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为了有效地进行航空发动机高压涡轮(HPT)叶尖径向运行间隙(BTRRC)设计,从概率的角度进行BTRRC的可靠性分析。根据BTRRC的结构特点,提出了高精度、高效率可靠性分析的分布式协同响应面法(DCRSM),以二次响应面函数为基础建立了DCRSM数学模型,并将DCRSM应用到航空发动机HPT BTRRC的可靠性分析中加以验证。结果显示:当稳态叶尖间隙δ=1.86mm时,BTRRC的可靠度为0.996 8,综合考虑发动机效率和可靠性,基本上满足BTRRC的设计和工程需要。通过方法比较显示了DCRSM在BTRRC可靠性分析中,不但能解决难以分析的问题,还能在保证计算精度的前提下提高计算速度和计算效率;充分验证了DCRSM在BTRRC可靠性分析中的有效性和可行性,为复杂机械可靠性分析和优化提供了有效依据。
In order to effectively design the blade tip radial clearance (BTRRC) of aeroengine HPT, the reliability analysis of BTRRC is carried out from the perspective of probability. According to the structural characteristics of BTRRC, a distributed collaborative response surface method (DCRSM) with high accuracy and high efficiency reliability analysis is proposed. Based on the quadratic response surface function, a mathematical model of DCRSM is established, and the DCRSM is applied to aeroengine HPT BTRRC Reliability analysis to be verified. The results show that the reliability of BTRRC is 0.996 8 when the steady-state tip clearance δ = 1.86mm, and basically meets the design and engineering requirements of BTRRC considering engine efficiency and reliability. The method comparison shows that DCRSM can not only solve difficult problems in the reliability analysis of BTRRC, but also improve computational speed and computational efficiency while ensuring the accuracy of calculation. The validity of DCRSM in BTRRC reliability analysis is fully verified And feasibility of complex mechanical reliability analysis and optimization provides an effective basis.