激光热负荷研究的关键在于简易、可控、高效、准确地模拟实际工况下零部件表面所承受的热负荷温度场分布,为此采用一种非对称非均匀分布整形光束作为热源加载气缸盖表面,数值模拟的温度场分布与实际工况下一致,并进行气缸盖不同功率下的高周和低周热负荷试验。试验结果表明,采用温度控制和时间控制模式可以有效进行高低周热负荷试验,此结果可为后期疲劳分析奠定基础。 The key point of laser thermal load research is to simulate the temperature distribution of heat load on the surface of parts under simple, controlled, efficient and accurate conditions. For this purpose, an asymmetric non-uniformly distributed shaped beam is used as the heat source to load the cylinder head The temperature field distribution of the surface and numerical simulation is consistent with the actual conditions, and the high and low cycle thermal load tests under different power of the cylinder head are carried out. The test results show that the temperature control and time control mode can effectively carry out high and low cycle heat load test, which can lay the foundation for the post-fatigue analysis.