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简要论述了双协调动态子结构法的动力学原理,并以Q485柴油机的曲轴飞轮系统为研究对象计算了系统扭转振动的模态参数。对BCDSP双协调动态子结构计算程序进行了重要修改,使其能有效地适用于小型计算机或微机。为了比较,对整体结构还用有限元法和试验模态分析识别模态参数,与本法所得结果相吻合。
The dynamic principle of the double-coordinated dynamic substructure method is briefly discussed, and the modal parameters of the torsional vibration of the system are calculated using the crankshaft flywheel system of the Q485 diesel engine as the research object. Major modifications have been made to the BCDSP dual-coordinated dynamic substructure calculation program to make it effective for small computers or microcomputers. For comparison, the modal parameters of the overall structure were also identified by the finite element method and experimental modal analysis, which is consistent with the results obtained by this method.