Output-based semi-submersible ocean platform energy transfer path analysis method

Abstract

The invention discloses an output-based semi-submersible ocean platform energy transfer path analysis method, which comprises the following steps of: arranging acceleration sensors at a vibration source and a target point to form an array, performing characteristic component analysis on a signal at the vibration source by utilizing a short-time Prony method based on a state space model, and determining a characteristic frequency; dispersing signals at a vibration source and a target point, introducing a first-order matrix differential equation by utilizing a complex exponential decomposition technology, and extracting signals at a characteristic frequency; solving a correlation coefficient of the reconstructed signal near the characteristic frequency, and extracting a characteristic component; calculating the amplitude of the characteristic component, substituting the amplitude into a formula to solve the transmissibility, and drawing the transmissibility spatial distribution map spatially to obtain the change rule of the transmissibility of the characteristic signal component in the whole spatial range so as to reveal the characteristic signal transmission condition. The method only depends on output response signals obtained through testing, and measurement of exciting force and a transfer function in a traditional method is avoided.

Description

Technical field [0001] The invention relates to an output-based energy transmission path analysis method of a semi-submersible ocean platform. Background technique [0002] At present, the energy transfer path analysis (TPA) of the structure is mainly divided into two directions, one is based on the time domain and frequency domain transfer function TPA method of the vibration source and the target element, by decomposing the components transmitted to the target element from multiple input sources, Determine the main transfer path of energy; the other is the TPA method based on transfer weight, which uses the coupling characteristics between adjacent structures to characterize the transfer coefficient of the path, and searches for the path from the vibration source to the target element according to the connection relationship between the subsystems . Theoretically, the traditional TPA method can be used to analyze the energy transfer path of marine engineering structures. Howev...

AI Technical Summary

Problems solved by technology

However, in the traditional energy path analysis method, the measurement of the frequency response function cannot be avoided

Although this technology is relatively mature, when measuring the frequency response function, the active part of the system must be removed, which is very time-consuming, and the boundary conditions of the measurement part are no longer accurate

At the same time, in the process of measuring force, a large space is required to install complex devices, and a special support arm is required to install measurement sensors, which is extremely inconvenient when applied to marine engineering

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