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我国《动力机器基础设计规范》(GB50040—96)是在对当时机组大量实测数据基础上并依据工程实践经验制定的,而如今机组的容量以及制造水平已大幅提高,机组与基础的形式也有了很大程度的不同.结合典型600MW汽机基础满负荷运行阶段的振动测试数据,对相应的基础结构进行了有限元分析,并与试验结果做了对比,从振动形态的角度来研究《动规》中动力特性参数的适用性,并提出对扰力和阻尼比取值的调整方案.相关工作可为规范修编提供参考.
China’s “basic design specifications for power machinery” (GB50040-96) is based on a large number of units at the time the actual measured data and based on engineering practice and experience developed, and now the unit capacity and manufacturing levels have increased dramatically, the unit and the basis of the form To a great extent different from that of the typical 600MW steam turbine.Based on the vibration test data of the typical 600MW steam turbine under full load operation stage, the finite element analysis of the corresponding basic structure is carried out and compared with the test results. From the aspect of vibrational mode, The applicability of the parameters of the dynamic characteristics, and propose the adjustment program of the values of the disturbing force and the damping ratio.The related work can provide references for the revision of the norms.