CN-116552740-B - Design method of bearing bracket suitable for normal placement of thin plate sections

CN116552740BCN 116552740 BCN116552740 BCN 116552740BCN-116552740-B

Abstract

The invention provides a bearing bracket suitable for normal laying of thin plate segments and a design method thereof, the design method designs two types of universal brackets corresponding to the structural interval according to the structural sizes of the sheet sections and the total sections. And calculating and analyzing the two types of brackets by adopting a finite element calculation method, wherein the brackets meet the structural strength requirement. And the deformation of the segments and the bracket meet the precision construction requirement by selecting typical sheet segments for normal shelving scheme finite element calculation and analysis. The bracket has simple structure, repeated use and strong universality, can be suitable for a normal shelving scheme of sheet sections with various sizes, effectively controls the structural deformation of the sheet sections, and provides favorable conditions for the production, manufacture and transportation of ships.

Inventors

LUO PINGPING
ZHANG YI
MA ZHENZHONG
BU LINXIN
CHEN YONG
ZHANG LILI
WAN ZHIMIN
WANG SHUYING
LIU LANXUAN
ZHANG XIAO

Assignees

江南造船(集团)有限责任公司

Dates

Publication Date: 20260508
Application Date: 20230613

Claims (9)

1. The design method of the bearing bracket suitable for the normal resting of the thin plate section is characterized in that the bearing bracket comprises a first type of frame, a second type of frame and a supporting upright post for supporting the first type of frame and the second type of frame, wherein the first type of frame and the supporting upright post form a first type of bracket, and the second type of frame and the supporting upright post form a second type of bracket; The frame comprises a rectangular first surrounding frame, the first surrounding frame comprises two first transverse edges and two first longitudinal edges; The first frame is characterized in that the first frame is vertically overlooked from the upper side, longitudinal beams are longitudinally arranged in the first frame, 3 longitudinal beams are transversely distributed and uniformly divide the frame into 4 equal parts, 3 cross beams are longitudinally distributed in the first frame, the first frame is uniformly divided into 3 equal parts in the longitudinal direction by the first cross beam and the third cross beam, and the second cross beam is positioned at the symmetrical axis position of the first frame; the first cross beam and the two first longitudinal edges form two symmetrical first intersection points, the third cross beam and the two first longitudinal edges form two symmetrical first intersection points, each first intersection point is respectively connected with the midpoint of the nearest first cross edge through oblique beams, and 4 oblique beams are formed in a conformal mode; the design method comprises the following steps: S1, combing specification size, weight and structural characteristics of sheet sections, and determining the sheet section types suitable for a normal shelving scheme to be a detachable sheet section, a full-width deck section and a manufacturing small total group total section; S2, in the 1 st, 4 th, 5 th and 6 th groups of the sheet sections suitable for normal placement, the width of the sheet sections is smaller than 13m and the length is within 15m, wherein 50% of the sections are smaller than 10m, and in the 2 nd, 3 rd, 7 th, 8 th and 9 th groups, the length of the sheet sections is mostly more than 15m and the width is more than 14m; S3, dividing the sheet sections into two small-size sheet sections with the size of 12m and 10m and large-size sheet sections with the size of 20m and 15m according to the structural size interval of the sheet sections carded according to the character groups, and designing bracket structures with two sizes corresponding to the sheet sections and the total sections, namely a bracket type for placing and transporting the small-size sheet sections and a bracket type for placing and transporting the large-size sheet sections; S4, carrying out finite element strength calculation and analysis on the designed first-class bracket and second-class bracket by adopting frasttrack finite element calculation software, and respectively checking the structural stress and deformation of the bracket when the two types of universal brackets are subjected to sectional and total section gravity, so as to see whether the construction requirement is met; According to the calculated maximum weight of the sheet sections, the gravity is converted into uniform distribution force by finite element software to be loaded on the bracket, and the uniform distribution force is multiplied by a safety coefficient of 1.5, and according to the calculation and analysis, the deformation of one type of bracket is within 4mm when bearing the maximum uniform distribution load of 150t, and the deformation of the second type of bracket is within 5.7mm when bearing the maximum uniform distribution load of 240t, the structural stress and deformation of the bracket are considered to meet the requirements; S5, selecting a typical sheet section, adopting frasttrack finite element calculation software to perform simulation calculation on a normal shelving scheme of the sheet section, checking the actual deformation of the section and the bracket when the sheet section is placed on the bracket, and judging whether the construction precision requirement is met.
2. The method for designing a carrier rack for normal resting of sheet sections as set forth in claim 1, wherein the first transverse side, the first longitudinal side, the cross beam, the longitudinal beam, and the diagonal beam are I-beams, the I-beams comprising an upper panel, a lower panel, and a vertical web vertically connecting the upper panel and the lower panel.
3. The method of claim 2, wherein the first longitudinal edge between the first intersection point and the corner point of the first surrounding frame nearest thereto is a reinforcing section, the second longitudinal beams between the first cross beam and the third cross beam respectively and the first transverse edge nearest thereto are also reinforcing sections, reinforcing toggle plates are arranged at the middle points of the reinforcing sections, and the reinforcing toggle plates are arranged between the upper panel and the lower panel and are vertically and fixedly connected with the vertical webs, and 6 reinforcing toggle plates are arranged on the whole frame.
4. The method for designing the bearing bracket suitable for the normal resting of the thin plate segments according to claim 3, wherein U-shaped supporting grooves are further fixed below the lower panel at the reinforcing toggle plate and at four corner points of the first enclosing frame, each U-shaped supporting groove comprises three side plates which are vertically arranged, the three side plates are vertically connected end to form three enclosing baffles and corresponding side openings, the upper edges of the side plates are fixedly connected with the lower panel, and oval fixing holes are formed in the side plates to be connected with the supporting upright posts.
5. The method for designing the bearing bracket suitable for the normal resting of the thin plate segments according to claim 4, wherein the supporting upright post comprises a bottom plate and a column body perpendicular to the bottom plate, reinforcing upright plates connected with the bottom plate are arranged on the periphery of the lower portion of the column body so as to play a role in reinforcement, horizontal through holes are formed in the top of the column body, the supporting upright post is inserted into the U-shaped supporting groove, and the fixing holes are communicated with the through holes so as to achieve fixation through bolts or welding.
6. The design method of the bearing bracket suitable for the normal resting of the thin plate section according to claim 5, wherein the second type of frame comprises a rectangular second surrounding frame, the second surrounding frame comprises two second transverse edges and two second longitudinal edges, longitudinal supports which are longitudinally arranged are arranged in the second surrounding frame from the top, 6 longitudinal supports are transversely arranged and uniformly divide the second surrounding frame by 7 equal parts, 3 transverse supports which are longitudinally arranged are also arranged in the second surrounding frame, and the 3 transverse supports uniformly divide the first surrounding frame by 4 equal parts in the longitudinal direction; Dividing the second-class frame into four subareas along a transverse symmetry axis and a longitudinal symmetry axis, wherein the four subareas comprise a first diagonal bracing and a second diagonal bracing, and the first diagonal bracing and the second diagonal bracing of two adjacent subareas are symmetrically distributed about the transverse symmetry axis or the longitudinal symmetry axis; In the first partition, a first transverse strut adjacent to a second transverse side forms a second intersection point with the second longitudinal side, a first longitudinal strut adjacent to the second longitudinal side forms a third intersection point with the second transverse side, the second intersection point is connected with the third intersection point through a first diagonal strut, a first longitudinal strut adjacent to the second longitudinal side forms a fourth intersection point with a second transverse strut positioned on a transverse symmetry axis of the second type frame, a third longitudinal strut adjacent to the longitudinal symmetry axis of the second type frame forms a fifth intersection point with the second transverse side, and the fourth intersection point is connected with the fifth intersection point through a second diagonal strut.
7. The method for designing a carrier rack for normal resting of thin plate sections according to claim 6, wherein the second transverse edge, the second longitudinal edge, the cross brace, the longitudinal brace and the diagonal brace are all I-beams, and a reinforcing toggle plate is arranged at a sixth intersection point formed by the second diagonal brace and the cross brace nearest to the second transverse edge.
8. The method for designing a support bracket for normal resting of a sheet section according to claim 7, wherein the U-shaped supporting groove is further fixed below a lower panel at the sixth intersection point, at the second intersection point, at four corner points of the second surrounding frame, and at a seventh intersection point formed by the longitudinal support at the sixth intersection point and the second transverse edge, so as to connect the supporting upright posts.
9. The method for designing a carrier for normal resting of thin plate sections according to claim 8, wherein the first transverse edge and the first longitudinal edge are 12350mm, the second transverse edge is 21350mm and the second longitudinal edge is 16350mm, the thicknesses of the upper panel, the lower panel and the vertical web of the I-beam are 20mm, the height of the vertical web is 260mm, the widths of the upper panel and the lower panel are 350mm, and the thickness of the reinforcing toggle plate is 20mm.

Description

Design method of bearing bracket suitable for normal placement of thin plate sections Technical Field The invention relates to the technical field of ship construction, in particular to a bearing bracket suitable for normal laying of thin plate sections and a design method thereof. Background The hull parts are assembled according to the assembly division, and after welding, the hull parts are formed into individual sections, and the sections need to be placed on a jig frame before lifting after welding, which is called laying. The ship body segments are divided into three types, namely normal, reverse and horizontal, according to the characteristics of the structural form, the optimal construction mode is selected. The construction process needs the crane to cooperate with the lifting horse to turn over for a plurality of times, the subsequent turning over lifting horse and the reinforced dismantling work also aggravate the labor intensity of constructors, and the welding is extremely easy to deform after the thin plate is turned over in a segmented way, so that the precision requirement cannot be met, the reworking is needed, the production efficiency is greatly influenced, and the segmented reverse state is easy to accumulate water when being placed in a rainy season, so that the segmented construction is influenced. The ship product sections are mostly sheet semi-solid sections (sheet sections), the thickness of the sheet is below 8mm, most of deck areas are 5-6mm, and light bulkhead areas are 3-4mm, so that structural deformation is easy to generate. And most of the sections are left in a reverse state after the tire is removed, and the sections need to turn over for a plurality of times, so that the deformation control of the sheet sections is not facilitated, and the control of the building precision of the ship is affected. To reduce the number of turns, the deformation of the sheet segments is controlled, and a normal rest scheme of the sheet segments is implemented, as shown in fig. 1. However, the transverse and longitudinal compartment plates of some sectional structures are thin and weak, the fore and aft direction has a certain gradient, no bearing point exists when sand washing is normally placed, and a proper supportable bracket structure 200 needs to be placed below the thin plate section 100. Therefore, a suitable bearing bracket is designed by combining the characteristic of normal resting of the thin plate sections. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a normal general-purpose bracket for resting of a sheet section and a design method thereof, wherein the general-purpose bracket corresponding to a structural section of the sheet section and a structural section of the sheet section are designed according to structural dimensions of the sheet section and the general section, and structural strength of the general-purpose bracket is checked and optimized by adopting finite element computing software, so as to ensure that the bracket meets strength requirements. The application of the normal shelving general bracket can effectively control the deformation of the thin plate, thereby achieving the purposes of improving the control of the building precision of the ship, reducing the cost and enhancing the efficiency. To achieve the above and other related objects, the present invention provides a carrier suitable for normal resting of thin plate segments, the carrier comprising a first type of frame, a second type of frame and a support column for supporting the first type of frame or the second type of frame, wherein the first type of frame and the support column form a first type of carrier, and the second type of frame and the support column form a second type of carrier; The frame comprises a rectangular first surrounding frame, the first surrounding frame comprises two first transverse edges and two first longitudinal edges; The first frame is characterized in that the first frame is vertically overlooked from the upper side, longitudinal beams are longitudinally arranged in the first frame, 3 longitudinal beams are transversely distributed and uniformly divide the frame into 4 equal parts, 3 cross beams are longitudinally distributed in the first frame, the first frame is uniformly divided into 3 equal parts in the longitudinal direction by the first cross beam and the third cross beam, and the second cross beam is positioned at the symmetrical axis position of the first frame; The first cross beam and the two first longitudinal edges form two symmetrical first intersection points, the third cross beam and the two first longitudinal edges form two symmetrical first intersection points, each first intersection point is respectively connected with the midpoint of the nearest first cross edge through oblique beams, and 4 oblique beams are formed in a conformal mode. Preferably, the first transverse edge, the f