CN113673047A - Simulation method of energy storage container hoisting rope and related equipment - Google Patents
Simulation method of energy storage container hoisting rope and related equipment Download PDFInfo
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- CN113673047A CN113673047A CN202110847993.6A CN202110847993A CN113673047A CN 113673047 A CN113673047 A CN 113673047A CN 202110847993 A CN202110847993 A CN 202110847993A CN 113673047 A CN113673047 A CN 113673047A
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- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 15
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
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- G06F2111/04—Constraint-based CAD
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The application provides a simulation method and related equipment for hoisting ropes of an energy storage container, wherein the method comprises the following steps: building rope models according to the actual rope installation angle and length, wherein one end of each rope model is infinitely close to but not in common with a node, and the other end of each rope model is connected with a hoisting point on the energy storage container model; applying a first boundary condition, and respectively applying displacement along the length direction of each rope so as to make calculation converge; performing rope tension analysis; removing the first boundary condition, applying a second boundary condition, and applying gravity acceleration to the whole model; and (6) carrying out hoisting analysis. This application establishes rope model according to actual rope installation angle and length, can simulate out operating modes such as product mass distribution is inhomogeneous, product slope to simulate out the inward pretightning force of rope, thereby make the simulation analysis result more accurate.
Description
Technical Field
The invention relates to an energy storage container hoisting simulation technology, in particular to a simulation method of an energy storage container hoisting rope and related equipment.
Background
Along with the rapid development of energy storage trade, the energy storage container electric quantity memory space that uses now is big more, the container is also bigger and bigger, it is more and more heavy, the hoist and mount problem that appears unloading at the loading also arouses the attention gradually, the problem of hoist and mount process concern is not only the rope intensity of hoist and mount itself, more be the structural strength problem of hoist and mount in-process energy storage container, because most energy storage container weight is very heavy, and mass distribution is inhomogeneous, including the rope has certain power to pretension to inside when the corner hoist and mount, very easily lead to the not enough emergence fracture of some structural support intensity in hoist and mount process, and the problem that local welding seam drops.
With the application of finite element simulation means, the method has intuitive guiding significance on the structure design, and can effectively improve the design improvement of weak points. But at present, the simulation method for hoisting the rope is less, and in addition, the simulation method commonly used in the industry is different from the actual simulation method, so that the simulation result is obviously different from the actual situation.
The existing hoisting simulation technology is directly fixed at hoisting points and then gives a gravity acceleration load to the whole body, and the method does not consider that the mass distribution of the product is not uniform and the stress of each hoisting point is different; the situations of product inclination and the like in the actual hoisting process are not considered; and thirdly, the tensile force in the vertical direction and the inward pretightening force of the rope on the product structure at the joint are directly ignored, and the force has obvious influence on the structural strength of the product.
Disclosure of Invention
The invention aims to provide a simulation method of an energy storage container hoisting rope closer to an actual hoisting working condition and related equipment.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to one aspect of the invention, a simulation method for hoisting ropes of an energy storage container is provided, which comprises the following steps:
step 100, model pretreatment: establishing an energy storage container model; building rope models according to the actual rope installation angle and length, wherein one end of each rope model is infinitely close to but not in common with a node, and the other end of each rope model is connected with a hoisting point on the energy storage container model;
step 200, rope tension analysis: applying a first boundary condition, wherein the first boundary condition is used for restricting the degree of freedom of the connecting end of each rope model and the energy storage container; applying displacements along the length direction of each rope respectively to make calculation converge; performing rope tension analysis;
step 300, hoisting analysis: removing the first boundary condition, and applying a second boundary condition, wherein the second boundary condition is used for restricting the freedom degree of each rope model not connected with the end of the energy storage container; giving gravity acceleration to the integral model; and (6) carrying out hoisting analysis.
In an embodiment, said rope model of the method is established using a TRUSS unit.
In an embodiment, in the step 100 of the method, the establishing the energy storage container model includes:
111, performing geometric processing and grid division on a three-dimensional model of the energy storage container;
step 112, establishing connection of all parts of the three-dimensional model;
and 113, setting material parameters and selecting unit types, and endowing corresponding parts.
In an embodiment, in the step 100 of the method, the building a rope model according to the actual rope installation angle and the actual rope installation length includes:
step 121, building a rope model for each rope by adopting a TRUSS unit according to the actual rope installation angle and length;
step 122, connecting lifting points on the energy storage container model by using rigid units, and then enabling the rigid units to share a node with one end of a corresponding rope model;
and 123, endowing the rope model with mechanical material properties and a sectional area.
In one embodiment, the step 100 of the method further comprises: and respectively establishing a local coordinate system for each rope model, wherein one axis of the local coordinate system of each rope model is consistent with the length direction of the corresponding rope model.
In an embodiment, in said step 200 of the method, a displacement of 0.001mm is applied along the length of each cord.
In one embodiment, in said step 200 of the method, the displacement is applied along the length of the rope a plurality of times to converge the calculation, each time the displacement is reduced while ensuring convergence.
In one embodiment, the method comprises the step 300 of imparting an applied gravitational acceleration of 1.2g or 1.5g to the global model.
According to another aspect of the present invention, a readable storage medium is provided, on which a computer program is stored, which when executed, implements the method for simulating an energy storage container hoisting rope according to any of the above embodiments.
According to yet another aspect of the present invention, there is also provided an apparatus comprising a memory and a processor;
the memory for storing a computer program;
the processor is configured to, when executing the computer program, implement the simulation method for hoisting ropes of the energy storage container according to any of the embodiments.
The embodiment of the invention has the beneficial effects that: by establishing a rope model according to the actual installation angle and length of the rope, the working conditions of uneven product quality distribution, product inclination and the like can be simulated, and the inward pretightening force of the rope can be simulated, so that the simulation analysis result is more accurate; in addition, the convergence problem is solved by using a displacement applied along the length of the rope.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
FIG. 1 is a schematic flow chart of an embodiment of the method of the present application;
fig. 2 is a block diagram of an embodiment of the apparatus of the present application.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
As shown in fig. 1, an embodiment of the present application provides a simulation method for hoisting ropes of an energy storage container, including the following steps:
step 100, model pretreatment: establishing an energy storage container model; building rope models according to the actual rope installation angle and length, wherein one end of each rope model is infinitely close to but not in common with a node, and the other end of each rope model is connected with a hoisting point on the energy storage container model;
compared with the method that the hoisting point is directly fixed and then the whole gravity acceleration load is given in the existing hoisting simulation technology, the method can simulate the working conditions of uneven mass distribution of the energy storage container, product inclination in the hoisting process and the like and can also simulate the inward pretightening force of the rope on the energy storage container because the rope model is established according to the actual rope installation angle and length, so that the method is more suitable for the actual hoisting process and has more accurate simulation result.
The rope model is built by a TRUSS unit (TRUSS element) in finite element software Abaqus, and the TRUSS unit can only calculate the stress in the length direction but cannot calculate the bending moment. It should be noted that the method is performed based on Abaqus, but the method may also be implemented by using units with similar attributes in other simulation software.
Specifically, the building of the energy storage container model in step 100 includes:
111, performing geometric processing and grid division on a three-dimensional model of the energy storage container;
step 112, establishing connection of all parts of the three-dimensional model, wherein the connection mode comprises welding, binding and friction contact;
and 113, setting material parameters and selecting unit types, and endowing corresponding parts.
Step 121, determining the length and the hoisting angle of each rope according to a hoisting drawing, and establishing a rope model for each rope by using a TRUSS unit;
step 122, connecting the hoisting points of the energy storage container models by using rigid units (such as RBE3), and then sharing nodes with one ends of corresponding rope models, wherein the ends of all the rope models, which are connected with the hoisting points, are infinitely close to but do not share nodes;
and 123, endowing the rope with mechanical material properties and a sectional area.
Furthermore, in order to facilitate the application of the displacement, in a possible embodiment, step 100 further comprises: and respectively establishing a local coordinate system for each rope model, wherein one axis of the local coordinate system of each rope model is consistent with the length direction of the corresponding rope model.
Step 200, rope tension analysis: applying a first boundary condition, wherein the first boundary condition is used for restricting the freedom degree of each rope model and the connection end of the hoisting point; applying a displacement value along the length of the rope to converge the calculation; performing rope tension analysis;
because the TRUSS unit is characterized by being capable of withstanding tension only in the lengthwise direction, it can withstand tension only in the initial state and cannot provide rigidity in the bending shear direction, as in the actual rope. However, in the model, the rope is inclined at an angle, and if the gravity acceleration is suddenly applied, the calculation cannot be converged because the rope cannot bear the force in the non-length direction in the initial state, so that the rope needs to be pre-stressed (pulled) to a certain extent before the gravity acceleration load is applied.
Optionally, in step 200, the first of the applied displacements in the cord length direction has a displacement value of 0.001 mm. In a possible embodiment, the step of applying the displacement along the length direction of the rope to calculate the convergence can be repeated for a plurality of times, and the displacement value is reduced on the premise of ensuring the convergence in each repetition, so that the convergence is kept consistent with the actual working condition as far as possible on the premise of meeting the convergence. For example, after a first application of 0.001mm displacement, the calculation is submitted to confirm convergence, and after a second application of 0.0005mm displacement, the calculation is submitted again to confirm convergence.
Step 300, hoisting analysis: removing the first boundary condition (namely, enabling the first boundary condition not to be transmitted), and applying a second boundary condition, wherein the second boundary condition is used for restraining the freedom degree of each rope and the connecting end of the energy storage container; giving gravity acceleration to the integral model; and submitting calculation and carrying out lifting analysis.
In order to simulate hoisting analysis, acceleration load cannot be hoisted at a constant speed completely in the actual hoisting process, and certain acceleration exists at the moment of hoisting. In addition, some non-structural members of the product are ignored, but the non-structural members have certain weight, after the factors are comprehensively considered, in order to more accurately simulate hoisting, the gravity acceleration of 1.2 times or 1.5 times can be taken as a safety factor, and the actual gravity acceleration value needs to be determined according to the working condition.
In conclusion, the rope model is established according to the actual rope installation angle and the actual rope installation length, so that the consistency between the hoisting simulation analysis and the actual hoisting working condition can be ensured, and the simulation analysis result is more accurate; furthermore, the problem of calculating convergence using the TRUSS unit is solved by using a way of applying a displacement in the length direction of the rope. Compared with the method of applying prestress by the cooling method, the method of applying displacement is more consistent with the reality and is easy to adjust.
Correspondingly, the application also provides a computer storage medium, in which computer executable instructions are stored, and when the computer executable instructions are executed by a processor, the simulation method for hoisting ropes of the energy storage container, which is described above, of the embodiment of the application is implemented.
In addition, as shown in fig. 2, an apparatus 400, such as a computer, is provided in the embodiments of the present application. The device 400 comprises a memory 401 and a processor 402; when the processor executes the computer program, the simulation method for hoisting ropes of the energy storage container according to any one of the embodiments is implemented.
The memory 401 may be used to store software programs and modules of application software, such as program instructions/modules corresponding to the method in the embodiment of the present invention, and the processor 402 executes various functional applications and data processing by running the software programs and modules stored in the memory 401, so as to implement the method described above. The memory 401 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 401 may further include memory located remotely from the processor 402, which may be connected to a computer device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The processor 402 may include, but is not limited to, a processing device such as a Microprocessor (MCU) or a Programmable logic device (FPGA).
It should be noted that the device 400 may also include more or fewer components than shown in fig. 2, or have a different configuration than shown in fig. 2.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. A simulation method for hoisting ropes of an energy storage container is characterized by comprising the following steps:
step 100, model pretreatment: establishing an energy storage container model; building rope models according to the actual rope installation angle and the actual rope installation length, wherein one end of each rope model is infinitely close to but not sharing a node, and the other end of each rope model is connected with a hoisting point on the energy storage container model;
step 200, rope tension analysis: applying a first boundary condition, wherein the first boundary condition is used for restricting the degree of freedom of the connecting end of each rope model and the energy storage container; applying displacements along the length direction of each rope respectively to make calculation converge; performing rope tension analysis;
step 300, hoisting analysis: removing the first boundary condition, and applying a second boundary condition, wherein the second boundary condition is used for restricting the freedom degree of each rope model not connected with the end of the energy storage container; giving gravity acceleration to the integral model; and (6) carrying out hoisting analysis.
2. The simulation method of hoisting a rope by using an energy storage container as claimed in claim 1, wherein the rope model is built by using a TRUSS unit.
3. The simulation method for hoisting a rope by using an energy storage container as claimed in claim 1, wherein in the step 100, the establishing the model of the energy storage container comprises:
111, performing geometric processing and grid division on a three-dimensional model of the energy storage container;
step 112, establishing connection of all parts of the three-dimensional model;
and 113, setting material parameters and selecting unit types, and endowing corresponding parts.
4. The method for simulating hoisting rope of energy storage container as claimed in claim 2, wherein said step 100 of establishing a rope model according to actual rope installation angle and length comprises:
step 121, building a rope model for each rope by adopting a TRUSS unit according to the actual rope installation angle and length;
step 122, connecting lifting points on the energy storage container model by using rigid units, and then enabling the rigid units to share a node with one end of a corresponding rope model;
and 123, endowing the rope model with mechanical material properties and a sectional area.
5. The method for simulating hoisting ropes of energy storage container according to claim 4, wherein the step 100 further comprises: and respectively establishing a local coordinate system for each rope model, wherein one axis of the local coordinate system of each rope model is consistent with the length direction of the corresponding rope model.
6. Method for simulating hoisting of ropes for energy storage containers according to claim 1, characterized in that in step 200 a displacement of 0.001mm is applied along the length of each rope.
7. The method as claimed in claim 6, wherein in step 200, the displacement is applied along the length direction of the rope for a plurality of times to converge the calculation, and the displacement value is reduced at each time of repetition on the premise of ensuring convergence.
8. Method for simulating hoisting ropes of energy storage container according to claim 1, characterized in that in step 300, the applied gravitational acceleration given to the integral model is 1.2g or 1.5 g.
9. A readable storage medium, characterized by: the storage medium has stored thereon a computer program which, when executed, implements a method of simulating an energy storage container hoisting rope according to any one of claims 1 to 8.
10. An apparatus comprising a memory and a processor;
the memory for storing a computer program;
the processor, when executing the computer program, is configured to implement the method of simulating an energy storage container hoisting rope according to any one of claims 1 to 8.
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