非对称非均匀分布整形光束用于激光热负荷试验研究

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.

Abstract

The key point of laser thermal loading test is to simulate the real temperature field on the top surface of the cylinder head with an easy,controllable,effective and accurate way.A kind of non-symmetric and non-uniform shaped laser beam is chosen as the heat source to irradiate on the top surface of the cylinder head,the simulated temperature field is consistent with the real one.The high cycle and low cycle thermal loading tests are realized.The test results show that the thermal loading tests can be effectively carried out with the temperature and time control models,which can provide the foundation for the fatigue life prediction.

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聂树真, 孙辉, 虞钢, 樊仲维. 非对称非均匀分布整形光束用于激光热负荷试验研究[J]. 激光与光电子学进展, 2015, 52(9): 091408. Nie Shuzhen, Sun Hui, Yu Gang, Fan Zhongwei. Study on Laser Thermal Loading Test with Non-Symmetric and Non-Uniform Shaped Laser Beam[J]. Laser & Optoelectronics Progress, 2015, 52(9): 091408.

非对称非均匀分布整形光束用于激光热负荷试验研究

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