Indirect shafting torsional vibration dynamic characteristic modification method and device, equipment and medium

Abstract

The invention discloses an indirect shafting torsional vibration dynamic characteristic modification method and device, equipment and a medium. The method comprises the following steps: determining first dynamic flexibility data of a to-be-tested structure in a target power device; establishing a simulation model of an additional shafting structure corresponding to the to-be-tested structure; according to the first dynamic flexibility data and the dynamic flexibility matrix of the additional shafting structure, determining second dynamic flexibility data of a combined shafting composed of theto-be-measured structure and the additional shafting structure; judging whether the dynamic characteristic parameters corresponding to the second dynamic flexibility data meet the target dynamic characteristic parameters or not, if not, returning to execute the step of establishing the simulation model of the additional shafting structure corresponding to the to-be-tested structure until the target dynamic characteristic parameters are met, The problem of inaccurate shafting structure correction caused by calibration of a torsional vibration calculation model is avoided, the actual shafting improvement accuracy is improved, shafting torsional vibration resonance is avoided, and shafting safety is guaranteed.

Description

technical field [0001] This application relates to mechanics and vibration technology, in particular to a method, device, equipment and medium for modifying the torsional vibration dynamic characteristics of an indirect shafting system. Background technique [0002] With the continuous improvement of power plant performance and power demand targets, and the increasingly complex equipment and facilities, how to effectively ensure the reliability of the power plant system and quickly find design weak points on the basis of continuous improvement of power plant performance has become the focus. In the power system, the torsional vibration caused by the fluctuating torque of the transmitted power is an important part that affects the reliability of the power system. The ship power system, especially the main propulsion system, turbine propulsion and electric propulsion system with reciprocating machinery as power, often It is necessary to carry out torsional vibration calculatio...

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Problems solved by technology

[0003] In view of this, it is necessary to address the above technical problems and provide a method, device, equipment and medium for modifying the dynamic characteristics of indirect shafting torsional vibration, so as to avoid the problem of inaccurate shafting structure correction caused by the calibration of the torsional vibration calculation model , which improves the accuracy of the actual shaft improvement, avoids torsional vibration resonance of the shaft, and ensures the safety of the shaft

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