CN116432504B - Floating ball array swing characteristic analysis method, system and storage medium - Google Patents
Floating ball array swing characteristic analysis method, system and storage medium Download PDFInfo
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Abstract
The application relates to a floating ball array swing characteristic analysis method, a system and a storage medium, and relates to the technical field of computer simulation. According to the method, a finite element model of the floating ball array is built according to structural parameters and load parameters of the floating ball array device, gravity acceleration of the finite element model of the floating ball array in different swinging directions when the finite element model of the floating ball array is in different working conditions is calculated respectively, and finally stress cloud charts of the finite element model of the floating ball array in different working conditions are generated according to the gravity acceleration respectively, and whether the floating ball array device meets standards is judged according to the stress cloud charts. According to the method provided by the application, whether the design of the floating ball array device is reasonable is judged according to the stress condition of the finite element model of the monitoring floating ball array in different working conditions, and whether the swing of the ship has influence on the floating ball array device in the water quality treatment module is determined, and meanwhile, a good reference value is provided for the structural parameter setting of the floating ball array device in manufacturing and the like, so that the quality of a water source on the ship is ensured.
Description
Technical Field
The application relates to the technical field of computer simulation, in particular to a floating ball array swing characteristic analysis method, a system and a storage medium.
Background
The swing amplitude of the ship can be changed along with different conditions of the navigation water area, the swing amplitude of the ship can be changed correspondingly under severe water area conditions, and when the swing amplitude of the ship is increased along with the change of the water area conditions, the stability of the ship is greatly reduced.
In the related art, in order to ensure safe running of a ship, shaking of the ship under different environments is studied in depth to explain, pre-control or control the motion state of the ship under actual sea conditions, so that the occurrence of a ship overturning accident is avoided, and the influence of shaking on normal operation on the ship is reduced as much as possible.
However, as a complex system, a ship comprises a large number of complex components and devices, such as a ship sealed cabin, a ship power plant, etc., wherein the water treatment module is one of important devices on the ship, and the shaking of the ship may have a great influence on the performance of the water treatment module, however, no research on the water treatment module is conducted at present aiming at researching the shaking of the ship.
Disclosure of Invention
The embodiment of the application provides a floating ball array swing characteristic analysis method, a floating ball array swing characteristic analysis system and a storage medium, which are used for solving the problem that the manufacturing of a water quality treatment module lacks referential performance because whether the swing of a ship has influence on the water quality treatment module is uncertain in the related technology.
The application provides a method for analyzing the swing characteristics of a floating ball array, which comprises the following steps:
acquiring structural parameters and load parameters of a floating ball array device, and establishing a floating ball array three-dimensional model according to the structural parameters and the load parameters, wherein the floating ball array three-dimensional model comprises a floating ball array finite element model and a water tank finite element model;
respectively calculating the gravity acceleration of the floating ball array finite element model along different swinging directions when the floating ball array finite element model is in different working conditions;
and respectively generating stress cloud patterns of the floating ball array finite element model under different working conditions according to the gravity acceleration, and judging whether the floating ball array device meets the standard according to the stress cloud patterns.
In some embodiments, the step of calculating the gravity acceleration of the floating ball array finite element model along different swinging directions when the floating ball array finite element model is under different working conditions includes:
respectively calculating the gravity acceleration of the three-dimensional model of the floating ball array along the length direction and the height direction of the floating ball array device when the three-dimensional model of the floating ball array is in a rolling working condition, and generating a rolling load curve graph;
and respectively calculating the gravity acceleration of the three-dimensional model of the floating ball array along the length direction and the width direction of the floating ball array device when the three-dimensional model of the floating ball array is in a pitching working condition, and generating a pitching load curve graph.
In some embodiments, respectively calculating the gravity acceleration of the three-dimensional model of the floating ball array along the corresponding direction when the three-dimensional model of the floating ball array is in at least two different rolling and pitching swinging periods, and generating at least two rolling load graphs and at least two pitching load graphs according to the gravity acceleration.
In some embodiments, the step of generating stress cloud patterns of the finite element model of the floating ball array under different working conditions according to the gravitational acceleration respectively, and judging whether the floating ball array device meets the standard according to the stress cloud patterns includes:
generating a floating ball rolling stress cloud picture according to the rolling load curve graph, and generating a floating ball pitching stress cloud picture according to the pitching load curve graph;
and respectively judging whether the maximum stress values of the floating ball rolling stress cloud picture and the floating ball pitching stress cloud picture are smaller than a preset stress value, if so, judging that the floating ball array device meets the standard, and if not, not meeting the standard.
In some embodiments, before judging whether the floating ball array device meets the standard according to the stress cloud chart, the steps further include:
and judging whether the stress difference value born by any adjacent floating ball in the stress cloud chart is larger than a first preset difference value, if so, re-dividing the grid of the floating ball array finite element model, and correcting the discrete form of the load parameter until the stress difference value born by any adjacent floating ball in the stress cloud chart is not larger than the first preset difference value.
In some embodiments, before judging whether the floating ball array device meets the standard according to the stress cloud chart, the steps further include:
calculating a static stress value of the finite element model of the water tank when the finite element model is in a static working condition;
judging whether the difference value between the static stress value and the theoretical static stress value is smaller than a second preset difference value, if not, repartitioning the grid of the floating ball array finite element model, and correcting the discrete form of the load parameter until the difference value between the static stress value and the theoretical static stress value is smaller than the second preset difference value.
In some embodiments, after the finite element model of the floating ball array is established, simplifying the finite element model of the floating ball array, where the step of simplifying includes:
performing equal proportion reduction on the floating ball array finite element model;
combining a plurality of floating balls positioned in the middle into a whole;
and deleting the chamfer and the round angle which are not larger than the preset size.
In some embodiments, simplifying the floating ball array finite element model by UG modeling software;
and respectively calculating the gravity accelerations of the finite element model of the floating ball array along different swinging directions when the finite element model of the floating ball array is in different working conditions by using ANSYS simulation software, and respectively generating stress cloud patterns of the finite element model of the floating ball array under different working conditions by using the ANSYS simulation software according to the gravity accelerations so as to judge whether the floating ball array device meets the standard.
In a second aspect, the present application provides a floating ball array rocking characteristic analysis system for implementing any one of the above-mentioned floating ball array rocking characteristic analysis methods, which includes:
the information acquisition module is used for acquiring structural parameters and load parameters of the floating ball array device and establishing a floating ball array three-dimensional model according to the structural parameters and the load parameters, wherein the floating ball array three-dimensional model comprises a floating ball array finite element model and a water tank finite element model;
the calculation module is used for calculating the gravity acceleration along different swinging directions when the floating ball array finite element model is in different working conditions respectively;
and the evaluation judging module is used for respectively generating stress cloud pictures of the floating ball array finite element model under different working conditions according to the gravity acceleration and judging whether the floating ball array device meets the standard according to the stress cloud pictures.
In a third aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the above-described floating ball array rocking characteristic analysis methods.
The technical scheme provided by the application has the beneficial effects that:
the embodiment of the application provides a floating ball array swinging characteristic analysis method, which is characterized in that a floating ball array finite element model is built according to structural parameters and load parameters of a floating ball array device, gravity acceleration of the floating ball array finite element model in different swinging directions is calculated respectively when the floating ball array finite element model is in different working conditions, and then stress cloud patterns of the floating ball array finite element model in different working conditions are generated respectively according to the gravity acceleration, so that whether the floating ball array device meets the standard or not is judged according to the stress cloud patterns.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a floating ball structure of a method for analyzing the swing characteristics of a floating ball array according to an embodiment of the present application;
fig. 2 is a graph of rolling load when the rolling period of the method for analyzing the rolling characteristics of the floating ball array according to the embodiment of the present application is 3S;
fig. 3 is a graph of rolling load when the rolling period of the method for analyzing the rolling characteristics of the floating ball array according to the embodiment of the present application is 14S;
FIG. 4 is a graph of pitch load for a 4S period of the method for analyzing the rolling characteristics of a floating ball array according to an embodiment of the present application;
fig. 5 is a graph of pitch load when the swing period of the method for analyzing the swing characteristics of the floating ball array according to the embodiment of the present application is 10S.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a floating ball array swing characteristic analysis method, which can solve the problem that the manufacturing of a water quality treatment module lacks references because whether the swing of a ship has influence on the water quality treatment module is uncertain in the related technology.
Referring to fig. 1, the method for analyzing the swing characteristics of the floating ball array firstly obtains structural parameters and load parameters of the floating ball array device, the floating ball array device mainly comprises a water tank and floating balls positioned in the water tank, the structural parameters mainly comprise geometric configurations among the floating balls, the connection relation between the floating balls and the water tank, the material and material mechanical characteristics of the floating balls and the water tank, the material mechanical characteristics specifically comprise aspects such as yield strength, ultimate strength, elastic modulus, poisson ratio, density and thermal expansion coefficient, and the like, a three-dimensional model of the floating ball array can be built according to the structural parameters and the load parameters, the three-dimensional model of the floating ball array specifically comprises a finite element model of the floating ball array and a finite element model of the water tank, gravity accelerations of the finite element model of the floating ball array in different swing directions are calculated respectively, stress cloud charts of the finite element model of the floating ball array in different working conditions are generated respectively according to the gravity accelerations, and finally whether the floating ball array device meets the standard or not is judged according to the stress cloud charts. According to the method for analyzing the swing characteristics of the floating ball array, whether the design of the floating ball array device is reasonable or not is judged according to the stress conditions of the finite element model of the monitoring floating ball array under different working conditions, whether the swing of a ship has influence on the floating ball array device in the water quality treatment module or not is determined, meanwhile, a good reference value is provided for the structural parameter setting of the floating ball array device during manufacturing and the like, and the quality of a water source on the ship is guaranteed.
Further, during the running process of the ship, the main swing is mainly divided into a roll along the transverse direction and a pitch along the longitudinal direction, so that the gravity acceleration along different swing directions when the floating ball array finite element model is under different working conditions is calculated respectively, and the steps specifically comprise: and respectively calculating the gravitational acceleration along the length direction and the height direction of the floating ball array device when the floating ball array three-dimensional model is in a rolling working condition, namely the gravitational acceleration along the Y direction and the Z direction at different moments, generating a rolling load curve graph, respectively calculating the gravitational acceleration along the length direction and the width direction of the floating ball array device when the floating ball array three-dimensional model is in a pitching working condition, namely the gravitational acceleration along the X direction and the Y direction at different moments, and generating a pitching load curve graph.
Further, the gravity acceleration of the floating ball array three-dimensional model in the corresponding direction when the floating ball array three-dimensional model is in at least two different rolling and pitching swinging periods is calculated respectively, and at least two rolling load curves and at least two pitching load curves are generated according to the gravity acceleration. Specifically, in order to ensure accuracy of a result, the three-dimensional model of the floating ball array undergoes at least two swinging periods during simulation, swinging working conditions are shown in the following table 1, two swinging periods are taken as an example, at this time, the longest period and the shortest period are selected for calculation respectively, the calculated time length is 2 times of the swinging period, a gravity acceleration component of a corresponding swinging angle is applied to the gravity center, and a rolling load curve graph and a pitching load curve graph under different swinging working conditions and different swinging periods are shown in fig. 2-5.
Further, stress cloud charts of the floating ball array finite element model under different working conditions are respectively generated according to the gravity acceleration, whether the floating ball array device meets the standard is judged according to the stress cloud charts, and the method specifically comprises the following steps: firstly, generating a floating ball rolling stress cloud picture according to a rolling load curve graph, generating a floating ball pitching stress cloud picture according to a pitching load curve graph, and finally, respectively judging whether the maximum stress values of the floating ball rolling stress cloud picture and the floating ball pitching stress cloud picture are smaller than a preset stress value, if so, judging that the floating ball array device meets the standard, and if not, judging that the floating ball array device does not meet the standard. The following table 2 shows the structural parameters of the floating ball array device, after simulation calculation, under the conditions of rolling working condition and 3s of swinging period, the maximum stress value is 25006Pa, and the position of the maximum stress value is located at the tip of the floating ball, namely the convex part, and is far smaller than the stress intensity of the material, so that the floating ball array device meets the allowable range of the material, and if the rolling working condition is qualified, the overall structural design is reasonable. In addition, the floating ball rolling displacement cloud picture can be generated according to the rolling load curve graph at the same time, the floating ball pitching displacement cloud picture is generated according to the pitching load curve graph, and the maximum deformation is 2.71 multiplied by 10 -4 mm, the maximum deformation is positioned in the middle row of the floating ball array body, the maximum stress value is far less than 0.2MPa, and the tiny permanent deformation accords with the allowable range of materials.
Further, before judging whether the floating ball array device meets the standard according to the stress cloud picture, the method specifically further comprises the following steps: and judging whether the stress difference value born by any adjacent floating ball in the stress cloud chart is larger than a first preset difference value, if so, re-dividing the grid of the floating ball array finite element model, and correcting the discrete form of the load parameter until the stress difference value born by any adjacent floating ball in the stress cloud chart is not larger than the first preset difference value. Specifically, cell selection and grid division are performed during modeling, a water tank is simulated by a SHELL cell SHELL281 unit, a floating ball is simulated by a solid cell, the grid division is performed in a free grid mode under the comprehensive actual working condition, the cell size is set to be 10mm, the number of model cells is 168338, the number of nodes is 279356, the average grid quality is 0.803, and the average grid quality is greater than 0.7, so that the calculation requirement is met; after the results such as rolling stress cloud pictures and pitching stress cloud pictures of the water tank and the floating ball and data are obtained through simulation software calculation, the calculation results are analyzed and processed before evaluation, if the requirements are met, the output results are specifically output, namely whether the rolling stress cloud pictures and pitching stress cloud pictures are continuous and undistorted, whether the stress difference value born by any adjacent floating ball in the corresponding stress cloud pictures is small enough or not is reflected in numerical values, if the stress difference value is not larger than a first preset difference value, the requirements are met, if the stress difference value is not larger than the first preset difference value, the grids of the finite element model of the floating ball array are reclassified, and the discrete form of the load parameters is corrected until the stress difference value born by any adjacent floating ball in the corresponding stress cloud pictures is not larger than the first preset difference value.
Further, before judging whether the floating ball array device meets the standard according to the stress cloud picture, the method further comprises the following steps: calculating a static stress value of the finite element model of the water tank under a static working condition, judging whether the difference value between the static stress value and a theoretical static stress value is smaller than a second preset difference value, if not, indicating that the difference value is larger than the theoretical difference value, and greatly affecting the final result accuracy, so that the grid of the finite element model of the floating ball array is required to be divided again, and the discrete form of the load parameter is required to be corrected until the difference value between the static stress value and the theoretical static stress value is smaller than the second preset difference value.
Further, after the finite element model of the floating ball array is established, the finite element model of the floating ball array is simplified, the step of simplifying the finite element model of the floating ball array specifically comprises the steps of carrying out equal proportion reduction on the finite element model of the floating ball array, and as the stress states of the floating balls at the relative positions are the same, the floating balls can be reduced according to the proportion, the stress states of the floating balls are kept unchanged, the number of the floating balls is correspondingly reduced, and the reduction of the number is beneficial to more efficient simulation calculation of a computer; the application aims to study the stress and deformation of the floating ball and the water tank caused by the impact of the floating ball on the four walls of the water tank in the swinging process, so that the middle floating balls are taken as a whole, and the simulation can be directly replaced by a cuboid; the chamfering and filleting machine also comprises a chamfering and filleting machine which are not more than a preset size, and when the structural sizes of the chamfering, filleting machine and the like are very small, the chamfering and filleting machine can directly ignore the chamfering and filleting machine.
Further, simplifying the finite element model of the floating ball array by using UG modeling software; and respectively calculating the gravity accelerations of the finite element model of the floating ball array along different swinging directions when the finite element model of the floating ball array is under different working conditions by using ANSYS simulation software, and respectively generating stress cloud patterns of the finite element model of the floating ball array under different working conditions according to the gravity accelerations by using ANSYS simulation software so as to judge whether the floating ball array device meets the standard.
The application also provides a floating ball array swinging characteristic analysis system which is used for implementing the floating ball array swinging characteristic analysis method, and specifically comprises an information acquisition module, a calculation module and an evaluation and judgment module, wherein the information acquisition module is used for acquiring structural parameters and load parameters of a floating ball array device, establishing a floating ball array finite element model according to the structural parameters and the load parameters, the floating ball array three-dimensional model comprises the floating ball array finite element model and a water tank finite element model, the calculation module is used for respectively calculating the gravity acceleration of the floating ball array finite element model along different swinging directions when the floating ball array finite element model is under different working conditions, and the evaluation and judgment module is used for respectively generating stress cloud charts of the floating ball array finite element model under different working conditions according to the gravity acceleration and judging whether the floating ball array device meets the standard or not according to the stress cloud charts.
The function implementation of each module in the floating ball array swing characteristic analysis system corresponds to each step in the floating ball array swing characteristic analysis method, and the function and implementation process of each module are not described in detail herein.
The application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps of the above-mentioned method for analyzing the swing characteristics of the floating ball array.
The method implemented when the computer program is executed may refer to each step of the above-mentioned method for analyzing the swing characteristics of the floating ball array, which is not described herein again.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A method for analyzing the swing characteristics of a floating ball array is characterized by comprising the following steps:
acquiring structural parameters and load parameters of a floating ball array device, and establishing a floating ball array three-dimensional model according to the structural parameters and the load parameters, wherein the floating ball array three-dimensional model comprises a floating ball array finite element model and a water tank finite element model;
respectively calculating the gravity acceleration of the three-dimensional model of the floating ball array along the length direction and the height direction of the floating ball array device when the three-dimensional model of the floating ball array is in a rolling working condition, and generating a rolling load curve graph;
respectively calculating the gravity acceleration of the three-dimensional model of the floating ball array along the length direction and the width direction of the floating ball array device when the three-dimensional model of the floating ball array is in a pitching working condition, and generating a pitching load curve graph;
respectively calculating the gravity acceleration of the floating ball array three-dimensional model along the corresponding direction when the floating ball array three-dimensional model is in at least two different rolling and pitching swinging periods, and generating at least two rolling load curves and a pitching load curve according to the gravity acceleration;
generating a floating ball rolling stress cloud picture according to the rolling load curve graph, and generating a floating ball pitching stress cloud picture according to the pitching load curve graph;
and respectively judging whether the maximum stress values of the floating ball rolling stress cloud picture and the floating ball pitching stress cloud picture are smaller than a preset stress value, if so, judging that the floating ball array device meets the standard, and if not, not meeting the standard.
2. The method for analyzing the swing characteristics of the floating ball array according to claim 1, wherein before judging whether the floating ball array device meets the standard according to the stress cloud chart, the method further comprises the steps of:
and judging whether the stress difference value born by any adjacent floating ball in the stress cloud chart is larger than a first preset difference value, if so, re-dividing the grid of the floating ball array finite element model, and correcting the discrete form of the load parameter until the stress difference value born by any adjacent floating ball in the stress cloud chart is not larger than the first preset difference value.
3. The method for analyzing the swing characteristics of the floating ball array according to claim 1, wherein before judging whether the floating ball array device meets the standard according to the stress cloud chart, the method further comprises the steps of:
calculating a static stress value of the finite element model of the water tank when the finite element model is in a static working condition;
judging whether the difference value between the static stress value and the theoretical static stress value is smaller than a second preset difference value, if not, repartitioning the grid of the floating ball array finite element model, and correcting the discrete form of the load parameter until the difference value between the static stress value and the theoretical static stress value is smaller than the second preset difference value.
4. The method for analyzing the swing characteristics of a floating ball array according to claim 1, wherein after the finite element model of the floating ball array is built, the finite element model of the floating ball array is subjected to a simplification process, and the step of simplifying the simplification process includes:
performing equal proportion reduction on the floating ball array finite element model;
combining a plurality of floating balls positioned in the middle into a whole;
and deleting the chamfer and the round angle which are not larger than the preset size.
5. The method for analyzing the swing characteristics of the floating ball array according to claim 4, wherein:
simplifying the floating ball array finite element model by using UG modeling software;
and respectively calculating the gravity accelerations of the finite element model of the floating ball array along different swinging directions when the finite element model of the floating ball array is in different working conditions by using ANSYS simulation software, and respectively generating stress cloud patterns of the finite element model of the floating ball array under different working conditions by using the ANSYS simulation software according to the gravity accelerations so as to judge whether the floating ball array device meets the standard.
6. A floating ball array rocking characteristic analysis system, which is used for implementing the floating ball array rocking characteristic analysis method according to any one of claims 1 to 5, and comprises:
the information acquisition module is used for acquiring structural parameters and load parameters of the floating ball array device and establishing a floating ball array three-dimensional model according to the structural parameters and the load parameters, wherein the floating ball array three-dimensional model comprises a floating ball array finite element model and a water tank finite element model;
the calculation module is used for calculating the gravity acceleration along different swinging directions when the floating ball array finite element model is in different working conditions respectively;
and the evaluation judging module is used for respectively generating stress cloud pictures of the floating ball array finite element model under different working conditions according to the gravity acceleration and judging whether the floating ball array device meets the standard according to the stress cloud pictures.
7. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method for analyzing the rolling characteristics of a floating ball array according to any one of claims 1 to 5.
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| CN202310550560.3A CN116432504B (en) | 2023-05-16 | 2023-05-16 | Floating ball array swing characteristic analysis method, system and storage medium |
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