Equivalent time-domain model establishing method considering interaction of soil and fan system power

Abstract

The invention relates to an equivalent time-domain model establishing method considering interaction of soil and fan system power. The equivalent time-domain model establishing method comprises the following steps of S1, standardizing the vibration impedance of the interaction of soil and fan basic power, and expressing into dynamic compliance; S2, utilizing a Chebyshev complex polynomial to fit the dynamic compliance, expressing into a recursive function type, establishing a recursive physical model for expressing the interaction of soil and fan basic power, and determining to-be-determined coefficients of springs and dampers in the recursive physical model; S3, establishing the equivalent time-domain model considering the interaction of soil and fan system power. The equivalent time-domain model establishing method has the advantages that when the response of a fan system considering the interaction of soil and basic power under the horizontal excitation is calculated, because the recursive physical model does not contain mass elements, the correction of inputted basic horizontal power load is not needed, and the model is more directly and conveniently applied in actual engineering; by utilizing the recursive property, a motion control equation of the fan system has regularity, and the solving procedure is well universal.

Description

technical field [0001] The invention relates to a modeling method considering the effect of Soil-Structure Dynamic Interaction (SSDI), in particular to an equivalent time-domain model based on vibration impedance considering the dynamic interaction between soil and fan system and system. Background technique [0002] Wind energy has attracted the attention of the international energy community due to its non-polluting and renewable characteristics, and has gradually become the main form of power generation replacing traditional energy sources, building the cornerstone of low-carbon industrial strategy. my country has a long coastline, abundant offshore wind energy resources, and the power load centers are concentrated in the eastern coastal areas, so offshore wind power has broad development prospects in China. The foundation of the fan is the key part to ensure the stable operation of the unit, and it is mainly subjected to the horizontal excitation load under the action o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an equivalent time-domain model considering the dynamic interaction between the soil and the fan system with high calculation efficiency, convenient application and meeting the accuracy requirements for the vibration problem of the fan system under horizontal excitation, so as to solve the problem of vibration impedance Due to its frequency dependence, it cannot be directly used to solve the dynamic characteristics and time-series response of wind turbines considering SSDI effect under horizontal excitation

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