Design method and system of lifting and moving device

Abstract

The present invention belongs to the technical field of computer-aided design, and provides a design method and system for a lifting and moving device. The method comprises the following steps: performing finite element stress analysis on the lifting and moving device; calculating weak stress areas in each stress sub-area; marking weak stress areas on a three-dimensional model of the lifting and moving device as areas to be reinforced, and obtaining an optimized design three-dimensional model of the lifting and moving device with areas to be reinforced marked; intelligently marking weak stress areas on the lifting and moving device that include stress points that can balance stress in the horizontal direction, and strengthening the weak stress areas in subsequent manufacturing to enable the lifting and moving device to balance stress in the horizontal direction, thereby avoiding deformation of the lifting and moving device during operation, and enabling the hoisted building truss structure to be accurately positioned.

Description

Technical Field

[0001] The present invention belongs to the technical field of computer-aided design, and in particular relates to a design method and system for a lifting and moving device. Background Art

[0002] Large-scale construction sites, such as those in stadiums and exhibition centers, often feature large-span, high-tonnage prefabricated truss structures. These structures are initially assembled on the ground, allowing for welding, painting, and other tasks to be performed at ground level, significantly reducing overhead work and lowering construction risks. Hydraulic lifting equipment is then used, utilizing rigging such as steel strands, to smoothly lift the entire truss to its designed position. This lifting process requires precise control of lifting speed and synchronization to ensure uniform force distribution across the truss structure and prevent deformation. However, existing technologies typically employ in-situ lifting or one-way sliding, with the lifting and moving device lifting from the ground to the installation elevation before lowering it into position. This in-situ or one-way sliding method can result in deviations in the placement of the structure, making precise positioning impossible. This new technology, however, utilizes a translating track to lift the component to the designated elevation and then translate it in two directions for precise placement.

[0003] When designing a three-dimensional model of a lifting and moving device, it is often necessary to dynamically consider the impact of the specific lifting object on the lifting and moving device to avoid deformation, stress imbalance, and other effects on the truss structure of the lifting object during the lifting process. Summary of the Invention

[0004] The purpose of the present invention is to propose a design method and system for a lifting and moving device to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0005] In order to achieve the above object, the present invention proposes a design method for a lifting and moving device, which specifically includes the following steps:

[0006] S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh to obtain a finite element mesh model;

[0007] S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud map;

[0008] S300, using the watershed algorithm to extract the watershed line of the force cloud map;

[0009] S400, dividing the force cloud map into a plurality of force sub-regions formed by respective watershed lines;

[0010] S500, calculating the weak stress area in each stress sub-area;

[0011] S600: Mark the weak areas on the three-dimensional model of the lifting and moving device as areas to be strengthened, and obtain an optimized three-dimensional model of the lifting and moving device with the areas to be strengthened marked.

[0012] The three-dimensional model is a three-dimensional model obtained by scanning the lifting and moving device with a 3D scanner.

[0013] Furthermore, the grid division method is to divide the three-dimensional model into free grids.

[0014] Furthermore, in S400, the method for dividing the force cloud map into multiple force sub-regions composed of various watershed lines is: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area composed of each watershed line is greater than MYL is marked as a force sub-region; or, the minimum value of the points on each watershed line is the boundary force minimum value; each area composed of each watershed line whose boundary force minimum value is greater than MYL is recorded as a force sub-region.

[0015] Since the load-bearing structure of the lifting and moving device is supported by multiple steel structures connected to each other, the pressure is transmitted to the lower steel structure, and the lower steel structure is transmitted to the bottom structure; during the operation of the lifting and moving device, it is subjected to bending deformation under the weight. In the application scenario where the large building truss structure needs to be precisely positioned, the load-bearing structure of the lifting and moving device is a bending member when it bears the large load of the building truss structure. Since the load direction of the building truss structure is directly opposite to the bending member, the bending member is prone to bending deformation at this time, making it impossible for the building truss structure to be precisely positioned. The existing method is generally to thicken the bending member or stack multiple bending members; the longitudinal movement frame and the transverse movement frame on the lifting and moving device of the present application convert the bending member into an axial load-bearing member to connect the load point with the support point to avoid deformation. In the axial load-bearing member, the load of the building truss structure will be decomposed into forces in the connecting rod direction and the horizontal direction;

[0016] If the force-bearing sub-regions are not adjacent, that is, the force-bearing sub-regions are independently distributed, then a simple finite element analysis can intuitively determine the area with greater horizontal force when subjected to a larger load. However, if multiple force-bearing sub-regions are adjacent to each other, or even continuous small-scale range-bound force-bearing sub-regions appear, the load in one area will be equal to or even greater than that of a single force-bearing sub-region. It is impossible to accurately determine the area with greater horizontal force when subjected to a larger load (because there are many and discrete force points, it is impossible to accurately locate the area with a high probability of deformation due to load bearing). The present application uses the following method to mark the weak force area on the lifting and moving device that contains the force points that can balance the horizontal force, so that strengthening the weak force area in subsequent manufacturing can enable the lifting and moving device to balance the horizontal force, avoid deformation of the lifting and moving device during operation, and thus enable the hoisted building truss structure to be accurately positioned. The specific method is:

[0017] Furthermore, in S500, the method for calculating the weak area in each stressed sub-area is:

[0018] The point with the largest stress value in each force-bearing sub-region is recorded as the force-bearing point; the average stress value of each point in the force-bearing sub-region is recorded as the regional force value; the force-bearing sub-region with the largest regional force value in each force-bearing sub-region is recorded as the support point region; the force-bearing point in the support point region is recorded as the support point; the distance between the support point and the force-bearing point of each force-bearing sub-region is recorded as the component arm distance of each force-bearing sub-region;

[0019] Perform mutual influence screening on each force-bearing sub-region except the support point region in turn to obtain the mutual influence region;

[0020] The weak areas in each stressed sub-area are marked according to the mutual influence areas.

[0021] Furthermore, the method for performing mutual influence screening to obtain the mutual influence area is:

[0022] The force sub-region to be screened for mutual influence is the current force sub-region. The force sub-region with the smallest non-zero difference between the force arm distance and the force arm distance of the current force sub-region and the regional force value of each force sub-region other than the support point region is recorded as the current minimum force region. The force sub-region with the largest non-zero difference between the force arm distance and the force arm distance of the current force sub-region and the regional force value of each force sub-region other than the support point region is recorded as the current maximum force region. (When selecting the current minimum force region and the current maximum force region, the minimum force region must not only have a lower force value but also be relatively close to the current force sub-region in force arm distance. The maximum force region also has a lower force value but a larger difference in force arm distance. In this way, the two regions with the greatest and least influence on the current force sub-region through force conduction can be accurately located.)

[0023] The plane determined by the force point of the current minimum force area, the force point of the current maximum force area, and the support point is the current force surface; the intersection line of the current force surface and the cross-section plane of the three-dimensional force cloud map is the current intersection line; all force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-areas.

[0024] Among them, since the mutual influence area is the area where the load of the two-dimensional cross-section of the force cloud map is cut by the cutting plane located by the above three force points, each mutual influence area is the load decomposition position of the interaction force between each point in the force cloud map for the current force sub-area (because the force of the current force sub-area is not a simple sum of the forces of each point on its force surface, but refers to the interaction force between each point in the force cloud map. These forces have an effect and maintain balance within the entire force cloud map); by estimating the mutual influence area, it is possible to accurately locate in subsequent steps the weak force areas where the probability of deformation due to load is high and cannot be accurately located due to the large number of discrete force points.

[0025] Furthermore, the method for marking the weak areas in each stressed sub-area according to the mutual influence area is as follows:

[0026] Determine whether the mutual influence area of ​​each stressed sub-area is nonlinearly stressed. If so, mark the current stressed sub-area as a weak stressed area.

[0027] Among them, most of the deformation of the lifting and moving device during operation is caused by the load of multiple discrete adjacent force sub-areas or continuous small-scale range force sub-areas with a large number of force points, and the weak force area is the force sub-area affected by the interaction force between these multiple adjacent mutual influence areas or continuous small-scale range mutual influence areas. Optimizing and strengthening the weak force area can greatly reduce the probability of deformation caused by bearing large loads, so that the hoisted building truss structure can be accurately positioned.

[0028] Furthermore, the method for determining whether the mutually influenced region of each stressed sub-region is nonlinearly stressed is as follows:

[0029] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0030] The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the increasing force region of the ith mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the decreasing force region of the ith mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the ith mutual influence region and the regional force value of the decreasing force region of the ith mutual influence region is taken as Diff(i);

[0031] If, when traversing i from 1 to N, Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

[0032] Among them, by judging that the mutual influence area of ​​the current force-bearing sub-area is nonlinear, it is possible to accurately identify whether the interaction forces between the various mutual influence areas of the current force-bearing sub-area have a common effect on the current force-bearing sub-area. If it is nonlinear, it means that there is an unbalanced large load influence between the various mutual influence areas, which has a greater impact on the current force-bearing sub-area. The mutual influence areas affected by these sources of unbalanced large loads have a greater probability of causing the current force-bearing sub-area position to deform. Therefore, it is necessary to mark these force-bearing sub-areas subjected to nonlinear force loads (the linear force of the mutual influence area of ​​the current force-bearing sub-area indicates that a balanced load is applied between the various mutual influence areas to affect the force-bearing sub-area, and the force-bearing sub-areas The force load in the region is decomposed and offset between each mutually influencing region, and it is not easy to produce deformation). That is, since the force-increasing region and the force-reducing region are the decomposition forces in the two force decomposition directions of the current force region, their difference can reflect whether it is a linear balance of force. Therefore, as long as the difference between the force-increasing region and the force-reducing region is locally minimal, it does not have continuous linear force. However, since the source of the unbalanced large load is often not necessarily a continuous adjacent region or a single region, and sometimes it is caused by several force points, the above method cannot accurately identify it. Therefore, it is necessary to further improve the judgment of whether it is nonlinear force through the following directions, specifically:

[0033] Preferably, the method for determining whether the mutually influenced region of each stressed sub-region is nonlinearly stressed is replaced by:

[0034] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0035] The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is recorded as the decremental sum;

[0036] When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current maximum force region is used as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current minimum force region is used as the cumulative force difference DiV(i);

[0037] If, when traversing i from 1 to N, DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

[0038] Among them, the sum of increments and the sum of decrements are respectively the incremental accumulation and decrement accumulation of the decomposed forces of the current force area in the two force decomposition directions of each mutually influential area in turn. Therefore, the difference can reflect the linear balance of the loads of all mutually influential areas on the current force area. The cumulative force difference obtained by selecting the direction with the larger accumulated force can show the influence of the resultant force of the force points of multiple mutually influential areas on the current force area at the same time, so as to avoid the influence of the resultant force of non-adjacent continuous mutually influential areas on the force of the current force area at the same time, which affects the recognition accuracy of nonlinear force.

[0039] Preferably, reinforcing ribs are welded at corresponding positions of each area to be reinforced on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0040] Preferably, laser shock peening is performed on corresponding positions of each area to be strengthened on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0041] The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling. The longitudinal and transverse frames are made of Q355E square tubes, each consisting of a main frame of three 280×280×12mm square tubes, and the rest of the parts are 80*10 seamless tubes. The model is 9700mm long, and the center distance between the longitudinal and transverse frames is 3514mm.

[0042] The loads and constraints in the finite element force analysis are as follows: a load of 220,000 N is applied to the force position of the finite element mesh model of the lifting and moving device during the lifting operation (in order to consider the gap between the actual structure and the ideal structure in the steel structure design of the lifting and moving device and ensure the structural safety of the lifting and moving device. Increasing the design load on the basis of the actual load can avoid potential risks. The weight of the lifting and moving device is approximately 8,000 kg, and the maximum lifting weight of the lifting and moving device during operation is approximately 10,000 kg. Based on the self-weight magnification factor of 1.3 times, the maximum load value is taken as 220,000 N).

[0043] Among them, the stress value (unit: MPa) of each point on the force cloud diagram of the finite element mesh model is measured.

[0044] A lifting and moving device is designed based on an optimized design three-dimensional model of the lifting and moving device marked with areas to be strengthened obtained according to a design method of a lifting and moving device. The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling.

[0045] The lifting bracket includes several lifting bracket lattice columns and column top frames, wherein several lifting bracket lattice columns are stacked longitudinally, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice column can include multiple specifications, and the length and width dimensions of each specification are consistent, but there are differences in height. The lifting bracket can be adjusted by setting different lifting bracket lattice columns.

[0046] The longitudinal moving frame is arranged on the top of two lifting brackets, the transverse moving frame is arranged on the longitudinal moving frame, and the lifting assembly is arranged on the transverse moving frame.

[0047] The lateral and longitudinal frames are steel frame structures, with sliding wheels and locking devices provided at the bottom, and sliding tracks provided at the corresponding positions of the longitudinal and column top frames. In addition, the lateral and longitudinal frames 2 are also provided with sliding wheel drive motors.

[0048] The specific structures of the lifting assembly, the sliding wheels of the transverse frame and their drive motors, and the locking devices are common knowledge in the field.

[0049] The lifting assembly includes a lifting jack and a lifting steel strand, and the lower portion of the lifting steel strand is connected to the spreader.

[0050] The sling includes an upper crossbeam, diagonal steel strands, a lower crossbeam, and lifting lugs. The upper crossbeam is connected to the lifting strands of the lifting assembly. Both sides of the upper crossbeam are connected to the lower crossbeam via diagonal steel strands. The lower crossbeam has several lifting lugs symmetrically positioned on both sides for connection to the roof truss.

[0051] The lifting and moving device, which installs a bidirectional translation track at the top of the lifting point, first lifts the component to the specified elevation, then translates it in two directions via the sliding track, ultimately landing it in the specified position. This is independent of whether the support points of the structure being lifted have been constructed. Construction can be performed first on the support points and supports of the structure being lifted, and then, after lifting to a certain height, it can be translated to the support position, achieving precise placement via the bidirectional sliding track. Existing in-situ lifting technologies, however, do not allow for pre-construction of the support points of the structure being lifted, or unidirectional sliding cannot achieve precise planar positioning. Therefore, if the support points are constructed first, in-situ assembly and lifting are impossible.

[0052] The present invention also provides a design system for a lifting and moving device. The design system for a lifting and moving device includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the design method for a lifting and moving device are implemented. The design system for a lifting and moving device can be run on computing devices such as desktop computers, laptop computers, PDAs, and cloud data centers. The executable system may include, but is not limited to, a processor, a memory, and a server cluster. The processor executes the computer program to run in the following system units:

[0053] A finite element modeling unit is used to import a three-dimensional model of the lifting and moving device into the finite element software to divide the mesh and obtain a finite element mesh model;

[0054] Force element analysis unit, used to perform finite element force analysis on the finite element mesh model to obtain a force cloud map;

[0055] A watershed extraction unit, used to extract the watershed line of the force cloud map using a watershed algorithm;

[0056] A sub-region segmentation unit is used to segment the force cloud map into multiple force sub-regions composed of various watershed lines;

[0057] A weakness identification unit is used to calculate the weak areas in each stressed sub-area;

[0058] The unit for marking to be strengthened is used to mark the weak areas on the three-dimensional model of the lifting and moving device as areas to be strengthened, and obtain an optimized three-dimensional model of the lifting and moving device with the areas to be strengthened marked.

[0059] The beneficial effects of the present invention are as follows: the present invention provides a design method for a lifting and moving device, which intelligently marks the weak stress area on the lifting and moving device that contains the stress point that can balance the horizontal force. By strengthening the weak stress area in subsequent manufacturing, the lifting and moving device can balance the horizontal force, avoiding deformation of the lifting and moving device during operation, so that the hoisted building truss structure can be accurately positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and other features of the present invention will become more apparent through a detailed description of the embodiments shown in conjunction with the accompanying drawings. In the drawings of the present invention, the same reference numerals represent the same or similar elements. Obviously, the drawings described below are only some embodiments of the present invention. It is possible for a person skilled in the art to derive other drawings based on these drawings without inventive effort. In the drawings:

[0061] Figure 1 A flowchart of a design method for a lifting and moving device;

[0062] Figure 2 It is to perform finite element force analysis on the finite element mesh model to obtain the force cloud map;

[0063] Figure 3 This is a schematic diagram of the overall scheme of the lifting and moving device of the present invention;

[0064] Figure 4 It is a partial enlarged schematic diagram of the upper part of the lifting and moving device of the present invention;

[0065] Figure 5 It is a schematic diagram of the sling of the lifting and moving device of the present invention;

[0066] Figure 6 This is a schematic diagram of a usage scenario of the lifting and moving device of the present invention;

[0067] Figure 7 This is a schematic diagram of the operation process of the lifting and moving device of the present invention;

[0068] Figure 8 This is a structural diagram of a design system for a lifting and moving device.

[0069] In the figure: 1. Lifting bracket; 2. Longitudinal frame; 3. Transverse frame; 4. Lifting assembly; 5. Spreader; 51. Upper beam; 52. Diagonal steel strand; 53. Lower beam; 54. Lifting lug. DETAILED DESCRIPTION

[0070] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0071] Example 1

[0072] like Figure 1 The flowchart of the design method of a lifting and moving device according to the present invention is shown. Figure 1 The following describes a design method for a lifting and moving device according to an embodiment of the present invention and describes a preferred embodiment in detail. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0073] S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh to obtain a finite element mesh model;

[0074] S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud map;

[0075] S300, using the watershed algorithm to extract the watershed line of the force cloud map;

[0076] S400, dividing the force cloud map into a plurality of force sub-regions formed by respective watershed lines;

[0077] S500, calculating the weak stress area in each stress sub-area;

[0078] S600: Mark the weak areas on the three-dimensional model of the lifting and moving device as areas to be strengthened, and obtain an optimized three-dimensional model of the lifting and moving device with the areas to be strengthened marked.

[0079] Further, if Figure 2 The force cloud map (the force cloud map of the lifting bracket part in the lifting and moving device) is obtained by performing finite element force analysis on the finite element mesh model through finite element software.

[0080] The three-dimensional model is a three-dimensional model obtained by scanning the lifting and moving device with a 3D scanner.

[0081] Preferably, the 3D model is a SolidWorks model, a CREO 3D model

[0082] Furthermore, the grid division method is to divide the three-dimensional model into free grids.

[0083] Furthermore, in S400, the method for dividing the force cloud map into multiple force sub-regions composed of various watershed lines is: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area composed of various watershed lines is greater than MYL is marked as a force sub-region.

[0084] Furthermore, in S500, the method for calculating the weak area in each stressed sub-area is:

[0085] The point with the largest stress value in each force-bearing sub-region is recorded as the force-bearing point; the average stress value of each point in the force-bearing sub-region is recorded as the regional force value; the force-bearing sub-region with the largest regional force value in each force-bearing sub-region is recorded as the support point region; the force-bearing point in the support point region is recorded as the support point; the distance between the support point and the force-bearing point of each force-bearing sub-region is recorded as the component arm distance of each force-bearing sub-region;

[0086] Perform mutual influence screening on each force-bearing sub-region except the support point region in turn to obtain the mutual influence region;

[0087] The weak areas in each stressed sub-area are marked according to the mutual influence areas.

[0088] Furthermore, the method for performing mutual influence screening to obtain the mutual influence area is:

[0089] The force sub-region to be screened for mutual influence is the current force sub-region. The force sub-region whose regional force value is less than the regional force value of the current force sub-region, and whose force arm difference with the force arm of the current force sub-region is the smallest, is recorded as the current minimum force region. The force sub-region whose regional force value is less than the regional force value of the current force sub-region, and whose force arm difference with the force arm of the current force sub-region is the largest, is recorded as the current maximum force region.

[0090] The plane determined by the force point of the current minimum force area, the force point of the current maximum force area, and the support point is the current force surface; the intersection line of the current force surface and the cross-section plane of the three-dimensional force cloud map is the current intersection line; all force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-areas.

[0091] Furthermore, the method for marking the weak areas in each stressed sub-area according to the mutual influence area is as follows:

[0092] Determine whether the mutual influence area of ​​each stressed sub-area is nonlinearly stressed. If so, mark the current stressed sub-area as a weak stressed area.

[0093] Furthermore, the method for determining whether the mutually influenced region of each stressed sub-region is nonlinearly stressed is as follows:

[0094] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0095] The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the increasing force region of the ith mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the decreasing force region of the ith mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the ith mutual influence region and the regional force value of the decreasing force region of the ith mutual influence region is taken as Diff(i);

[0096] If, when traversing i from 1 to N, Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

[0097] Preferably, reinforcing ribs are welded at corresponding positions of each area to be reinforced on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0098] The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling. The longitudinal and transverse frames are made of Q355E square tubes, each consisting of a main frame of three 280×280×12mm square tubes, and the rest of the parts are 80*10 seamless tubes. The model is 9700mm long, and the center distance between the longitudinal and transverse frames is 3514mm.

[0099] The loads and constraints in the finite element force analysis are as follows: a load of 220,000 N is applied to the force position of the finite element mesh model of the lifting and moving device during the lifting operation (in order to consider the gap between the actual structure and the ideal structure in the steel structure design of the lifting and moving device and ensure the structural safety of the lifting and moving device. Increasing the design load on the basis of the actual load can avoid potential risks. The weight of the lifting and moving device is approximately 8,000 kg, and the maximum lifting weight of the lifting and moving device during operation is approximately 10,000 kg. Based on the self-weight magnification factor of 1.3 times, the maximum load value is taken as 220,000 N).

[0100] Among them, the stress value (unit: MPa) of each point on the force cloud diagram of the finite element mesh model is measured.

[0101] Example 2

[0102] In this embodiment 2, the following contents are replaced on the basis of embodiment 1:

[0103] In S400, the method for dividing the force cloud map into multiple force sub-regions composed of various watershed lines is as follows: the average stress value of the points on all watershed lines on the force cloud map is MYL; the minimum value of the points on each watershed line is the minimum boundary force value; and each region composed of each watershed line whose minimum boundary force value is greater than MYL is recorded as a force sub-region.

[0104] Preferably, the method for determining whether the mutually influenced region of each stressed sub-region is nonlinearly stressed is replaced by:

[0105] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0106] The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is recorded as the decremental sum;

[0107] When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current maximum force region is used as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current minimum force region is used as the cumulative force difference DiV(i);

[0108] If, when traversing i from 1 to N, DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

[0109] Preferably, laser shock peening is performed on corresponding positions of each area to be strengthened on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0110] An embodiment of the present invention provides a lifting and moving device, which is designed according to an optimized design three-dimensional model of a lifting and moving device with an area to be strengthened obtained by a design method of a lifting and moving device in embodiment 1 or embodiment 2. By setting a bidirectional translation track on the top of the lifting point, the lifted component is first lifted to a specified elevation, and then translated in two directions by the sliding track, and then positioned to a specified position by translation. It is not affected by whether the support points of the lifted structure are constructed. The support points and supports of the lifted structure can be constructed first, and then after being lifted to a certain height, it can be translated to the support position, and precise positioning can be achieved by the bidirectional sliding track. However, the existing in-situ lifting technology cannot construct the support points of the lifted structure first or the one-way sliding cannot achieve precise positioning of the plane position. If the support points are constructed first, in-situ assembly and lifting cannot be achieved.

[0111] like Figure 3 、 Figure 4 、 Figure 5 As shown, Figure 3 This is a schematic diagram of the overall scheme of the lifting and moving device of the present invention; Figure 4 It is a partial enlarged schematic diagram of the upper part of the lifting and moving device of the present invention; Figure 5The present invention is a schematic diagram of the lifting and moving device of the spreader; the lifting and moving device includes a lifting bracket 1, a longitudinal frame 2, a transverse frame 3, a lifting assembly 4, a spreader 5;

[0112] The lifting bracket 1 includes several lifting bracket lattice columns and column top frames, wherein several lifting bracket lattice columns are stacked longitudinally, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice column can include multiple specifications, and the length and width dimensions of each specification are consistent, but there are differences in height. The lifting bracket 1 can be adjusted by setting different lifting bracket lattice columns.

[0113] The longitudinal moving frame 2 is arranged on the top of the two lifting brackets 1 , the transverse moving frame 3 is arranged on the longitudinal moving frame 2 , and the lifting assembly 4 is arranged on the transverse moving frame 3 .

[0114] The lateral frame 3 and longitudinal frame 2 are steel frame structures, with sliding wheels and locking devices provided at the bottom, and sliding tracks provided at the corresponding positions of the longitudinal frame 2 and the column top frame. In addition, the lateral frame 3 and longitudinal frame 2 are also provided with sliding wheel drive motors.

[0115] The specific structures of the lifting assembly 4, the sliding wheels of the transverse frame 3 and their driving motors, and the locking device are conventional knowledge in the field.

[0116] The lifting assembly 4 includes a lifting jack and a lifting steel strand, and the lower portion of the lifting steel strand is connected to the spreader 5.

[0117] The sling 5 includes an upper crossbeam 51, diagonal steel strands 52, a lower crossbeam 53, and lifting lugs 54. The upper crossbeam 51 is connected to the lifting strands of the lifting assembly 4. Both sides of the upper crossbeam 51 are connected to the lower crossbeam 53 via diagonal steel strands 52. Several lifting lugs 54 (four in the figure) are symmetrically arranged on both sides of the lower portion of the lower crossbeam 53. These lifting lugs 54 are used to connect to the roof truss.

[0118] It should be noted that the above-mentioned longitudinal and lateral movements are directions agreed upon by the applicant and are both horizontal movements, without involving changes in height.

[0119] In the applicant's embodiment, Figure 6 In the usage scenario diagram shown, according to Figure 7The schematic diagram of the operation flow is as follows: After the installation of the entire roof truss and electrical, HVAC, and other accessories is complete, the assembly brackets are removed to bring the truss system to the designed state, and the supports are installed according to the design drawings. After completing the preparation, trial lift, and monitoring processes, the lifting operation begins. The lifting system's lifting lugs and lower crossbeam are then installed at the designated truss position. The lifting and moving device is then assembled, including the installation of the lifting bracket lattice columns, column top frame, longitudinal frame, and transverse frame. After the main body of the lifting and moving device is assembled on-site, the upper crossbeam and steel strands of the lifting device are installed, and the diagonal strands are pre-tensioned. Next, the side guy cables of the bracket are installed, using φ19 steel wire rope. The truss and accessories are hoisted to a height of 350-500mm above the designed position and then stopped. After the lifting stops, the truss is monitored and the acquired data is compared with the construction design values. If it meets the requirements, preparations for longitudinal movement are made. During longitudinal movement, the wheel longitudinal locking devices are released, and the truss is moved longitudinally a predetermined distance. Once in position, the wheel longitudinal locking devices are re-locked. The wheel transverse locking devices are then released. Move the truss horizontally for a preset distance and tighten the wheel lateral locking device again after it is in place. After the movement is completed, monitor the truss again and compare the acquired data with the construction design value. If it meets the requirements, prepare for dismantling.

[0120] An embodiment of the present invention provides a design system for a lifting and moving device, such as Figure 8 As shown, a design system for a lifting and moving device in this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned embodiment of the design method for a lifting and moving device are implemented. The processor executes the computer program to run in the following system units:

[0121] A finite element modeling unit is used to import a three-dimensional model of the lifting and moving device into the finite element software to divide the mesh and obtain a finite element mesh model;

[0122] Force element analysis unit, used to perform finite element force analysis on the finite element mesh model to obtain a force cloud map;

[0123] A watershed extraction unit, used to extract the watershed line of the force cloud map using a watershed algorithm;

[0124] A sub-region segmentation unit is used to segment the force cloud map into multiple force sub-regions composed of various watershed lines;

[0125] A weakness identification unit is used to calculate the weak areas in each stressed sub-area;

[0126] The unit for marking to be strengthened is used to mark the weak areas on the three-dimensional model of the lifting and moving device as areas to be strengthened, and obtain an optimized three-dimensional model of the lifting and moving device with the areas to be strengthened marked.

[0127] The design system for a lifting and moving device includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned embodiment of the design method for a lifting and moving device are implemented. The design system for a lifting and moving device can be run on computing devices such as desktop computers, laptop computers, PDAs, and cloud data centers. The executable system may include, but is not limited to, a processor, a memory, and a server cluster.

[0128] The design system for a lifting and moving device can be run on computing devices such as desktop computers, laptops, PDAs, and cloud data centers. The design system for a lifting and moving device includes, but is not limited to, a processor and memory. Those skilled in the art will appreciate that the example is merely an illustration of a design method and system for a lifting and moving device and does not constitute a limitation on the design method and system for a lifting and moving device. The system may include more or fewer components than the example, or a combination of certain components, or different components. For example, the design system for a lifting and moving device may also include input and output devices, network access devices, buses, and the like.

[0129] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete component gate circuits or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the design system of the lifting and moving device, and utilizes various interfaces and lines to connect various sub-areas of the entire design system of the lifting and moving device.

[0130] The memory can be used to store the computer programs and / or modules. The processor implements the various functions of the design method and system for a lifting and moving device by running or executing the computer programs and / or modules stored in the memory and accessing the data stored in the memory. The memory may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data and a phone book). Furthermore, the memory may include high-speed random access memory (RAM) and non-volatile memory, such as a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0131] Although the present invention has been described in considerable detail and with particularity with respect to several embodiments, it is not intended to limit the present invention to any of these details or embodiments or any particular embodiment, so as to effectively encompass the intended scope of the present invention. In addition, the present invention has been described above with respect to embodiments foreseen by the inventors for the purpose of providing a useful description, and those insubstantial modifications of the present invention that are not currently foreseen may still represent equivalent modifications of the present invention.

Claims

1. A design method for a lifting and moving device, characterized in that: The method comprises the following steps: S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh into a finite element mesh model; S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud map; S300, using the watershed algorithm to extract the watershed line of the force cloud map; S400, dividing the force cloud map into a plurality of force sub-regions formed by respective watershed lines; S500, calculating the weak stress area in each stress sub-area; S600, marking weak areas on the three-dimensional model of the lifting and moving device as areas to be strengthened, and obtaining an optimized design three-dimensional model of the lifting and moving device with the areas to be strengthened marked; In S500, the method for calculating the weak force area in each stressed sub-area is as follows: the point with the maximum stress value in each stressed sub-area is recorded as the stressed point; the average stress value of each point in the stressed sub-area is recorded as the regional stress value; the stressed sub-area with the maximum regional stress value in each stressed sub-area is recorded as the support point area; the stressed point in the support point area is recorded as the support point; the distance between the support point and the stressed point of each stressed sub-area is recorded as the component force arm distance of each stressed sub-area; each stressed sub-area except the support point area is sequentially subjected to mutual influence screening to obtain the mutual influence area; and the weak force area in each stressed sub-area is marked according to the mutual influence area. The method for performing mutual influence screening to obtain the mutual influence region is as follows: the force sub-region to be screened for mutual influence is taken as the current force sub-region, and the force sub-region whose regional force value is less than the regional force value of the current force sub-region, and whose force arm difference with the force arm difference of the current force sub-region is the smallest, is recorded as the current minimum force region; the force sub-region whose regional force value is less than the regional force value of the current force sub-region, and whose force arm difference with the force arm difference of the current force sub-region is the largest, is recorded as the current maximum force region; The plane determined by the force point of the current minimum force area, the force point of the current maximum force area and the support point is the current force surface; the intersection line of the current force surface and the cross-section plane of the three-dimensional force cloud map is the current intersection line; all the force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-area; Among them, the method of marking the weak force area in each stressed sub-area according to the mutual influence area is: judging whether the mutual influence area of ​​each stressed sub-area is nonlinear, and if so, marking the current stressed sub-area as a weak force area.

2. The design method of a lifting and moving device according to claim 1, characterized in that: In S400, the method for dividing the force cloud map into multiple force sub-regions composed of various watershed lines is as follows: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area composed of each watershed line is greater than MYL is recorded as a force sub-region; or, the minimum value of the points on each watershed line is used as the boundary force minimum value; each area composed of each watershed line whose boundary force minimum value is greater than MYL is recorded as a force sub-region.

3. The design method of a lifting and moving device according to claim 1, characterized in that: The specific method for judging whether the mutual influence area of ​​each force sub-area is nonlinear force is as follows: According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list; The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the increasing force region of the ith mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the mutual influence region from the 1st to the ith mutual influence region in the influence list is recorded as the decreasing force region of the ith mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the ith mutual influence region and the regional force value of the decreasing force region of the ith mutual influence region is taken as Diff(i); If, when traversing i from 1 to N, Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

4. The design method of a lifting and moving device according to claim 3, characterized in that: The method for determining whether the mutual influence area of ​​each force sub-area is nonlinear force is replaced by: According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list; The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is recorded as the decremental sum; When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current maximum force region is used as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum regional force value corresponding to the 1st to the i-th mutually influenced regions in the influence list and the regional force value of the current minimum force region is used as the cumulative force difference DiV(i); If, when traversing i from 1 to N, DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), the mutual influence area of ​​the current force sub-area is nonlinear force, otherwise it is linear force.

5. A design system for a lifting and moving device, characterized in that: The design system for a lifting and moving device includes: a processor, a memory, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps in the design method for a lifting and moving device described in any one of claims 1 to 4 are implemented.

6. A lifting and moving device, wherein the lifting and moving device is designed according to an optimized design three-dimensional model of the lifting and moving device marked with areas to be strengthened obtained by a design method for a lifting and moving device according to any one of claims 1 to 4, and the lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly and a sling.

7. The lifting and moving device according to claim 6, characterized in that: The lifting bracket includes several lifting bracket lattice columns and column top frames, wherein several lifting bracket lattice columns are stacked longitudinally, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice columns include multiple specifications, and the length and width dimensions of each specification are consistent, but there are differences in height. The adjustment of the lifting bracket is achieved by setting different lifting bracket lattice columns.

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