Transportation process stability assessment method and device for movable processing device

Abstract

The invention relates to a transportation process stability assessment method and device for a movable processing device, and the method comprises the steps: constructing a three-dimensional model of the movable processing device; performing meshing segmentation on the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; pre-processing data corresponding to the three-dimensional model in the transportation process and acceleration factors in the transportation process are determined; obtaining a statics finite element result based on the acceleration factor, the pre-processing data and a finite element model; performing modal analysis on the three-dimensional model based on a statics finite element result to obtain the inherent frequency of the three-dimensional model; and road surface information parameters are determined, and the stability result of the movable processing device in the transportation process is determined based on the road surface information parameters, the inherent frequency, the pre-processing data and the three-dimensional model. According to the method, the technical effect that the stability result of the movable processing device is determined by constructing the finite element simulation model of the movable device, so that the stability judgment of the movable processing device is more accurate is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical simulation of stability performance, and in particular to a method and device for evaluating the stability of a transport process of a movable processing device. Background Art

[0002] A mobile treatment device is usually a device that integrates a complete set of equipment into a container and transports it through various means of transportation. Mobile treatment devices involve multiple modes of transportation, such as road, rail, ocean, and aviation. Its advantages are small footprint, flexible operation, and no regional restrictions. The treatment process can be adjusted at any time according to the treatment requirements, and the cost is lower. Therefore, mobile treatment devices are widely used in various fields year by year.

[0003] However, in the actual road transportation process, the mobile handling device may produce random excitation responses to the wheels of the transport vehicle due to the unevenness of the road surface due to the different road surfaces it travels on. After the wheels produce random responses, they may cause vibrations to the container loaded with the mobile handling device, thereby causing vibrations to the equipment in the device. In severe cases, the equipment may resonate with the excitation of the uneven road surface, causing damage to the equipment.

[0004] In the related art, researchers mostly consider the impact of vibration on the transport vehicle, and thus indirectly judge the stability of the mobile processing device, which leads to inaccurate stability judgment of the mobile processing device during transportation.

[0005] The above problems need to be solved urgently. Summary of the invention

[0006] The invention discloses a method and a device for evaluating the stability of a transport process of a movable processing device, aiming to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solutions:

[0008] On the one hand, the present invention provides a method for evaluating the stability of a movable processing device during transportation, which includes: constructing a three-dimensional model of the movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; meshing the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; determining pre-processing data corresponding to the three-dimensional model during transportation, and an acceleration factor during transportation; obtaining static finite element results based on the acceleration factor, the pre-processing data and the finite element model; performing modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model; determining road surface information parameters, and determining the stability results of the movable processing device during transportation based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

[0009] Optionally, constructing a three-dimensional model of the movable processing device includes: acquiring a key structure of the movable processing device, wherein the key structure is a component that may be affected by impact during transportation of the movable processing device; based on the key structure, determining features corresponding to the key structure, wherein the features corresponding to the key structure include at least points, lines, and surfaces existing in the key structure; based on the features corresponding to the key structure, determining a size of the key structure; and based on the size of the key structure, constructing a three-dimensional model of the movable processing device.

[0010] Optionally, determining the pre-processing data corresponding to the three-dimensional model during the transportation process includes: determining the physical parameters of the three-dimensional model, wherein the physical parameters include at least: material density, Poisson's ratio and / or elastic modulus of the movable processing device; determining the transportation and fixing method of the three-dimensional model, wherein the transportation and fixing method includes at least: bottom fixing of the movable processing device, middle fixing of the movable processing device and / or top fixing of the movable processing device; determining the contact type of the transportation and fixing method, wherein the contact type includes at least: binding contact, non-separation contact, rough contact, frictionless contact and / or friction contact; based on the physical parameters, the transportation and fixing method and the contact type, determine the pre-processing data corresponding to the three-dimensional model during the transportation process.

[0011] Optionally, based on the acceleration factor, the pre-processing data and the finite element model, static finite element results are obtained, including: based on the acceleration factor and the pre-processing data, constraints are imposed on the finite element model to obtain a constrained finite element model; based on the constrained finite element model, a rigid matrix is ​​constructed; based on the rigid matrix, the static finite element results are determined.

[0012] Optionally, based on the static finite element results, a modal analysis is performed on the three-dimensional model to obtain the natural frequency of the three-dimensional model, including: constructing a dynamic expression for the modal analysis; determining a node displacement vector; and when the external excitation is 0, solving the dynamic expression based on the node displacement vector to determine the natural frequency.

[0013] Optionally, the determining of the pavement information parameters is based on the pavement information parameters, the pavement information parameters, the natural frequency, the pre-processing data and the three-dimensional model, including: determining the pavement roughness power spectrum density based on the pavement information parameters, wherein the pavement roughness power spectrum density includes the pavement roughness spatial power spectrum density and the pavement roughness temporal power spectrum density; determining the vibration condition of the three-dimensional model based on the pavement information parameters, the natural frequency, the pre-processing data and the three-dimensional model; obtaining the stability result of the transportation process of the movable processing device based on the pavement roughness power spectrum density and the vibration condition.

[0014] Optionally, when there are multiple road surface information parameters, determining the road surface roughness spatial power spectrum density includes: calculating the road surface roughness spatial power spectrum density as follows:

[0015]

[0016] Where n is the spatial frequency corresponding to any road information parameter among the multiple road information parameters; n0 is the reference spatial frequency; G q (n0) is the power spectral density corresponding to the reference spatial frequency, G q (n) is the spatial power spectrum density of road roughness; W is the exponent of vibration frequency.

[0017] Optionally, determining the road surface roughness time power spectrum density includes: the road surface roughness time power spectrum density is calculated as follows:

[0018]

[0019] Among them, G q (f) is the time power spectrum density of road roughness, G q (n) is the spatial power spectrum density of road roughness, f is the time frequency, and u is the transportation speed of the three-dimensional model during transportation.

[0020] According to another aspect of an embodiment of the present invention, there is also provided a device for evaluating the stability of a transport process of a movable processing device, comprising: a modeling module for constructing a three-dimensional model of the movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; a finite element module for meshing the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; a data determination module for determining pre-processing data corresponding to the three-dimensional model during the transport process, and an acceleration factor during the transport process; a statics module for determining the acceleration factor required during the transport process, and obtaining a statics finite element result based on the acceleration factor and the finite element model; a natural frequency module for performing modal analysis on the three-dimensional model based on the statics finite element result to obtain the natural frequency of the three-dimensional model; and a vibration characteristic module for determining road surface information parameters, and determining the stability result of the transport process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

[0021] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, wherein the non-volatile storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executed by any one of the methods for assessing the stability of a transport process of a movable processing device.

[0022] According to another aspect of an embodiment of the present invention, there is further provided a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any one of the methods for assessing stability during transportation of a movable processing device are implemented.

[0023] The technical solution adopted by the present invention can achieve at least one of the following beneficial effects:

[0024] In an embodiment of the present invention, a three-dimensional model of a movable processing device is constructed, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; the three-dimensional model is meshed to obtain a finite element model corresponding to the three-dimensional model; pre-processing data corresponding to the three-dimensional model during the transportation process and an acceleration factor during the transportation process are determined; static finite element results are obtained based on the acceleration factor, the pre-processing data and the finite element model; based on the static finite element results, a modal analysis is performed on the three-dimensional model to obtain the natural frequency of the three-dimensional model; road surface information parameters are determined, and based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model, the stability result of the transport process of the movable processing device is determined. The purpose of constructing a three-dimensional model of the movable processing device and a finite element simulation model to directly determine the stability result of the movable processing device is achieved, thereby achieving the technical effect of making the stability judgment of the movable processing device more accurate by directly analyzing the stability result of the movable processing device, thereby solving the technical problem of inaccurate stability judgment of the movable processing device during transportation due to the fact that the relevant technology adopts the method of indirectly judging the stability of the movable processing device by taking into account the influence of vibration of the transport vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0026] Figure 1 is a flow chart of a method for evaluating the stability of a transport process of a movable processing device in Embodiment 1 of the present invention;

[0027] Figure 2 It is a structural diagram of a combustion furnace of a method for evaluating the stability of a transport process of a movable processing device in Example 1 of the present invention;

[0028] Figure 3 is a static analysis displacement diagram of a method for evaluating stability during transportation of a movable processing device in Example 1 of the present invention;

[0029] Figure 4 It is a random vibration analysis combustion furnace diagram of a method for evaluating the stability of a transport process of a mobile processing device in Example 1 of the present invention;

[0030] Figure 5 is a displacement response curve diagram of a method for evaluating stability during transportation of a movable processing device in Example 1 of the present invention;

[0031] Figure 6 is a flow chart of an optional method for evaluating the stability of a transport process of a movable processing device in Embodiment 2 of the present invention;

[0032] Figure 7 It is a schematic structural diagram of a transport process stability assessment device for a movable processing device in Example 3 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.

[0035] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention are explained below:

[0037] Mobile processing devices refer to those that can be easily moved and deployed to adapt to different working environments and needs. These devices are usually compact, easy to operate, easy to transport and install, and can be put into use quickly in a short time.

[0038] In order to solve the problems existing in the prior art, the embodiments of the present application provide a method and device for evaluating the stability of a transport process of a movable processing device.

[0039] Example 1

[0040] This embodiment provides a method for evaluating the stability of a transport process of a mobile processing device. Figure 1 As shown, Figure 1 : is a flow chart of a method for evaluating the stability of a transport process of a movable processing device in Embodiment 1 of the present invention, the method comprising:

[0041] Step S102, constructing a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate an integral device that is fixed on a transport vehicle and can be transported and moved;

[0042] In some preferred embodiments, constructing a three-dimensional model of a movable processing device includes: obtaining a key structure of the movable processing device, wherein the key structure is a component that may be affected by impact during transportation of the movable processing device; based on the key structure, determining features corresponding to the key structure, wherein the features corresponding to the key structure include at least points, lines, and surfaces existing in the key structure; based on the features corresponding to the key structure, determining the size of the key structure; and based on the size of the key structure, constructing a three-dimensional model of the movable processing device.

[0043] Optionally, a combustion device for mobile radioactive waste treatment includes a combustion furnace. Since the refractory bricks inside the combustion furnace are stacked and easily damaged by impact, the combustion furnace is selected as the key structure of the mobile treatment device. Figure 2 As shown, Figure 2 It is a structural diagram of a combustion furnace of a method for evaluating the stability of a transport process of a movable processing device in Example 1 of the present invention.

[0044] Optionally, based on the features existing in the combustion furnace, wherein the features at least include the bottom support frame, refractory bricks, shell and some fastening bolts of the combustion furnace model (three-dimensional model); based on the above-determined features of the combustion furnace, the size structure of the combustion furnace is determined, and a three-dimensional model of the combustion furnace is established. In the specific three-dimensional model, the bottom support frame and the shell are connected by fastening bolts. In order to improve the subsequent calculation efficiency, some chamfers in the three-dimensional model can be removed.

[0045] Step S104, meshing and segmenting the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model;

[0046] Optionally, the three-dimensional model is imported into the simulation software, wherein the engineering simulation software may be ANSYS Workbench software. Based on the three-dimensional model imported into the ANSYS Workbench software, a physical structure to be analyzed, i.e., a refractory brick structure of the combustion furnace, is created. According to the actual material of the combustion furnace set, and the corresponding material properties (elastic modulus, Poisson's ratio, density) are set, the three-dimensional model is meshed based on the meshing tool in the ANSYS Workbench software to obtain a finite element simulation model. The density and type of the mesh should be determined according to the analysis requirements and the availability of computing resources.

[0047] Step S106, determining the pre-processing data corresponding to the three-dimensional model during the transportation process, and the acceleration factor during the transportation process;

[0048] In some preferred embodiments, determining the pre-processing data corresponding to the three-dimensional model during the transportation process includes: determining the physical parameters of the three-dimensional model, wherein the physical parameters include at least: the material density, Poisson's ratio and / or elastic modulus of the movable processing device; determining the transportation fixing method of the three-dimensional model, wherein the transportation fixing method includes at least: bottom fixing of the movable processing device, middle fixing of the movable processing device and / or top fixing of the movable processing device; determining the contact type of the transportation fixing method, wherein the contact type includes at least: binding contact, non-separation contact, rough contact, frictionless contact and / or friction contact; based on the physical parameters, the transportation fixing method and the contact type, determining the pre-processing data corresponding to the three-dimensional model during the transportation process.

[0049] Optionally, the established three-dimensional model (or finite element model) of the combustion furnace is imported into the static analysis module (Static Structural module) of the engineering simulation software, and static analysis is performed in the engineering simulation software. Based on the actual road transportation conditions and the three-dimensional model, physical parameters, transportation fixing methods, contact types, accelerations, etc. are set, and finite element model calculations are performed under static analysis.

[0050] Specifically, based on actual road transportation conditions and three-dimensional models, the set physical parameters may include: density, Poisson's ratio and elastic modulus of the steel material of the combustion furnace shell, and density, Poisson's ratio and elastic modulus of the internal refractory bricks. Through the above physical parameters, the material of the combustion furnace during actual transportation and the degree of damage that may occur when impacted can be well determined. Based on actual transportation conditions, the contact type is selected as binding contact, that is, the combustion furnace is bound to the transportation vehicle to prevent the combustion furnace from falling during transportation. Based on actual transportation conditions, the bottom support frame of the combustion furnace is constrained, that is, the bottom support frame is bundled, so that the combustion furnace is fixed on the transportation vehicle.

[0051] Alternatively, the basic assumption of static analysis is that the influence of inertia in the analysis is not considered, so the time-related content can be simplified or ignored, and the simplified equation of static analysis is obtained as follows:

[0052] [K]{x}={F}

[0053] Among them, [K] is the stiffness coefficient matrix of the combustion furnace; {x} is the displacement vector of the combustion furnace; {F} is the force vector of the combustion furnace. Static analysis can reflect the displacement of the entire equipment during the transportation of the refractory brick structure (key structure) in the combustion furnace, such as Figure 3 As shown, Figure 3 It is a static analysis displacement diagram of a method for evaluating the stability of a transport process of a movable processing device in Example 1 of the present invention.

[0054] Optionally, the acceleration factor for road transport can be set based on the acceleration specified in the "Format and Content of Nuclear and Radiation Safety Analysis Report for Transport of Radioactive Materials (Draft for Comments)" (IAEA-SSG26 report), and shall not violate the transportation specifications. It should be noted that the acceleration factor is not limited to the content specified in the "Format and Content of Nuclear and Radiation Safety Analysis Report for Transport of Radioactive Materials (Draft for Comments)" (IAEA-SSG26 report), and can also be adjusted according to actual conditions, but shall not violate the transportation specifications.

[0055] Step S108, obtaining static finite element results based on the acceleration factor, pre-processing data and finite element model;

[0056] In some preferred embodiments, static finite element results are obtained based on acceleration factors, pre-processing data and finite element models, including: imposing constraints on the finite element model based on the acceleration factors and pre-processing data to obtain a constrained finite element model; constructing a rigid matrix based on the constrained finite element model; and determining the static finite element results based on the rigid matrix.

[0057] Optionally, an acceleration load (determined by an acceleration factor) is applied to the finite element model and solved to obtain static finite element results.

[0058] Specifically, in ANSYS Workbench software, the set acceleration factor is applied to the finite element model as an acceleration load, which can be achieved by setting the acceleration value in "Acceleration Load". In addition to applying the acceleration load, the corresponding boundary conditions (physical parameters, transportation fixing method, contact type) will be set according to the actual situation to ensure the accuracy and reliability of the analysis.

[0059] Based on the acceleration load and pre-processed data, the solution is performed in the solver of ANSYS Workbench software. The solution process depends on the complexity of the model and the availability of computing resources. Using the post-processing tools of ANSYS Workbench software, the results of static finite element analysis can be viewed, where the static finite element results include deformation, stress distribution, etc.

[0060] Step S110, based on the static finite element results, performing modal analysis on the three-dimensional model to obtain the natural frequency of the three-dimensional model;

[0061] In some preferred embodiments, based on the static finite element results, a modal analysis is performed on the three-dimensional model to obtain the natural frequency of the three-dimensional model, including: constructing a dynamic expression for the modal analysis; determining the node displacement vector; and solving the dynamic expression based on the node displacement vector to determine the natural frequency when the external excitation is 0.

[0062] Optionally, the static finite element results are imported into the modal analysis module (Modal module) of ANSYS Workbench software to obtain the natural frequency of the combustion furnace, such as Figure 4 As shown, Figure 4 This is a random vibration analysis combustion furnace diagram of a method for evaluating the stability of a transport process of a movable processing device in Example 1 of the present invention.

[0063] Specifically, the static finite element results are imported into the Modal module, and pre-processing data such as physical parameters, transportation and fixing methods, and contact types are added to obtain the structural vibration characteristics. The structural vibration characteristics are analyzed in the modal analysis module, and the natural frequency and vibration mode of the combustion furnace are calculated to provide the prerequisite for the subsequent random vibration analysis.

[0064] Optionally, the result of modal analysis is not an exact solution, but it can reflect the trend of change. In the process of modal analysis, the basic assumption is that all structures (combustion furnaces) are linear, so the general expression of the dynamics for modal analysis is:

[0065]

[0066] Where [M] is the mass matrix, [C] is the damping matrix, [K] is the stiffness matrix, {u} is the node displacement vector, is the node velocity vector, is the nodal acceleration vector, and {F(t)} is the nodal load vector that varies with time.

[0067] When the external excitation is 0, {F(t)}=0, and when the damping is ignored, then:

[0068]

[0069] The node displacement vector {u} can be expressed as:

[0070]

[0071] Solve the above equation, substitute it into the equation with external excitation equal to 0 and ignore damping, and consider The arbitrariness of can be obtained:

[0072] ([K]-ω 2 [M]){α}={0}

[0073] If the system of equations has a solution, then there exists a characteristic equation as follows:

[0074] |[K]-ω 2 [M]|=0

[0075] Finally, we can find the root ω of the above formula i (i=1,2....,N), which is the i-th order self-vibration frequency of the structure; the corresponding eigenvector {α} i , which is the i-th vibration mode of the structure, which is the inherent form of the device.

[0076] Step S112, determining road surface information parameters, and determining the stability results of the transport process of the movable processing device based on the road surface information parameters, natural frequencies, pre-processing data and the three-dimensional model.

[0077] Optionally, select key points at different locations of the refractory bricks of the combustion furnace and analyze the locations in the key structure that are more prone to damage under the same speed and the same road conditions. Figure 5 The figure shows the PSD curve of the displacement response of the combustion furnace at different positions due to random vibration. It can be determined that the position most prone to damage occurs in the middle of the combustion furnace. Figure 5 It is a displacement response curve diagram of a method for evaluating the stability of a transport process of a movable processing device in Example 1 of the present invention.

[0078] In some preferred embodiments, road surface information parameters are determined based on the road surface information parameters, based on the road surface information parameters, natural frequencies, pre-processing data and a three-dimensional model, including: based on the road surface information parameters, determining the road surface roughness power spectrum density, wherein the road surface roughness power spectrum density includes the road surface roughness spatial power spectrum density and the road surface roughness temporal power spectrum density; based on the road surface information parameters, natural frequencies, pre-processing data and a three-dimensional model, determining the vibration condition of the three-dimensional model; based on the road surface roughness power spectrum density and the vibration condition, obtaining the stability result of the transportation process of the movable processing device.

[0079] Optionally, the modal analysis results (natural frequency) are imported into a random vibration analysis module (RandomVibration module), and different road surface information parameters are set to obtain the vibration conditions of key equipment in the mobile processing device under different road surface information parameters.

[0080] Among them, the road surface information is a random process, and the real road surface information cannot be represented by a certain function. Therefore, a random deviation in the vertical direction of the road surface can be established to represent this random process. The road surface roughness power spectrum density can be divided into the road surface roughness spatial power spectrum density and the road surface roughness temporal power spectrum density according to ISO / DIS 8608 and GB / T 7031 of "Vehicle Vibration Input Road Surface Roughness Representation Method".

[0081] In some preferred implementations, when there are multiple road surface information parameters, determining the road surface roughness spatial power spectrum density includes: calculating the road surface roughness spatial power spectrum density as follows:

[0082]

[0083] Where n is the spatial frequency corresponding to any road information parameter among the multiple road information parameters; n0 is the reference spatial frequency; G q (n0) is the power spectral density corresponding to the reference spatial frequency, G q (n) is the spatial power spectrum density of road roughness; W is the exponent of vibration frequency.

[0084] Optionally, according to the national standard GB / T 7031, the road surface roughness is divided into 8 levels: AH, corresponding to 8 levels of G q (n0) value. The specific values ​​are shown in Table 1.

[0085] Table 1 Road roughness coefficient and power spectrum density of different grades of road surfaces

[0086]

[0087] In some preferred embodiments, determining the time power spectrum density of road surface roughness includes: calculating the time power spectrum density of road surface roughness as follows:

[0088]

[0089] Among them, G q (f) is the time power spectrum density of road roughness, G q (n) is the spatial power spectrum density of road roughness, f is the temporal frequency, and u is the transportation speed of the three-dimensional model during transportation.

[0090] Through the above-mentioned steps S102 to S112, the purpose of constructing a three-dimensional model of the movable processing device and a finite element simulation model to directly determine the stability result of the movable processing device is achieved, thereby achieving the technical effect of making the stability judgment of the movable processing device more accurate by directly analyzing the stability result of the movable processing device, thereby solving the technical problem of inaccurate stability judgment of the movable processing device during transportation due to the fact that the related technology adopts the method of indirectly judging the stability of the movable processing device by taking into account the influence of vibration of the transport vehicle.

[0091] Example 2

[0092] Based on the above embodiments and optional embodiments, the present invention also proposes an optional implementation mode: Figure 6 is a flow chart of an optional method for evaluating the stability of a transport process of a movable processing device in Example 2 of the present invention, such as Figure 6 As shown, the method includes:

[0093] Step S1, establishing a three-dimensional model of key structures according to the characteristics of the mobile processing device;

[0094] Optionally, the key structure should be a structure in the overall movable processing device that is more easily damaged during movement. The analysis time should be reduced as much as possible during the process of establishing the three-dimensional model to increase the accuracy of the analysis results.

[0095] Step S2, importing the established three-dimensional model into the engineering simulation software (ANSYS Workbench), setting the transportation fixing mode, contact type, and physical parameters according to the actual situation, setting the acceleration factor during highway transportation according to the acceleration factor recommended in the relevant standards, and performing finite element simulation calculation in the ANSYS Workbench software to obtain static finite element results;

[0096] Optional physical parameters include: density, Poisson's ratio and elastic modulus of each material in the key structure; the contact mode should be consistent with the actual situation; regarding the setting of constraint conditions, the bottom should be completely fixed to simulate the scenario of being fixed in the container, and the other constraint conditions should be consistent with the actual key structure constraints; the acceleration factor should comply with the values ​​required by the relevant standards of the transportation process and should be based on the overall coordinates of the model.

[0097] Step S3, based on the static finite element results, modal analysis is performed on the key equipment to obtain the vibration frequencies of the device in the first six orders; wherein the vibration frequency has multiple orders, the first six orders of the multiple-order vibration frequency can characterize the vibration frequency of the key equipment, and the vibration frequencies in the subsequent orders can be ignored;

[0098] The obtained static finite element results can be directly imported into the modal analysis of ANSYS Workbench software to calculate the modal vibration results.

[0099] Step S4, vibration frequency, sets parameters of different road surface information, performs random vibration analysis on key equipment, selects different key position points, and reflects the stability performance of key structures during highway transportation.

[0100] Optionally, the road condition is set according to the random vibration analysis module in the ANSYS Workbench software, and different road roughness coefficients and power spectrum densities are set according to relevant standards, and then different locations are selected for random vibration analysis.

[0101] Through the above steps S1 to S4, multiple modules in the ANSYS Workbench software can be combined, and static analysis, modal analysis and random vibration analysis can be used to comprehensively reflect whether the key structures in the mobile processing device are stable during the transportation process. The analysis process reduces the complexity of multiple software processes and improves calculation efficiency.

[0102] Example 3

[0103] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above-mentioned method for evaluating the stability of a transport process of a movable processing device. Figure 7 is a schematic diagram of the structure of a transport process stability assessment device for a movable processing device in Example 3 of the present invention. Figure 7 As shown, the transport process stability assessment device of the movable processing device comprises: a modeling module 301, a finite element module 302, a data determination module 303, a statics module 304, a natural frequency module 305 and a vibration characteristic module 306, wherein:

[0104] A modeling module 301 is used to construct a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a transportable and movable whole device fixed on a transport vehicle;

[0105] The finite element module 302 is used to perform mesh segmentation on the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model;

[0106] The data determination module 303 is used to determine the pre-processing data corresponding to the three-dimensional model during the transportation process and the acceleration factor during the transportation process;

[0107] The statics module 304 is used to determine the acceleration factor required during the transportation process, and obtain the statics finite element results based on the acceleration factor and the finite element model;

[0108] The natural frequency module 305 is used to perform modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model;

[0109] The vibration characteristic module 306 is used to determine the road surface information parameters, and determine the stability result of the transportation process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

[0110] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0111] It should be noted that the above-mentioned modeling module 301, finite element module 302, data determination module 303, statics module 304, natural frequency module 305 and vibration characteristic module 306 correspond to steps S102 to S112 in the embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned embodiment. It should be noted that the above-mentioned modules can be run in a computer terminal as part of the device.

[0112] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

[0113] The above-mentioned transport process stability assessment device for a movable processing device may also include a processor and a memory. The above-mentioned modeling module 301, finite element module 302, data determination module 303, statics module 304, natural frequency module 305 and vibration characteristic module 306 are all stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to realize corresponding functions.

[0114] The processor includes a kernel, which retrieves the corresponding program module from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0115] According to an embodiment of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute any one of the above-mentioned methods for evaluating the stability of a transport process of a movable processing device.

[0116] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

[0117] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: construct a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a portable and movable overall device fixed on a transport vehicle; mesh the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; determine the pre-processing data corresponding to the three-dimensional model during the transportation process, and the acceleration factor during the transportation process; obtain static finite element results based on the acceleration factor, the pre-processing data and the finite element model; based on the static finite element results, perform modal analysis on the three-dimensional model to obtain the natural frequency of the three-dimensional model; determine road surface information parameters, and determine the stability results of the transportation process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

[0118] According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any one of the above-mentioned methods for evaluating the stability of a transport process of a movable processing device is executed.

[0119] According to an embodiment of the present application, an embodiment of a computer program product is also provided. Optionally, in this embodiment, the computer program product includes a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for evaluating the stability of a transport process of a mobile processing device.

[0120] Optionally, the above-mentioned computer program product, when executed on a data processing device, is suitable for executing an initialization program having the following method steps: constructing a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; meshing the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; determining pre-processing data corresponding to the three-dimensional model during the transportation process, and an acceleration factor during the transportation process; obtaining static finite element results based on the acceleration factor, the pre-processing data and the finite element model; performing modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model; determining road surface information parameters, and determining the stability results of the transportation process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

[0121] An embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the program: constructing a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; meshing the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; determining pre-processing data corresponding to the three-dimensional model during the transportation process, and an acceleration factor during the transportation process; obtaining static finite element results based on the acceleration factor, the pre-processing data, and the finite element model; performing modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model; determining road surface information parameters, and determining stability results of the transport process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data, and the three-dimensional model.

[0122] The above sequence of the embodiments of the present invention is for description only and does not represent the superiority or inferiority of the embodiments.

[0123] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0124] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0125] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0126] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0127] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a non-volatile storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0128] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for evaluating the stability of a transport process of a mobile processing device, characterized in that: include: Constructing a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; Performing mesh segmentation on the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; Determine the pre-processing data corresponding to the three-dimensional model during the transportation process, and the acceleration factor during the transportation process; Obtaining static finite element results based on the acceleration factor, the pre-processing data and the finite element model; Based on the static finite element results, modal analysis is performed on the three-dimensional model to obtain the natural frequency of the three-dimensional model; Determine road surface information parameters, and determine stability results of the transport process of the movable processing device based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model.

2. The method for evaluating the stability of a transport process of a mobile processing device according to claim 1, characterized in that: The constructing of the three-dimensional model of the movable processing device comprises: Acquire a key structure of a movable processing device, wherein the key structure is a component that may be affected by impact during transportation of the movable processing device; Based on the key structure, determining features corresponding to the key structure, wherein the features corresponding to the key structure at least include points, lines, and surfaces existing in the key structure; Determining the size of the key structure based on the features corresponding to the key structure; Based on the dimensions of the key structures, a three-dimensional model of the movable processing device is constructed.

3. The method for evaluating the stability of a transport process of a mobile processing device according to claim 1, characterized in that: The determining of the pre-processing data corresponding to the three-dimensional model during the transportation process includes: Determining physical parameters of the three-dimensional model, wherein the physical parameters include at least: material density, Poisson's ratio and / or elastic modulus of the movable processing device; Determining a transportation and fixing mode of the three-dimensional model, wherein the transportation and fixing mode at least includes: fixing the bottom of the movable processing device, fixing the middle of the movable processing device, and / or fixing the top of the movable processing device; Determining the contact type of the transport fixing mode, the contact type at least including: binding contact, non-separation contact, rough contact, frictionless contact and / or friction contact; Based on the physical parameters, the transportation and fixing method, and the contact type, pre-processing data corresponding to the three-dimensional model during the transportation process is determined.

4. The method for evaluating the stability of a transport process of a mobile processing device according to claim 1, characterized in that: Based on the acceleration factor, the pre-processing data and the finite element model, a static finite element result is obtained, including: Based on the acceleration factor and the pre-processing data, constraints are imposed on the finite element model to obtain a constrained finite element model; constructing a rigidity matrix based on the constrained finite element model; Based on the stiffness matrix, static finite element results are determined.

5. The method for evaluating the stability of a transport process of a mobile processing device according to claim 1, characterized in that: The performing modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model includes: constructing a dynamic expression for the modal analysis; Determine the node displacement vector; When the external excitation is 0, the dynamic expression is solved based on the node displacement vector to determine the natural frequency.

6. The method for evaluating the stability of a transport process of a mobile processing device according to claim 1, characterized in that: The determining of the road surface information parameter based on the road surface information parameter, based on the road surface information parameter, the natural frequency, the pre-processing data and the three-dimensional model includes: Based on the road surface information parameters, determining the road surface roughness power spectrum density, wherein the road surface roughness power spectrum density includes the road surface roughness spatial power spectrum density and the road surface roughness temporal power spectrum density; Determining a vibration condition of the three-dimensional model based on the road surface information parameter, the natural frequency, the pre-processed data, and the three-dimensional model; Based on the power spectrum density of the road surface roughness and the vibration condition, a stability result of the transport process of the movable processing device is obtained.

7. The method for evaluating the stability of a transport process of a movable processing device according to claim 6, characterized in that: In the case where there are multiple road surface information parameters, determining the road surface roughness spatial power spectrum density includes: The spatial power spectrum density of road roughness is calculated as follows: Where n is the spatial frequency corresponding to any road information parameter among the multiple road information parameters; n0 is the reference spatial frequency; G q (n0) is the power spectral density corresponding to the reference spatial frequency, G q (n) is the spatial power spectrum density of road roughness; W is the exponent of vibration frequency.

8. The method for evaluating the stability of a transport process of a mobile processing device according to claim 6, characterized in that: Determining the road surface roughness time power spectrum density includes: The road surface roughness time power spectrum density is calculated as follows: Among them, G q (f) is the time power spectrum density of road roughness, G q (n) is the spatial power spectrum density of road roughness, f is the time frequency, and u is the transportation speed of the three-dimensional model during transportation.

9. A transport process stability assessment device for a movable processing device, characterized in that: include: A modeling module, used to construct a three-dimensional model of a movable processing device, wherein the movable processing device is used to indicate a transportable and movable overall device fixed on a transport vehicle; A finite element module, used for performing mesh segmentation on the three-dimensional model to obtain a finite element model corresponding to the three-dimensional model; A data determination module, used to determine the pre-processing data corresponding to the three-dimensional model during the transportation process, and an acceleration factor during the transportation process; A statics module, used to determine the acceleration factor required during the transportation process, and obtain a statics finite element result based on the acceleration factor and the finite element model; A natural frequency module, used for performing modal analysis on the three-dimensional model based on the static finite element results to obtain the natural frequency of the three-dimensional model; The vibration characteristic module is used to determine the road surface information parameters, and based on the road surface information parameters, the natural frequency, the pre-processing data and the three-dimensional model, determine the stability result of the transportation process of the movable processing device.

10. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing a method for evaluating the stability of a transport process of a movable processing device as described in any one of claims 1 to 8.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of a method for evaluating the stability of a transport process of a movable processing device as described in any one of claims 1 to 8 are implemented.

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