CN-122021124-A - Simulation data processing method and system of pile foundation soil interaction model

CN122021124ACN 122021124 ACN122021124 ACN 122021124ACN-122021124-A

Abstract

The invention relates to the technical field of data processing, in particular to a simulation data processing method and system of a pile foundation soil interaction model. The method comprises the steps of obtaining pile foundation contact pressure data sequences of a plurality of simulation working conditions of a pile foundation soil interaction model and wind load data sequences corresponding to each simulation working condition, determining preliminary complexity of the pile foundation contact pressure data sequences, determining distortion degree of the pile foundation contact pressure data sequences, determining self-adaptive mode quantity, processing the pile foundation contact pressure data sequences by using a self-adaptive variation mode decomposition algorithm, and realizing simulation data processing of the pile foundation soil interaction model. According to the invention, the pile foundation pressure data frequency spectrum is analyzed, the frequency spectrum entropy and the centroid index evaluation complexity are constructed, the cross power spectrum density evaluation distortion with wind load is calculated, the mode number is dynamically adjusted, and the accuracy and the applicability of pile foundation soil simulation data processing are improved.

Inventors

GUO ZEKUN
GUO ZHITAO
WANG YANCHEN
GUO YITAO
ZHAO YANLI
FU YANCONG

Assignees

山东中能杆塔有限公司

Dates

Publication Date: 20260512
Application Date: 20251229

Claims (10)

1. A simulation data processing method of a pile foundation soil interaction model is characterized by comprising the following steps: Obtaining pile foundation contact pressure data sequences of a plurality of simulation working conditions of a pile foundation soil interaction model and wind load data sequences corresponding to each simulation working condition; For each simulation working condition, determining the preliminary complexity of the pile foundation contact pressure data sequence according to the spectrum entropy and the spectrum centroid of the energy spectrum of the pile foundation contact pressure data sequence; Determining the distortion degree of the pile foundation contact pressure data sequence according to the preliminary complexity degree and the cross power spectral density between the pile foundation contact pressure data sequence and the corresponding wind load data sequence; determining the number of self-adaptive modes for a variation mode decomposition algorithm according to the distortion degree; Based on the self-adaptive modal number, processing the pile foundation contact pressure data sequence by using a variation modal decomposition algorithm to obtain a plurality of modal components; And taking the modal component with the greatest correlation with the corresponding wind load data sequence as the processed pile foundation contact pressure data to complete the simulation data processing of the pile foundation soil interaction model.
2. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the obtaining pile foundation contact pressure data sequences of a plurality of simulation conditions of the pile foundation soil interaction model and wind load data sequences corresponding to each simulation condition comprises: constructing a pile foundation soil interaction model by using finite element analysis software; Inputting different working condition parameter combinations to perform multiple simulation working condition calculations; And extracting pile soil contact interface normal contact pressure data of all sampling points along the depth of the pile body from a historical database of a pile foundation soil interaction model according to each simulation working condition to serve as a pile foundation contact pressure data sequence, and extracting a wind load time sequence applied to the top of the tower as a corresponding wind load data sequence.
3. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein after obtaining pile foundation contact pressure data sequences of a plurality of simulation working conditions of the pile foundation soil interaction model and wind load data sequences corresponding to each simulation working condition, the method further comprises: And carrying out normalization processing on the pile foundation contact pressure data sequence of each simulation working condition and the wind load data sequence corresponding to each simulation working condition so as to eliminate dimension influence.
4. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the preliminary complexity degree satisfies: ; In the formula, Is the first The preliminary complexity of pile foundation contact pressure data sequences of the simulation working conditions, And (3) with Respectively the first The frequency spectrum entropy and the frequency spectrum centroid of the energy spectrum of the pile foundation contact pressure data sequence under the simulation working condition, Is the first The energy spectrum of the pile foundation contact pressure data sequence of the simulation working condition, Is the first Pile foundation contact pressure data sequence energy spectrum of each simulation working condition The energy duty cycle of the frequency bins, As a total number of frequency bins, For the index of the frequency bin, As a function of the maximum and minimum normalization, Is a logarithmic function with a base of 2.
5. A method of analogue data processing of a pile foundation soil interaction model according to claim 1 or 4, wherein the energy spectrum is obtained by performing a fast fourier transform on the pile foundation contact pressure data sequence.
6. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the distortion degree satisfies: ; In the formula, Is the first The distortion degree of pile foundation contact pressure data sequences under the simulation working conditions, Is the first The preliminary complexity of pile foundation contact pressure data sequences of the simulation working conditions, Is the first The cross power spectral density between the pile foundation contact pressure data sequence and the corresponding wind load data sequence of each simulation working condition, And (3) with Respectively the first The power spectrum density of pile foundation contact pressure data sequences and corresponding wind load data sequences of the simulation working conditions, As a function of the maximum and minimum normalization, As a function of the natural index of refraction, Is an absolute value sign.
7. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the number of adaptive modes is as follows: ; In the formula, Is the first The number of adaptive modes for each simulation regime, For a preset lower limit value of the number of adaptive modes, To change the number of decomposition modes of the modal decomposition algorithm, Is the first The distortion degree of pile foundation contact pressure data sequences under the simulation working conditions, For the rounding operation.
8. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the step of processing the pile foundation contact pressure data sequence by using a variation modal decomposition algorithm further comprises: Setting the value of a punishment factor to be 1500-2500; setting the value of the time step to be 0-0.5; Setting the convergence tolerance value as ~ 。
9. The method for processing simulation data of a pile foundation soil interaction model according to claim 1, wherein the mode component having the greatest correlation with the corresponding wind load data sequence is used as the processed pile foundation contact pressure data, comprising: acquiring pearson correlation coefficients of all modal components and corresponding wind load data sequences; And selecting the mode component with the largest absolute value of the Pearson correlation coefficient as the processed pile foundation contact pressure data.
10. A simulation data processing system of a pile foundation soil interaction model, characterized by comprising a processor and a memory, the memory storing computer program instructions which, when executed by the processor, implement a simulation data processing method of a pile foundation soil interaction model according to any of claims 1-9.

Description

Simulation data processing method and system of pile foundation soil interaction model Technical Field The invention relates to the technical field of data processing, in particular to a simulation data processing method and system of a pile foundation soil interaction model. Background With the increasing demand of modern industry for energy and communication, high-rise structures such as transmission towers and communication towers become key infrastructure of the modern society, stability and safety of the high-rise structures are crucial, the foundation of the tower structure is a pile foundation, and bearing performance of the pile foundation is highly dependent on interaction between a pile body and surrounding soil. During engineering design and safety check, finite element numerical simulation is a common technology for analyzing pile foundation soil interaction, and key data such as stress, displacement and pile soil contact pressure of a pile foundation under working conditions such as wind load and earthquake can be obtained through simulation analysis. However, the mechanical behavior of the contact interface between the pile foundation and the soil is highly nonlinear, the convergence of the contact algorithm is extremely sensitive to input soil parameters such as friction coefficient and elastic modulus in the numerical simulation process, and when the parameters are improperly set or the model is difficult to converge, distortion data caused by numerical oscillation are often mixed in output pile foundation contact pressure simulation data, so that the follow-up accurate evaluation of key indexes such as pile side friction resistance is interfered. The variable modal decomposition (Variational Mode Decomposition, VMD) algorithm is an effective technology for processing complex time sequence data, the algorithm can decompose complex signals into a plurality of eigenvalue components with different center frequencies, but the traditional variable modal decomposition algorithm needs to preset a fixed decomposition modal number when applied, in a simulation scene of a tower pile foundation, characteristics of distorted data in simulation data can change along with simulation conditions, such as the change of soil parameters, the applicability of the algorithm is insufficient due to the fixed decomposition modal number, if the preset decomposition modal number is small, the algorithm cannot effectively separate real physical trend and numerical distortion to cause modal aliasing when data distortion is serious, the processed data can still be distorted, if the preset decomposition modal number is large, the algorithm can excessively decompose a complete redundant physical trend into a plurality of modes without practical physical significance when data distortion is not obvious, so that the complexity of data reconstruction is increased and calculation resources are wasted. Disclosure of Invention The invention provides a simulation data processing method and system of a pile foundation soil interaction model, aiming at solving the problems that the accuracy and applicability of the simulation data processing are affected by mode aliasing or mode redundancy caused by the dependence on the fixed decomposition mode quantity when the simulation data are processed by a traditional variation mode decomposition algorithm. In a first aspect, the invention provides a method for processing simulation data of a pile foundation soil interaction model, which adopts the following technical scheme: A simulation data processing method of a pile foundation soil interaction model comprises the steps of obtaining pile foundation contact pressure data sequences of a plurality of simulation working conditions of the pile foundation soil interaction model and wind load data sequences corresponding to each simulation working condition, determining preliminary complexity of the pile foundation contact pressure data sequences according to spectral entropy and spectral centroid of energy spectrums of the pile foundation contact pressure data sequences aiming at each simulation working condition, determining distortion degree of the pile foundation contact pressure data sequences according to the preliminary complexity and cross power spectral density between the pile foundation contact pressure data sequences and the corresponding wind load data sequences, determining adaptive mode quantity for a variation mode decomposition algorithm according to the distortion degree, processing the pile foundation contact pressure data sequences by using a variation mode decomposition algorithm based on the adaptive mode quantity, and obtaining a plurality of mode components, and taking the mode component with the largest correlation with the corresponding wind load data sequences as processed pile foundation contact pressure data to complete simulation data processing of the pile foundation soil interaction model. According to the inve