Distributed collaborative extremum response surface method for mechanical dynamic assembly reliability analysis

To make the dynamic assembly reliability analysis more effective for complex machinery of multi-object multi-discipline(MOMD),distributed collaborative extremum response surface method(DCERSM)was proposed based on extremum response surface method(ERSM).Firstly,the basic theories of the ERSM and DCERSM were investigated,and the strengths of DCERSM were proved theoretically.Secondly,the mathematical model of the DCERSM was established based upon extremum response surface function(ERSF).Finally,this model was applied to the reliability analysis of blade-tip radial running clearance(BTRRC)of an aeroengine high pressure turbine(HPT)to verify its advantages.The results show that the DCERSM can not only reshape the possibility of the reliability analysis for the complex turbo machinery,but also greatly improve the computational speed,save the computational time and improve the computational efficiency while keeping the accuracy.Thus,the DCERSM is verified to be feasible and effective in the dynamic assembly reliability(DAR)analysis of complex machinery.Moreover,this method offers an useful insight for designing and optimizing the dynamic reliability of complex machinery.

X-波段电子顺磁共振的微观有序宏观无序谱分析

相关时间和序参量是表征自旋探针标记大分子运动与分布的两个重要参数。用合适的物理模型,通过线型分析同时确定这些参数在电子顺磁共振谱的解析中非常有意义。文章应用微观有序宏观无序(MO-MD)模型,在X-波段对具有轴对称磁参量自旋探针的EPR谱进行了模拟计算,测量了波形的实验参数,比较了与经验公式分析的误差。对于MOMD谱,作者提出了分辨标准来筛选实验参数进行线型分析,以此确定了同时解析相关时间及内部序参量的有效区间。