CN113779688A - Bucket foundation penetration analysis method and device and processing equipment - Google Patents
Bucket foundation penetration analysis method and device and processing equipment Download PDFInfo
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Abstract
The application provides a barrel-shaped foundation penetration analysis method, a barrel-shaped foundation penetration analysis device and processing equipment, which are used for obtaining high-efficiency analysis efficiency when the barrel-shaped foundation is subjected to penetration analysis. The method comprises the following steps: respectively establishing a three-dimensional finite element model for the bucket foundation and the soil body to be analyzed; respectively assigning values to the parameters of the soil body and the bucket foundation; respectively applying displacement boundary conditions and Euler boundary conditions to the bottom and the side of the soil body; setting the barrel-shaped foundation as a rigid body, and applying a displacement boundary condition on a reference point; applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analysis step, and applying gravity to complete the balance of the initial stress field; adjusting the vertical displacement of the reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body; and analyzing the simulation result to obtain a penetration resistance curve of the barrel foundation and a change curve of the soil plug body.
Description
Technical Field
The application relates to the field of geotechnical engineering, in particular to a bucket foundation injection analysis method, a device and processing equipment.
Background
In recent years, the bucket foundation is widely applied to projects such as ocean wind power, ocean deepwater anchors and coastal breakwaters, and compared with the traditional pile foundation, the bucket foundation has the advantages of simple structure, convenience in installation and the like, and is continuously applied to other project fields related to the pile foundation.
The sinking process of the bucket foundation comprises a self-weight sinking stage and a negative pressure sinking stage, whether the bucket foundation can sink to the designed depth directly influences the performance of the bearing capacity of the bucket foundation, and therefore the sinking performance of the bucket foundation needs to be analyzed.
The traditional penetration analysis is mainly developed through a model test, but is gradually replaced by a numerical simulation method due to the characteristics of long test period, high cost and the like. The existing commonly used numerical analysis methods mainly include an ALE technology and a RITSS technology, the technologies are based on a Lagrangian method basically, and the situation that convergence is difficult due to grid distortion in the process of simulating the bucket foundation to penetrate into the soil body can occur, so that a technology called CEL is provided, namely a Coupled Eulerian-Lagrangian (CEL) finite element method, and the method can effectively solve the situation of non-convergence in the penetration analysis.
In the existing research process of the related art, the inventor finds that the existing CEL analysis processing of the barrel foundation has the problem of long time consumption, namely, the processing efficiency is low.
Disclosure of Invention
The application provides a barrel-shaped foundation penetration analysis method, a barrel-shaped foundation penetration analysis device and processing equipment, which are used for obtaining high-efficiency analysis efficiency when the barrel-shaped foundation is subjected to penetration analysis.
In a first aspect, the present application provides a bucket foundation penetration analysis method, including:
respectively establishing a three-dimensional finite element model for a barrel-shaped foundation and a soil body to be analyzed, wherein the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
assigning values to the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, assigning values to the parameters of the barrel foundation, establishing a material section, and assigning the material section to the barrel foundation;
respectively applying displacement boundary conditions to the bottom and the side of the soil body, and applying Euler boundary conditions to the soil body, wherein the displacement boundary conditions of the bottom of the soil body are used for restricting the degrees of freedom in all directions, the boundary displacement conditions of the side of the soil body are used for restricting the degrees of freedom in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
setting the barrel-shaped foundation as a rigid body, and applying a displacement boundary condition on a reference point, wherein the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used for restricting the directional degree of freedom of the dwelling;
applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analysis step, and applying gravity to complete the balance of the initial stress field;
adjusting the vertical displacement of the reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body to accelerate the penetration process of the simulation bucket foundation;
and analyzing the simulation result to obtain a penetration resistance curve of the barrel foundation and a change curve of the soil plug body.
With reference to the first aspect of the present application, in a first possible implementation manner of the first aspect of the present application, the three-dimensional finite element model of the bucket foundation is a rotational symmetry model with a central axis of the bucket foundation as a symmetry axis.
Combine this application first aspect, in this application first aspect second possible implementation, the parameter of the soil body includes that density rho, elastic modulus are E, poisson's ratio mu, internal friction angle phi, cohesion force c, and the parameter on the bucket shape basis includes that density rho, elastic modulus are E.
With reference to the first aspect of the present application, in a third possible implementation manner of the first aspect of the present application, the damping force in the soil body is applied by calling a user subroutine DLOAD in the ABAQUS application program.
With reference to the first aspect of the present application, in a fourth possible implementation manner of the first aspect of the present application, the application of the damping force is determined by a function
Determining, wherein,
in order to obtain a numerical damping force,
in order to be a damping coefficient of the damping,
is between 0 and 1 and is selected from,
is the density of the soil mass material,
the node speed of the soil body unit is the node speed,
for the purpose of reference point speed,
is a unit volume.
With reference to the fourth possible implementation manner of the first aspect of the present application, in a fifth possible implementation manner of the first aspect of the present application, the damping coefficient
The selection of the soil body is determined by the condition that the kinetic energy ratio internal energy of the soil body is less than 10%.
With reference to the first aspect of the present application, in a sixth possible implementation manner of the first aspect of the present application, the analyzing and processing of the variation curve of the soil plug includes:
and selecting nodes on the top surface of the internal soil body of the barrel-shaped foundation to establish a node set of the father nodes of the tracer particles, and activating the tracer particles through specified sentences to obtain the displacement value of the soil plug body.
In a second aspect, the present application provides a bucket foundation penetration analysis apparatus comprising:
the device comprises an establishing unit, a calculating unit and a calculating unit, wherein the establishing unit is used for respectively establishing a three-dimensional finite element model for a barrel-shaped foundation and a soil body to be analyzed, the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
the evaluation unit is used for evaluating the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, evaluating the parameters of the barrel foundation, establishing a material section and assigning the material section to the barrel foundation;
the device comprises an applying unit, a control unit and a control unit, wherein the applying unit is used for applying displacement conditions to the bottom and the side of the soil body respectively and applying Euler boundary conditions to the soil body, the displacement conditions of the bottom of the soil body are used for restricting the freedom degrees in all directions, the displacement conditions of the side of the soil body are used for restricting the freedom degrees in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
the applying unit is also used for setting the barrel-shaped foundation as a rigid body and applying a displacement boundary condition on a reference point, wherein the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used for restricting the directional degree of freedom of the dwelling;
the applying unit is also used for applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analyzing step and applying gravity to finish the balance of an initial stress field;
the simulation unit is used for adjusting the vertical displacement of a reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body so as to accelerate the penetration process of the simulation bucket foundation;
and the analysis unit is used for analyzing the simulation result to obtain a penetration resistance curve of the barrel-shaped foundation and a change curve of the soil plug body.
In combination with the second aspect of the present application, in a first possible implementation manner of the second aspect of the present application, the three-dimensional finite element model of the bucket foundation is a rotational symmetry model with a central axis of the bucket foundation as a symmetry axis.
Combine this application second aspect, in this application second aspect second possible implementation, the parameter of the soil body includes density rho, elastic modulus E, poisson's ratio mu, internal friction angle phi, cohesion force c, and the parameter of bucket foundation includes density rho, elastic modulus E.
With reference to the second aspect of the present application, in a third possible implementation manner of the second aspect of the present application, the damping force in the soil body is applied by calling a user subroutine DLOAD in the ABAQUS application program.
In a fourth possible implementation manner of the second aspect of the present application in combination with the second aspect of the present application, the application of the damping force is performed by a function
Determining, wherein,
in order to obtain a numerical damping force,
in order to be a damping coefficient of the damping,
is between 0 and 1 and is selected from,
is the density of the soil mass material,
the node speed of the soil body unit is the node speed,
for the purpose of reference point speed,
is a unit volume.
With reference to the fourth possible implementation manner of the second aspect of the present application, in a fifth possible implementation manner of the second aspect of the present application, the damping coefficient
The selection of the soil body is determined by the condition that the kinetic energy ratio internal energy of the soil body is less than 10%.
With reference to the second aspect of the present application, in a sixth possible implementation manner of the second aspect of the present application, the analysis unit is specifically configured to:
and selecting nodes on the top surface of the internal soil body of the barrel-shaped foundation to establish a node set of the father nodes of the tracer particles, and activating the tracer particles through specified sentences to obtain the displacement value of the soil plug body.
In a third aspect, the present application provides a processing device, including a processor and a memory, where the memory stores a computer program, and the processor executes the method provided in the first aspect of the present application or any one of the possible implementation manners of the first aspect of the present application when calling the computer program in the memory.
In a fourth aspect, the present application provides a computer-readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the method provided in the first aspect of the present application or any one of the possible implementations of the first aspect of the present application.
From the above, the present application has the following advantageous effects:
aiming at the injection analysis of the bucket foundation, the application provides a new analysis mode, after corresponding three-dimensional finite element models are established for the bucket foundation and the soil body to be analyzed, the three-dimensional finite element models respectively corresponding to the bucket foundation and the soil body are respectively assigned, displacement boundary conditions or Euler boundary conditions are applied, then a predefined field of ground stress is applied to the soil body, the displacement of all nodes of the soil body is restrained in the first analysis step, gravity is applied to finish the balance of an initial stress field, the vertical displacement of the reference point of the bucket foundation is adjusted, the displacement boundary conditions of the soil body are recovered, damping force is applied to all nodes of the soil body to accelerate the injection process of the simulation bucket foundation, at the moment, the simulation result is analyzed to obtain the penetration resistance curve of the bucket foundation and the change curve of a soil plug body, in the process, the injection analysis process is effectively accelerated, and high analysis efficiency is obtained.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a barrel-based penetration analysis method according to the present application;
FIG. 2 is a schematic diagram of a scenario of a barrel-based penetration process according to the present application;
FIG. 3 is a schematic diagram of a scenario of a barrel-based penetration process according to the present application;
FIG. 4 is a schematic diagram of a deformation of a bucket foundation grid according to the analysis results of the present application;
FIG. 5 is a schematic diagram of penetration resistance of a bucket foundation in the analysis results of the present application;
FIG. 6 is a schematic view showing a variation in the height of a soil plug in the analysis result of the present application;
FIG. 7 is a schematic diagram of a variation of energy in the analysis results of the present application;
FIG. 8 is a schematic diagram of a comparison of analytical aging of a CEL processing scheme of the present application with a prior art CEL processing scheme;
FIG. 9 is a schematic view of a barrel-based penetration analysis apparatus according to the present application;
FIG. 10 is a schematic diagram of a processing apparatus according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Moreover, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus. The naming or numbering of the steps appearing in the present application does not mean that the steps in the method flow have to be executed in the chronological/logical order indicated by the naming or numbering, and the named or numbered process steps may be executed in a modified order depending on the technical purpose to be achieved, as long as the same or similar technical effects are achieved.
The division of the modules presented in this application is a logical division, and in practical applications, there may be another division, for example, multiple modules may be combined or integrated into another system, or some features may be omitted, or not executed, and in addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, and the indirect coupling or communication connection between the modules may be in an electrical or other similar form, which is not limited in this application. The modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed in a plurality of circuit modules, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present disclosure.
Before describing the barrel-based penetration analysis method provided by the present application, the background to which the present application is directed will be described first.
The bucket foundation penetration analysis method, the bucket foundation penetration analysis device and the computer-readable storage medium can be applied to processing equipment and are used for obtaining high-efficiency analysis efficiency when the bucket foundation is subjected to penetration analysis.
In the bucket-based penetration analysis method mentioned in the present application, the execution main body may be the apparatus, or different types of processing devices such as a server, a physical host, or a User Equipment (UE) integrated with the apparatus. The barrel-shaped foundation penetration analysis device can be realized in a hardware or software mode, the UE can be a terminal device such as a smart phone, a tablet computer, a notebook computer, a desktop computer or a Personal Digital Assistant (PDA), and the processing device can be set in a device cluster mode.
Next, a method of the bucket foundation penetration analysis provided by the present application will be described.
First, referring to fig. 1, fig. 1 shows a schematic flow chart of a method for analyzing a barrel-shaped foundation according to the present application, and the method for analyzing a barrel-shaped foundation according to the present application may specifically include the following steps S101 to S107:
step S101, establishing three-dimensional finite element models for a barrel-shaped foundation and a soil body to be analyzed respectively, wherein the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
it can be understood that the penetration analysis of the bucket foundation relates to both the bucket foundation and the soil mass to be penetrated by the statistical foundation, that is, the penetration analysis needs to be performed in combination with both the bucket foundation and the soil mass.
The penetration analysis, which may also be referred to as penetration analysis, is specifically used for analyzing a process of a bucket foundation penetrating into a soil body.
Meanwhile, the present application relates to a penetration analysis, which starts from a three-dimensional finite element model.
The three-dimensional finite element model is a model which is built for a barrel-shaped foundation or a soil body by applying a finite element analysis method from a three-dimensional angle, and can be understood as a unit combination which is only connected at nodes, only transfers force by the nodes and is only restrained at the nodes.
Meanwhile, regarding the three-dimensional finite element model of the bucket foundation, the component type thereof is lagrangian body, and the component type thereof is euler body.
Wherein, as an example, the barrel-shaped foundation has a height of 25m, a diameter of 5m and a thickness of 35 mm; the width of the soil body is 30m, the thickness is 55m, wherein the thickness of the top hollow unit is 5 m.
It is understood that after the barrel-shaped foundation and the three-dimensional finite element model of the soil body are created, the subsequent processing is developed based on the three-dimensional finite element models of the barrel-shaped foundation and the soil body, and the subsequent data processing is carried out on the basis of the corresponding three-dimensional finite element model even when the barrel-shaped foundation or the soil body is mentioned but the three-dimensional finite element model is not mentioned.
As a practical implementation manner, in the present application, a three-dimensional finite element model of a barrel-shaped foundation is constructed, specifically, a rotational symmetry model with a central axis of the barrel-shaped foundation as a symmetry axis.
It can be understood that, in the process of constructing the three-dimensional finite element model of the bucket foundation, the model can be constructed specifically along the length direction (central axis direction) of the bucket foundation according to the rotational symmetry principle, so that a smoother and true construction effect can be obtained.
Step S102, assigning values to the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, assigning values to the parameters of the barrel foundation, establishing a material section, and assigning the material section to the barrel foundation;
after the three-dimensional finite element model is established, the model can be subjected to parameter assignment continuously.
It is to be understood that in the present application, the assignment of parameters is specified in units of cross-sections.
As an example, the present application refers to some material parameters, which can be referred to in the following table 1:
TABLE 1 Material parameters
Specifically, as an example, in practical application, the parameters of the soil body specifically include density ρ, elastic modulus Ε, poisson ratio μ, internal friction angle Φ, cohesion force c; the parameters of the bucket foundation may specifically include density ρ, modulus of elasticity e.
Step S103, respectively applying displacement boundary conditions to the bottom and the side of the soil body, and applying Euler boundary conditions to the soil body, wherein the displacement boundary conditions of the bottom of the soil body are used for restricting the degrees of freedom in all directions, the displacement conditions of the side of the soil body are used for restricting the degrees of freedom in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
it can be understood that in the dynamic process of the bucket foundation penetrating into the soil body, different positions of the bucket foundation and the soil body all relate to corresponding displacement processes, and for the displacement scene, a displacement boundary condition can be applied to restrict the displacement boundary range on the data processing level.
For the soil, the constraint of the boundary range of the displacement not only includes the freedom degrees of all directions considered from the bottom of the soil, but also includes the freedom degrees of all directions except the numerical direction considered from the side of the soil.
In addition, for the soil body, Euler boundary conditions can be applied, which are constrained as follows: the bottom and sides are provided as non-reflective boundaries.
Step S104, setting the barrel-shaped foundation as a rigid body, and applying a displacement boundary condition on a reference point, wherein the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used for restricting the directional degree of freedom of the residence;
for the bucket foundation, corresponding to the displacement process involved in the dynamic process of the bucket foundation penetrating into the soil body, corresponding displacement boundary conditions can be applied to restrict the degrees of freedom of all directions of the reference point on the bucket foundation.
Further, for the bucket foundation, it is also set as a rigid body.
Step S105, applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analysis step, and applying gravity to complete the balance of an initial stress field;
in addition, for the soil body, the method also configures the environmental conditions of the ground stress, restrains the displacement of the soil body in the initial stage of the simulation process, namely the first analysis step, combines the continuously configured gravity to complete the balance of the stress field of the soil body, and perfects the conditions for subsequent simulation treatment.
S106, adjusting the vertical displacement of a reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body to accelerate the penetration process of the simulation bucket foundation;
in the process of simulating the penetration of the bucket foundation, the penetration process of the bucket foundation in a real application environment can be restored by controlling the displacement of the reference point on the bucket foundation in the vertical direction.
As an example, the vertical displacement of the reference point of the adjustable bucket foundation part is-20.18 m, i.e. 20.18m downwards.
Specifically, the simulated barrel-shaped foundation penetration process may be referred to in conjunction with a scenario diagram of the barrel-shaped foundation penetration process of the present application shown in fig. 2.
It should be understood, however, that in this application, the barrel-shaped base penetration analysis processing scheme provided by this application can be summarized as a barrel-shaped base penetration analysis processing scheme based on the dynamic relaxation method and the CEL processing technology by applying damping force (including the numerical damping force mentioned below) to the three-dimensional finite element model to accelerate the processing of the dynamic nonlinear analysis process, which may also be referred to as "dynamic relaxation method".
As a further practical implementation, the damping forces applied to all nodes of the soil body referred to herein may be applied, in particular, by calling the user subroutine DLOAD in the ABAQUS application.
It will be appreciated that in performing the application of the damping force, data may be imported into the ABAQUS application and the damping force applied via its user subroutine DLOAD;
of course, for the above-mentioned partial data processing, it can also be processed in the application environment of the ABAQUS application program.
Further, as yet another practical implementation, the application of damping forces herein may be specifically configured by the present application
Determining, wherein,
in order to obtain a numerical damping force,
in order to be a damping coefficient of the damping,
is between 0 and 1 and is selected from,
is the density of the soil mass material,
the node speed of the soil body unit is the node speed,
for the purpose of reference point speed,
is a unit volume.
Wherein the damping force determining function
Medium damping coefficient
In practical application, the specific energy of the soil mass is less than 10% condition was determined.
As an example, the damping coefficient
The value of (d) may be specifically 0.65.
And S107, analyzing the simulation result to obtain a penetration resistance curve of the barrel foundation and a change curve of the soil plug body.
After the simulation of the penetration process of the bucket foundation is completed and the bucket foundation is penetrated to the target position, the simulation result of the penetration process can be analyzed.
It should be understood that, for the analysis of the simulation result, the simulation result refers to the data monitored in the barrel-based penetration process, and the analysis process is finally the analysis process of uniformly combing, fusing, etc. all the previous simulation results so as to obtain the analysis result which can be finally used for output.
In the application, the analysis result of the penetration process of the bucket foundation specifically includes two kinds of index data, namely a penetration resistance curve of the bucket foundation and a change curve of the soil plug body.
As another practical implementation, the analysis process of the variation curve of the soil plug, or the monitoring process thereof, may specifically be implemented as follows:
and selecting nodes on the top surface of the internal soil body of the barrel-shaped foundation to establish a node set of the father nodes of the tracer particles, and activating the tracer particles through specified sentences to obtain the displacement value of the soil plug body.
It can be understood that, in practical application, the change curve of the soil plug body is obtained through the method, and the method can be realized through tracer particle processing.
As an example, the activation statement of trace particle processing may specifically be as follows:
*Tracer Particle，Tracer set = test
Set-test
*Output，Field
*Node Output，Tracer Set = test
U
to further understand the above, reference may also be made to fig. 3, which illustrates a scenario of the barrel foundation penetration process, which is shown in the present application, and which can be seen in fig. 3, and which relates to the above-mentioned exemplary rotationally symmetrically arranged three-dimensional finite element model of the barrel foundation, the parameter assignment of each component of the soil body, the reference point selection of the barrel foundation, the selection of the tracer particle parent node, and the like.
The analysis result of the simulation result may further refer to fig. 4 to 7, which show schematic diagrams of the analysis result of the present application, wherein fig. 4 is a schematic diagram of a deformation of a mesh of a bucket foundation in the analysis result of the present application, fig. 5 is a schematic diagram of a penetration resistance of a bucket foundation in the analysis result of the present application, fig. 6 is a schematic diagram of a change in a height of a soil plug in the analysis result of the present application, and fig. 7 is a schematic diagram of a change in energy in the analysis result of the present application.
From fig. 4 to fig. 7, it can be found that the analysis result of the present application conforms to the actual situation, and the energy result of the soil body in fig. 6 shows that the internal energy/kinetic energy is less than 10%, and the injection analysis of the bucket foundation conforms to the requirement, which indicates that the optimized CEL processing scheme of the present application can effectively solve the problem of difficult convergence of large deformation of the rock-soil injection analysis.
Further, referring to fig. 8, a comparison of the analysis aging of the CEL processing scheme of the present application with the existing CEL processing scheme, it can be seen that the analysis efficiency of the barrel-shaped foundation penetration is made more efficient when the CEL processing scheme of the present application (corresponding to the "dynamic relaxation" processing scheme of the present application mentioned in fig. 8) is applied.
As can be seen from the embodiment shown in fig. 1, for the penetration analysis of the bucket foundation, the present application proposes a new analysis method, after establishing corresponding three-dimensional finite element models for the bucket foundation and the soil body to be analyzed, assigning values to the three-dimensional finite element models respectively corresponding to the bucket foundation and the soil body, applying a displacement boundary condition or euler boundary condition, applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in a first analysis step, applying gravity to complete the balance of an initial stress field, adjusting the vertical displacement of a reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, applying damping force to all nodes of the soil body to accelerate the penetration process of the simulation bucket foundation, analyzing the simulation result at this time to obtain a penetration resistance curve of the bucket foundation and a change curve of a soil plug body, in this process, the penetration analysis process is effectively accelerated, and high-efficiency analysis efficiency is obtained.
The above is the introduction of the penetration analysis method of the barrel-shaped foundation provided by the application, and the penetration analysis method of the barrel-shaped foundation provided by the application is convenient for better implementation, and the application also provides a penetration analysis device of the barrel-shaped foundation from the perspective of a functional module.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a barrel-based penetration analysis apparatus of the present application, in which the barrel-based penetration analysis apparatus 900 may specifically include the following structures:
the establishing unit 901 is configured to establish a three-dimensional finite element model for the bucket foundation and the soil body to be analyzed, respectively, where the component type of the bucket foundation is lagrangian body, and the component type of the soil body is euler body;
an assigning unit 902, configured to assign values to the parameters of the soil, establish an euler material cross section, assign the euler material cross section to the soil, assign values to the parameters of the bucket foundation, establish a material cross section, and assign the material cross section to the bucket foundation;
an applying unit 903, configured to apply displacement conditions to the bottom and the side of a soil body, respectively, and apply euler boundary conditions to the soil body, where the displacement conditions of the bottom of the soil body are used to constrain degrees of freedom in all directions, the displacement conditions of the side of the soil body are used to constrain degrees of freedom in all directions except a vertical direction, and the euler boundary conditions of the soil body are used to set the bottom and the side as non-reflective boundaries;
an applying unit 903, configured to set the barrel-shaped foundation as a rigid body, and apply a displacement boundary condition on a reference point, where the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used to constrain the directional degree of freedom;
the applying unit 903 is further used for applying a predefined field of ground stress to the soil body, constraining displacement of all nodes of the soil body in the first analysis step, and applying gravity to complete balance of an initial stress field;
the simulation unit 904 is used for adjusting the vertical displacement of the reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body so as to accelerate the penetration process of the simulation bucket foundation;
and the analysis unit 905 is used for analyzing the simulation result to obtain a penetration resistance curve of the barrel foundation and a change curve of the soil plug body.
In an exemplary implementation, the three-dimensional finite element model of the bucket foundation is a rotationally symmetric model with the central axis of the bucket foundation as the axis of symmetry.
Combine this application second aspect, in this application second aspect second possible implementation, the parameter of the soil body includes density rho, elastic modulus E, poisson's ratio mu, internal friction angle phi, cohesion force c, and the parameter of bucket foundation includes density rho, elastic modulus E.
In yet another exemplary implementation, the damping force in the soil is applied by calling a user subroutine DLOAD in the ABAQUS application.
In yet another exemplary implementation, the application of the damping force is a function of
Determining, wherein,
in order to obtain a numerical damping force,
in order to be a damping coefficient of the damping,
value ofIn the range of 0 to 1, the content of the organic solvent,
is the density of the soil mass material,
the node speed of the soil body unit is the node speed,
for the purpose of reference point speed,
is a unit volume.
In yet another exemplary implementation, the damping coefficient
The selection of the soil body is determined by the condition that the kinetic energy ratio internal energy of the soil body is less than 10%.
In another exemplary implementation manner, the analysis unit 905 is specifically configured to:
and selecting nodes on the top surface of the internal soil body of the barrel-shaped foundation to establish a node set of the father nodes of the tracer particles, and activating the tracer particles through specified sentences to obtain the displacement value of the soil plug body.
The present application further provides a processing device from a hardware structure perspective, referring to fig. 10, fig. 10 shows a schematic structural diagram of the processing device of the present application, specifically, the processing device of the present application may include a processor 1001, a memory 1002, and an input/output device 1003, where the processor 1001 is configured to implement the steps of the barrel-based penetration analysis method in the corresponding embodiment of fig. 1 when executing the computer program stored in the memory 1002; alternatively, the processor 1001 is configured to implement the functions of the units in the embodiment corresponding to fig. 9 when executing the computer program stored in the memory 1002, and the memory 1002 is configured to store the computer program required by the processor 1001 to execute the barrel-based penetration analysis method in the embodiment corresponding to fig. 1.
Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in the memory 1002 and executed by the processor 1001 to accomplish the present application. One or more modules/units may be a series of computer program instruction segments capable of performing certain functions, the instruction segments being used to describe the execution of a computer program in a computer device.
The processing devices may include, but are not limited to, a processor 1001, a memory 1002, and an input-output device 1003. It will be appreciated by those skilled in the art that the illustration is merely an example of a processing device and does not constitute a limitation of a processing device and may include more or less components than those illustrated, or some components may be combined, or different components, e.g. the processing device may also include a network access device, a bus, etc. through which the processor 1001, the memory 1002, the input output device 1003, etc. are connected.
The Processor 1001 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center for the processing device and the various interfaces and lines connecting the various parts of the overall device.
The memory 1002 may be used to store computer programs and/or modules, and the processor 1001 implements various functions of the computer device by running or executing the computer programs and/or modules stored in the memory 1002 and calling data stored in the memory 1002. The memory 1002 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the processing apparatus, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The processor 1001, when executing the computer program stored in the memory 1002, may specifically implement the following functions:
respectively establishing a three-dimensional finite element model for a barrel-shaped foundation and a soil body to be analyzed, wherein the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
assigning values to the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, assigning values to the parameters of the barrel foundation, establishing a material section, and assigning the material section to the barrel foundation;
respectively applying displacement boundary conditions to the bottom and the side of the soil body, and applying Euler boundary conditions to the soil body, wherein the displacement boundary conditions of the bottom of the soil body are used for restricting the degrees of freedom in all directions, the boundary displacement conditions of the side of the soil body are used for restricting the degrees of freedom in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
setting the barrel-shaped foundation as a rigid body, and applying a displacement boundary condition on a reference point, wherein the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used for restricting the directional degree of freedom of the dwelling;
applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analysis step, and applying gravity to complete the balance of the initial stress field;
adjusting the vertical displacement of the reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body to accelerate the penetration process of the simulation bucket foundation;
and analyzing the simulation result to obtain a penetration resistance curve of the barrel foundation and a change curve of the soil plug body.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described barrel-based penetration analysis apparatus, the processing device and the corresponding units thereof may refer to the description of the barrel-based penetration analysis method in the embodiment corresponding to fig. 1, and are not described herein again in detail.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.
For this reason, the present application provides a computer-readable storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps of the bucket foundation penetration analysis method in the embodiment corresponding to fig. 1 in the present application, and specific operations may refer to the description of the bucket foundation penetration analysis method in the embodiment corresponding to fig. 1, which is not repeated herein.
Wherein the computer-readable storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the computer-readable storage medium can execute the steps of the bucket foundation penetration analysis method in the embodiment corresponding to fig. 1, the beneficial effects that can be achieved by the bucket foundation penetration analysis method in the embodiment corresponding to fig. 1 can be achieved, and the detailed description is omitted here.
The method, the apparatus, the processing device and the computer-readable storage medium for bucket foundation penetration analysis provided by the present application are described in detail above, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method of bucket foundation penetration analysis, the method comprising:
establishing a three-dimensional finite element model for a barrel-shaped foundation and a soil body to be analyzed respectively, wherein the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
assigning values to the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, assigning values to the parameters of a barrel foundation, establishing a material section, and assigning the material section to the barrel foundation;
respectively applying displacement boundary conditions to the bottom and the side of the soil body, and applying Euler boundary conditions to the soil body, wherein the displacement boundary conditions of the bottom of the soil body are used for restricting the degrees of freedom in all directions, the boundary displacement conditions of the side of the soil body are used for restricting the degrees of freedom in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
setting the barrel-shaped foundation as a rigid body, and applying a displacement boundary condition on a reference point, wherein the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used for restricting the directional degree of freedom of the dwelling;
applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in a first analysis step, and applying gravity to complete the balance of an initial stress field;
adjusting the vertical displacement of the reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body to accelerate the simulation of the penetration process of the bucket foundation;
and analyzing the simulation result to obtain a penetration resistance curve of the barrel-shaped foundation and a change curve of the soil plug body.
2. The method of claim 1, wherein the three-dimensional finite element model of the bucket foundation is a rotationally symmetric model having a central axis of the bucket foundation as an axis of symmetry.
3. The method of claim 1, characterized in that the soil parameters include density p, modulus of elasticity e, poisson's ratio μ, internal friction angle Φ, cohesion force c, and bucket foundation parameters include density p, modulus of elasticity e.
4. The method of claim 1, wherein the damping force in the soil mass is applied by calling a user subroutine DLOAD in the ABAQUS application.
5. The method of claim 1, wherein the application of the damping force is a function of
Determining, wherein,
in order to obtain a numerical damping force,
in order to be a damping coefficient of the damping,
is between 0 and 1 and is selected from,
is the density of the soil mass material,
the node speed of the soil body unit is the node speed,
for the purpose of reference point speed,
is a unit volume.
6. The method of claim 5, wherein the damping coefficient
The selection of the soil body is determined by the condition that the kinetic energy ratio internal energy of the soil body is less than 10%.
7. The method according to claim 1, wherein the analysis processing of the variation curve of the soil plug body comprises:
and selecting nodes on the top surface of the internal soil body of the barrel-shaped foundation to establish a node set of a tracer particle father node, and activating tracer particles through specified sentences to obtain a displacement value of the soil plug body.
8. A barrel-based penetration analysis apparatus, the apparatus comprising:
the device comprises an establishing unit, a calculating unit and a calculating unit, wherein the establishing unit is used for respectively establishing a three-dimensional finite element model for a barrel-shaped foundation and a soil body to be analyzed, the component type of the barrel-shaped foundation is a Lagrange body, and the component type of the soil body is an Euler body;
the evaluation unit is used for evaluating the parameters of the soil body, establishing an Euler material section, assigning the Euler material section to the soil body, evaluating the parameters of a barrel-shaped foundation, establishing a material section and assigning the material section to the barrel-shaped foundation;
the application unit is used for respectively applying displacement conditions to the bottom and the side of the soil body and applying Euler boundary conditions to the soil body, wherein the displacement conditions of the bottom of the soil body are used for restricting the degrees of freedom in all directions, the displacement conditions of the side of the soil body are used for restricting the degrees of freedom in all directions except the vertical direction, and the Euler boundary conditions of the soil body are used for setting the bottom and the side as non-reflection boundaries;
the applying unit is further configured to set the barrel-shaped foundation as a rigid body and apply a displacement boundary condition on a reference point, where the displacement boundary condition applied by the reference point of the barrel-shaped foundation is used to constrain the degree of freedom in all directions;
the applying unit is also used for applying a predefined field of ground stress to the soil body, constraining the displacement of all nodes of the soil body in the first analyzing step and applying gravity to finish the balance of an initial stress field;
the simulation unit is used for adjusting the vertical displacement of a reference point of the bucket foundation, recovering the displacement boundary condition of the soil body, and applying damping force to all nodes of the soil body so as to accelerate the simulation of the penetration process of the bucket foundation;
and the analysis unit is used for analyzing the simulation result to obtain a penetration resistance curve of the barrel-shaped foundation and a change curve of the soil plug body.
9. A processing device comprising a processor and a memory, a computer program being stored in the memory, the processor performing the method according to any of claims 1 to 7 when calling the computer program in the memory.
10. A computer-readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the method of any one of claims 1 to 7.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110008523A (en) * | 2019-03-12 | 2019-07-12 | 东南大学 | A kind of ground numerical simulation of excavation method for CEL method |
| CN110135125A (en) * | 2019-01-30 | 2019-08-16 | 天津大学前沿技术研究院 | Numerical analysis method of the drill ship pitching pile to neighbouring grouped piles influence under a kind of horizontal force |
| US20190304180A1 (en) * | 2016-06-08 | 2019-10-03 | Technische Universität München | Method and System for Generating a Mesh |
| CN110377935A (en) * | 2019-06-06 | 2019-10-25 | 上海交通大学 | Prediction technique of the pile peripheral earth excess pore water pressure along change in depth in pile driving process |
| CN110826139A (en) * | 2019-11-18 | 2020-02-21 | 天津大学前沿技术研究院 | Method for evaluating interaction influence of pile inserting under horizontal force on adjacent pile groups |
| US20200088692A1 (en) * | 2015-08-21 | 2020-03-19 | The Boeing Company | Analysis of a structure modeled with inconsistencies mapped thereon |
-
2021
- 2021-11-10 CN CN202111323147.0A patent/CN113779688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200088692A1 (en) * | 2015-08-21 | 2020-03-19 | The Boeing Company | Analysis of a structure modeled with inconsistencies mapped thereon |
| US20190304180A1 (en) * | 2016-06-08 | 2019-10-03 | Technische Universität München | Method and System for Generating a Mesh |
| CN110135125A (en) * | 2019-01-30 | 2019-08-16 | 天津大学前沿技术研究院 | Numerical analysis method of the drill ship pitching pile to neighbouring grouped piles influence under a kind of horizontal force |
| CN110008523A (en) * | 2019-03-12 | 2019-07-12 | 东南大学 | A kind of ground numerical simulation of excavation method for CEL method |
| CN110377935A (en) * | 2019-06-06 | 2019-10-25 | 上海交通大学 | Prediction technique of the pile peripheral earth excess pore water pressure along change in depth in pile driving process |
| CN110826139A (en) * | 2019-11-18 | 2020-02-21 | 天津大学前沿技术研究院 | Method for evaluating interaction influence of pile inserting under horizontal force on adjacent pile groups |
Non-Patent Citations (4)
| Title |
|---|
| STAUBACH P 等: "Vibratory pile driving in water-saturated sand: Back-analysis of model tests using a hydro-mechanically coupled CEL method", 《SOILS AND FOUNDATIONS》 * |
| 侯英伟 等: "基于 CEL 方法的混凝土板桩静压贯入减阻方法研究", 《中国农村水利水电》 * |
| 孙彦晓: "大型沉井下沉对土体变形影响的研究", 《中国优秀硕士学位论文全文数据库基础科学辑》 * |
| 张金利 等: "鱼雷锚贯入土体过程数值分析", 《水利与建筑工程学报》 * |
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