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This paper sets up a parameterized model of engine-bladed disk system. Then a method of mistuned parameter identification is proposed, which consists of static frequency test of blades, dichotomy, and finite element analysis. Dynamic genetic ant colony optimization combined algorithm is presented which is used as a bladed arrangement optimization method. It combines the advantage of ant colony algorithm and genetic algorithm. By this way, the local and global search ability is introduced and the disadvantage of a single algorithm is overcome. The improved parallel algorithm comes up with graphics processing unit based on compute unified device architecture and its performance is analyzed. The results show that using optimization results can reduce the amplitude and localization of forced vibration response of bladed-disk system. At the same time, optimization based on compute unified device architecture framework can improve computing speed. Providing support for engineering application in terms of effectiveness and efficiency.

This paper deals with the problem of getting dynamic characteristics in complex mechanical multi-body system. Based on the MFBD (Multi-Flexible-Body Dynamics) technology, the rigid-flexible coupling dynamic simulation method is proposed, and then the method is applied to the planetary gear transmission. The results show that the dynamic stress distribution of planetary gear can be obtained to determine the dangerous location, and the dynamic response characteristics are more obvious. Then the simulation model of planetary gear transmission with broken tooth is established, the fault feature extraction in time-frequency domain is carried out using the acceleration signal. In addition, industrial data is also used to validate the effectiveness of the proposed method.

In order to analyze the dynamics of the gear transmission more efficiently, this paper builds a three-dimensional modeling software Creo, finite element software Hypermesh and dynamics simulation software based on MFBD (Multi-Flexible-Body Dynamics) technology. RecurDyn established a multi-flexible body model, established a rigid-flexible, flexible-flexible gear pair model and verified its accuracy. The time-frequency domain curves and simulation speeds of the vibration accelerations of the two model flexible gears are compared and analyzed. The results show that the rigid-flexible gear pair model has certain advantages in the simulation. The simulation method can provide a basis for rigid-flexible coupling modeling of complex gear transmission systems. Where c n is the number of coordinates in the absolute coordinate system. The velocity of an object in a relative coordinate system can be expressed as:

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