. Through the simulation and analysis, the influence law of parameters of the failure time distribution density function on the age of service and replacement rate of rock drill was discussed. This is of great significance to quantitatively evaluate the reliability and life-cycle maintenance costs of rock drills and formulate a reasonable maintenance strategy.