Hydrogen storage system lightweight support structure based on CAE simulation optimization

Abstract

The utility model discloses a hydrogen storage system lightweight support structure based on CAE (computer aided engineering) simulation optimization, which comprises a bearing frame for mounting a hydrogen cylinder, an automobile frame left longitudinal beam, an automobile frame right longitudinal beam and a fixing support. And two groups of fixing brackets are arranged between the bearing frame, the left longitudinal beam of the automobile frame and the second connecting frame, so that the bearing frame, the left longitudinal beam of the automobile frame and the right longitudinal beam of the automobile frame are connected into a lightweight bracket structure. The number of parts and machining cost are reduced, the upper portion of the support is welded to the bearing frame, the lower portion of the support is connected with the frame through bolts, assembly is simplified, and errors are reduced; through CAE simulation optimization parameters, the harsh working conditions such as dynamic impact are met, the strength and reliability are remarkably improved under the same material, and meanwhile, great weight reduction is achieved; a multi-point three-dimensional composite welding interface is adopted, the welding area is increased, stress is dispersed, and interface cracking or fatigue failure is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a hydrogen storage system light weight support structure based on CAE simulation optimization. BACKGROUND

[0002] With the acceleration of global energy transformation, hydrogen energy is increasingly widely used in the field of transportation due to its clean and efficient characteristics. The safety and stability of the hydrogen storage system, which is composed of high-pressure hydrogen storage bottles, valves, and pipelines, play a decisive role in the performance and reliability of the vehicle. The hydrogen storage system is generally installed on the bearing bracket, and then connected to the vehicle frame structure through the fixed bracket, to ensure that it can withstand various dynamic loads such as vibration, impact, and acceleration changes during vehicle operation.

[0003] However, in the prior art, there are many deficiencies in the design of the hydrogen storage system fixing bracket. The traditional design mostly uses mechanical connection, the most common being a rigid bracket structure based on welding or bolt connection. This bracket is usually made of metal plates (such as steel or aluminum alloy) and is formed into a simple L-shaped or U-shaped structure through stamping, bending, and welding processes, which is used to fix the hydrogen storage system frame on the vehicle frame rail. Its advantages are simple structure, low manufacturing cost, and convenient installation, but its limitations are also very obvious. On the one hand, the dependence on experience design makes it difficult to fully consider the dynamic load distribution of the bracket geometry, and stress concentration areas may occur after long-term use, leading to cracks and fatigue failure. On the other hand, the weight is relatively large, which does not meet the requirements of vehicle lightweighting and increases the energy consumption of the vehicle.

[0004] In addition, there is another similar prior art solution that uses a composite material bracket, such as carbon fiber reinforced polymer (CFRP). This material has high strength-to-weight ratio and good corrosion resistance, and in some high-end new energy vehicles, it is formed through a molding process and is bonded or mechanically connected to the vehicle frame. Although it has certain effect in reducing weight, due to the anisotropic properties of composite materials, complex analysis is required during design, and existing analysis methods are insufficient, often leading to peeling or failure at the connection interface. Moreover, the cost of composite materials is high, and the production process is complex, which limits its widespread application in mass production.

[0005] Overall, the existing design of the hydrogen storage system fixing bracket generally has problems such as structural redundancy and low optimization level, which not only affects the reliability and economy of the bracket, but also restricts the overall development of hydrogen energy vehicles. Therefore, developing a new hydrogen storage system fixing bracket structure to achieve weight reduction, strength improvement, and fatigue life extension has become an urgent problem in the industry. INVENTION CONTENTS

[0006] The utility model discloses an embodiment provides a kind of lightweight support structure of hydrogen storage system based on CAE simulation optimization, to solve the technical problems that traditional hydrogen storage system fixed support design relies on experience, there is stress concentration and fatigue failure risk, heavy and optimization deficiency, provide a kind of support after CAE simulation optimization, to realize structure lightweight, strength promotion and installation convenience.

[0007] In view of the above technical problems, an embodiment of the utility model provides a kind of lightweight support structure of hydrogen storage system based on CAE simulation optimization, including the load-bearing frame for installing hydrogen bottle, automobile frame left longitudinal beam, automobile frame right longitudinal beam and fixed support, the first connecting frame is connected in the automobile frame left longitudinal beam the bottom of load-bearing frame, the second connecting frame is connected in the automobile frame right longitudinal beam the bottom of load-bearing frame;The automobile frame left longitudinal beam and the automobile frame right longitudinal beam are parallel and spaced arrangement;

[0008] Two groups of fixed supports are arranged between the automobile frame left longitudinal beam and the first connecting frame, and between the automobile frame right longitudinal beam and the second connecting frame, to connect the load-bearing frame, automobile frame left longitudinal beam and automobile frame right longitudinal beam into lightweight support structure.

[0009] Optionally, the fixed support includes first rib plate, second rib plate, third rib plate and bottom plate, the first rib plate and second rib plate are connected to the opposite ends of the bottom plate, and the third rib plate is connected to the middle part of the bottom plate.

[0010] The area between the first rib plate and the third rib plate constitutes a first fixed mounting area, and the area between the second rib plate and the third rib plate constitutes a second fixed mounting area.

[0011] The first connecting frame and the second connecting frame are welded with the upper part of the bottom plate, and the automobile frame left longitudinal beam and the automobile frame right longitudinal beam are detachably connected with the lower part of the bottom plate.

[0012] Optionally, a first mounting circular hole, a second mounting circular hole and a third mounting circular hole are formed on the first fixed mounting area, and a fourth mounting circular hole, a fifth mounting circular hole and a sixth mounting circular hole are arranged on the second fixed mounting area.

[0013] The first mounting circular hole and the fourth mounting circular hole are arranged about the third rib plate, and the second mounting circular hole and the fifth mounting circular hole are arranged about the third rib plate.

[0014] The third mounting circular hole and the sixth mounting circular hole are arranged about the third rib plate.

[0015] Optionally, a first welding edge is arranged on the first fixed mounting area, a second welding edge is arranged on the second fixed mounting area, a third welding edge is arranged on the upper top wall of the bottom plate, and a welding ring is arranged on the hole wall ring of the first mounting round hole and the hole wall ring of the fourth mounting round hole;

[0016] The first connecting frame and the second connecting frame are welded between the upper part of the bottom plate and the first welding edge, the second welding edge, the third welding edge, and the welding ring.

[0017] Optionally, the fastener includes a plurality of bolts and a plurality of nuts, and the plurality of bolts are arranged in the second mounting round hole, the third mounting round hole, the fifth mounting round hole, the sixth mounting round hole, and the screw hole.

[0018] The plurality of bolts are arranged in the second mounting round hole, the third mounting round hole, the fifth mounting round hole, the sixth mounting round hole, and the screw hole, and the bolts are matched to achieve detachable connection of the automobile frame left longitudinal beam and the automobile frame right longitudinal beam with the lower part of the bottom plate.

[0019] Optionally, the bottom plate has a preset thickness of 9-10 mm, a preset width of 160-180 mm, and a preset length of 200-250 mm, and the first rib plate, the second rib plate, and the third rib plate have a preset thickness of 7-8 mm.

[0020] Optionally, the distance L1 between the centers of the first mounting round hole and the fourth mounting round hole in the transverse direction is 80-90 mm.

[0021] The distance L2 between the centers of the third mounting round hole and the sixth mounting round hole in the transverse direction is 100-110 mm.

[0022] The distance L3 between the centers of the fourth mounting round hole and the fifth mounting round hole in the vertical direction is 80-110 mm.

[0023] The distance L4 between the centers of the second mounting round hole and the third mounting round hole in the vertical direction is 100-110 mm.

[0024] The distance L4 between the outer ring of the first mounting round hole and the fourth mounting round hole and the two ends of the bottom plate is 5-10 mm.

[0025] Optionally, the top end width W of the first rib plate, the second rib plate, and the third rib plate is 20-40 mm.

[0026] The utility model discloses, through the traditional split type double support structure is innovatively integrated as integrated whole support, has reduced the quantity of parts fundamentally, has simplified the structure form to effective reduction of processing manufacturing cost. Meanwhile, the design of fixed support makes the connecting mode between support structure and the load carrier of hydrogen storage system and the longitudinal beam of car frame more simple and efficient, only needs to weld and fix the upper portion of support and load carrier, and the lower portion is connected with the car frame through bolt and can complete the assembly, greatly reduces the cumbersome procedure of aligning connection of installing two supports respectively in the traditional scheme, obviously reduces the size cumulative error of step -by -step assembly, improves the installation accuracy and assembly efficiency.

[0027] In the utility model, based on CAE simulation optimization technology, fine topology analysis and multi-objective optimization design are carried out to the support structure, under the premise of guaranteeing to meet the requirements of dynamic impact, static thrust and vibration test and other severe working conditions stipulated in the standard, optimal configuration of material distribution is realized. Compared with the traditional support, the structural strength and carrying capacity of the new support are obviously improved, and the reliability is significantly enhanced under the same material consumption. At the same time, by accurately removing the structural redundancy and unnecessary material area, the overall weight of the support is effectively controlled, and the weight is greatly reduced, better meeting the lightweight demand of new energy vehicles. The utility model forms a three-dimensional composite welding interface with multiple points, significantly increases the effective welding area and contact position, uniformly disperses the connecting stress to each welding area, avoids the interface cracking or fatigue failure caused by stress concentration under dynamic load in the traditional single plane weld, and ensures the integrity, rigidity and shear resistance between the load carrier of hydrogen storage system and the support. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is the whole structure schematic view of the hydrogen storage system lightweight support structure based on CAE simulation optimization in an embodiment of the utility model;

[0030] Figure 2 It is the installation structure schematic view of the fixed support in an embodiment of the utility model;

[0031] Figure 3 It is the whole structure schematic view of the fixed support in an embodiment of the utility model;

[0032] Figure 4 It is the plan view of the fixed support in an embodiment of the utility model.

[0033] Figure 5 is the design parameter schematic view of the fixed support in an embodiment of the utility model;

[0034] Figure 6 is the side view of the fixed support in an embodiment of the utility model.

[0035] The reference signs in the description are as follows:

[0036] 1-bearer frame, 11-first connecting frame, 12-second connecting frame, 2-automobile frame left longitudinal beam, 3-automobile frame right longitudinal beam, 31-screw hole, 4-fixed support, 41-first rib plate, 411-first welding edge, 42-second rib plate, 421-second welding edge, 43-third rib plate, 431-third welding edge, 44-bottom plate, 5-first mounting round hole, 51-welding ring, 6-second mounting round hole, 7-third mounting round hole, 8-fourth mounting round hole, 9-fifth mounting round hole, 10-sixth mounting round hole. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly understood, the utility model is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0038] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] As Figures 1 to 6As shown, the utility model embodiment provides a hydrogen storage system lightweight support structure based on CAE simulation optimization, including the load bearing frame 1 for installing hydrogen bottle, car frame left side member 2, car frame right side member 3 and fixed support 4, car frame left side member 2 is connected in first connecting frame 11 of load bearing frame 1 bottom, car frame right side member 3 is connected in second connecting frame 12 of load bearing frame 1 bottom, car frame left side member 2 and car frame right side member 3 are parallel and interval arrangement.

[0041] Two groups of fixed supports 4 are arranged between the car frame left side member 2 and the first connecting frame 11, and between the car frame right side member 3 and the second connecting frame 12, to connect the load bearing frame 1, car frame left side member 2 and car frame right side member 3 into a lightweight support structure.

[0042] Understandably, the hydrogen storage system lightweight support structure based on CAE simulation optimization realizes the lightweight integration of the load bearing frame 1 and the car frame by reasonably arranging the connection between the car frame left side member 2, right side member and the load bearing frame 1, and using four fixed supports 4 for stable connection. This structure not only effectively disperses the dynamic load during vehicle operation, improves the strength and reliability of the overall structure, but also reduces the weight of the support through optimized design and material selection, helps to reduce the overall energy consumption, and improves the performance and economy of hydrogen fuel cell vehicles.

[0043] Further, the hydrogen storage system lightweight support structure based on CAE simulation optimization is analyzed by CAE simulation to ensure that its structural strength meets the dynamic impact, static thrust and vibration test requirements in GB / T26990-2023 standard. Steel is the preferred material, and aluminum is not recommended. The specific parameters are as follows: the support thickness is designed based on the yield strength of 450MPa grade steel; when the material strength is improved to 650MPa grade, the thickness can be correspondingly thinned. The support thickness is allowed to decrease by 1.5mm for every 350MPa increase in material yield strength. Materials with a yield strength lower than 450MPa are not within the selection range. In this way, the weight of the hydrogen storage system lightweight support structure based on CAE simulation optimization can be significantly reduced under the condition of meeting the regulations.

[0044] In an embodiment, as shown in Figures 2 to 3 The fixed support 4 includes a first rib plate 41, a second rib plate 42, a third rib plate 43 and a bottom plate 44, the first rib plate 41 and the second rib plate 42 are connected to opposite ends of the bottom plate 44, and the third rib plate 43 is connected to the middle part of the bottom plate 44.

[0045] The area between the first rib plate 41 and the third rib plate 43 constitutes a first fixed mounting area, and the area between the second rib plate 42 and the third rib plate 43 constitutes a second fixed mounting area.

[0046] The first connecting frame 11 and the second connecting frame 12 are welded with the upper part of the bottom plate 44; the left longitudinal beam 2 and the right longitudinal beam 3 of the automobile frame are detachably connected with the lower part of the bottom plate 44.

[0047] Understandably, the fixed support 4 adopts a symmetrical integrated structure composed of a bottom plate 44 and three rib plates, which are arranged at both ends of the bottom plate 44 through the first rib plate 41 and the second rib plate 42, and the third rib plate 43 is arranged in the middle, forming two independent and symmetrical fixed mounting areas. This configuration significantly improves the overall stiffness and deformation resistance of the support, optimizes the load transmission path and stress distribution uniformity; the upper part of the bottom plate 44 is welded with the connecting frame, and the lower part can be detachably connected with the longitudinal beam of the frame by bolts. This layered connection method ensures the stability and integrity of the connection between the hydrogen storage system and the support while achieving convenient assembly with the frame, taking into account the structural reliability and maintenance convenience.

[0048] In an embodiment, as shown in Figure 3 The first fixed mounting area is provided with a first mounting circular hole 5, a second mounting circular hole 6 and a third mounting circular hole 7; the second fixed mounting area is provided with a fourth mounting circular hole 8, a fifth mounting circular hole 9 and a sixth mounting circular hole 10.

[0049] The first mounting circular hole 5 and the fourth mounting circular hole 8 are arranged about the third rib plate 43; the second mounting circular hole 6 and the fifth mounting circular hole 9 are arranged about the third rib plate 43.

[0050] The third mounting circular hole 7 and the sixth mounting circular hole 10 are arranged about the third rib plate 43.

[0051] Understandably, two fixed mounting areas are each provided with three mounting circular holes, and the hole positions are symmetrically arranged about the third rib plate 43, forming a symmetrical configuration of double areas and six holes. This design disperses the connection stress through multiple hole positions, realizes balanced load transmission and uniform stress distribution, and significantly improves the connection reliability and structural stability of the bearing frame 1 and the longitudinal beam of the frame; the symmetrical layout not only facilitates quick positioning and accurate alignment during assembly, reducing installation deviation, but also enhances the universality and interchangeability of structural parts. At the same time, through CAE simulation optimization of the opening position and quantity, the overall weight of the support is effectively reduced under the premise of ensuring the connection strength, realizing the coordination and unity of functionality and light weight.

[0052] In an embodiment, as shown in Figure 4As shown, the first fixed mounting area is provided with a first welding edge 411, the second fixed mounting area is provided with a second welding edge 421, and the upper top wall of the bottom plate 44 is provided with a third welding edge 431. The hole wall ring of the first mounting round hole 5 and the hole wall ring of the fourth mounting round hole 8 are both provided with a welding ring 51.

[0053] The first connecting frame 11 and the second connecting frame 12 are both welded between the upper part of the bottom plate 44 through the first welding edge 411, the second welding edge 421, the third welding edge 431, and the welding ring 51.

[0054] Understandably, this structure sets the first welding edge 411, the second welding edge 421, the third welding edge 431, and the welding ring 51 of the two mounting areas of the mounting round hole on the support, forms a multi-point composite welding connection interface, significantly increases the effective welding area and contact position between the first connecting frame 11 and the second connecting frame 12 and the fixed support 4, and expands the welding seam distribution from the traditional single plane connection to multiple dimensions of the rib plate side edge, the top surface of the bottom plate 44, and the hole wall ring. This three-dimensional welding layout not only uniformly disperses the connection stress to each welding area to avoid welding seam cracking or fatigue failure caused by stress concentration, but also fully utilizes the opening space through the design of the round hole hole wall welding ring 51 to form a circumferential constraint, greatly improves the connection rigidity, integrity, and shear resistance between the automobile frame and the load-bearing frame 1 structure of the hydrogen storage system.

[0055] In an embodiment, as shown in Figure 4 The hydrogen storage system lightweight support structure based on CAE simulation optimization further includes fasteners (not shown in the figure), which include a plurality of bolts and a plurality of nuts. The automobile frame left side beam 2 and the automobile frame right side beam 3 are both provided with a plurality of screw holes 31.

[0056] The plurality of bolts are respectively arranged in the second mounting round hole 6, the third mounting round hole 7, the fifth mounting round hole 9, the sixth mounting round hole 10, and the screw hole 31, and cooperate with the bolts to realize the detachable connection between the automobile frame left side beam 2 and the automobile frame right side beam 3 and the lower part of the bottom plate 44.

[0057] Understandably, this structure fastens the second mounting round hole 6, the third mounting round hole 7, the fifth mounting round hole 9, the sixth mounting round hole 10 of the lower part of the support bottom plate 44 and the screw hole 31 on the frame side beam through the bolts, forms a four-point positioning detachable mechanical connection, and guarantees the connection strength and shear stability between the automobile frame and the load-bearing frame 1.

[0058] In an embodiment, as shown in Figure 5As shown, the preset thickness of the bottom plate 44 is 9-10 mm; the preset width of the bottom plate 44 is 160-180 mm; the preset length of the bottom plate 44 is 200-250 mm; and the preset thickness of the first rib plate 41, the second rib plate 42 and the third rib plate 43 is 7-8 mm.

[0059] In an embodiment, as shown in FIG. 2, the first mounting circular hole 5 and the fourth mounting circular hole 8 are arranged in a transverse direction. Figure 5 As shown, the distance L1 between the centers of the first mounting circular hole 5 and the fourth mounting circular hole 8 in the transverse direction is 80-90 mm.

[0060] The distance L2 between the centers of the third mounting circular hole 7 and the sixth mounting circular hole 10 in the transverse direction is 100-110 mm.

[0061] The distance L3 between the center of the fourth mounting circular hole 8 and the center of the fifth mounting circular hole 9 in the vertical direction is 80-110 mm.

[0062] The distance L4 between the center of the second mounting circular hole 6 and the center of the third mounting circular hole 7 in the vertical direction is 100-110 mm.

[0063] The distance L4 between the outer circle of the first mounting circular hole 5 and the fourth mounting circular hole 8 and the two ends of the bottom plate 44 is 5-10 mm.

[0064] In an embodiment, as shown in FIG. 2, the first rib plate 41, the second rib plate 42 and the third rib plate 43 are arranged in a vertical direction. Figure 6 As shown, the top end width W of the first rib plate 41, the second rib plate 42 and the third rib plate 43 is 20-40 mm.

[0065] Understandably, the above parameters are all obtained after CAE simulation optimization, which has the following effects: first, the thickness, width and length parameters of the bottom plate 44 and the three rib plates are accurately calculated to ensure that the fixed support 4 meets the structural strength requirement while achieving the lightweight target, effectively solving the problem of excessive weight of the traditional support; second, the spacing parameters between the several mounting circular holes are optimized to make the connection between the fixed support 4 and the frame and the carrier 1 more stable and reliable, reducing the risk of stress concentration and fatigue failure; finally, the reasonable design of the top end width of the three rib plates further enhances the overall rigidity and stability of the support, and the comprehensive effect of these parameters significantly improves the performance and safety of the hydrogen storage system support.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A hydrogen storage system lightweight support structure based on CAE simulation optimization, characterized in that, The application relates to a light-weighted support structure for mounting a hydrogen cylinder, which comprises a carrying frame (1), a left longitudinal beam (2) of a vehicle frame, a right longitudinal beam (3) of the vehicle frame and fixing supports (4), the left longitudinal beam (2) of the vehicle frame is connected to a first connecting frame (11) at the bottom of the carrying frame (1), and the right longitudinal beam (3) of the vehicle frame is connected to a second connecting frame (12) at the bottom of the carrying frame (1); the left longitudinal beam (2) of the vehicle frame and the right longitudinal beam (3) of the vehicle frame are arranged in parallel and at intervals. Two groups of the fixing supports (4) are arranged between the left longitudinal beam (2) of the vehicle frame and the first connecting frame (11) and between the right longitudinal beam (3) of the vehicle frame and the second connecting frame (12) so as to connect the carrying frame (1), the left longitudinal beam (2) of the vehicle frame and the right longitudinal beam (3) of the vehicle frame into the light-weighted support structure.

2. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 1, wherein, The fixing support (4) comprises a first rib plate (41), a second rib plate (42), a third rib plate (43) and a bottom plate (44), the first rib plate (41) and the second rib plate (42) are connected to opposite ends of the bottom plate (44), and the third rib plate (43) is connected to the middle part of the bottom plate (44). The region between the first rib plate (41) and the third rib plate (43) constitutes a first fixed mounting area, and the region between the second rib plate (42) and the third rib plate (43) constitutes a second fixed mounting area. The first connecting frame (11) and the second connecting frame (12) are welded with the upper part of the bottom plate (44), and the left longitudinal beam (2) of the vehicle frame and the right longitudinal beam (3) of the vehicle frame are detachably connected with the lower part of the bottom plate (44).

3. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 2, wherein, First mounting circular holes (5), second mounting circular holes (6) and third mounting circular holes (7) are arranged on the first fixed mounting area, and fourth mounting circular holes (8), fifth mounting circular holes (9) and sixth mounting circular holes (10) are arranged on the second fixed mounting area. The first mounting circular hole (5) and the fourth mounting circular hole (8) are arranged in a stack mode about the third rib plate (43), the second mounting circular hole (6) and the fifth mounting circular hole (9) are arranged in a stack mode about the third rib plate (43), and the third mounting circular hole (7) and the sixth mounting circular hole (10) are arranged in a stack mode about the third rib plate (43). A first welding edge (411) is arranged on the first fixed mounting area, a second welding edge (421) is arranged on the second fixed mounting area, a third welding edge (431) is arranged on the upper top wall of the bottom plate (44), and welding rings (51) are arranged on the hole wall rings of the first mounting circular hole (5) and the fourth mounting circular hole (8).

4. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 3, wherein, The first connecting frame (11) and the second connecting frame (12) are welded with the upper part of the bottom plate (44) through the first welding edge (411), the second welding edge (421), the third welding edge (431) and the welding rings (51). The application further comprises fasteners, the fasteners comprise a plurality of bolts and a plurality of nuts, and a plurality of screw holes (31) are arranged on the left longitudinal beam (2) of the vehicle frame and the right longitudinal beam (3) of the vehicle frame.

5. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 3, wherein, ​ The plurality of bolts are respectively arranged in the second mounting circular hole (6), the third mounting circular hole (7), the fifth mounting circular hole (9), the sixth mounting circular hole (10) and the screw hole (31), and the bolts are matched to realize the detachable connection of the left longitudinal beam (2) and the right longitudinal beam (3) of the automobile frame and the lower part of the bottom plate (44).

6. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 2, wherein The preset thickness of the bottom plate (44) is 9-10mm; the preset width of the bottom plate (44) is 160-180mm; the preset length of the bottom plate (44) is 200-250mm; the preset thickness of the first rib plate (41), the second rib plate (42) and the third rib plate (43) is 7-8mm.

7. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 3, wherein, The transverse distance L1 between the centers of the first mounting circular hole (5) and the fourth mounting circular hole (8) is 80-90mm; The transverse distance L2 between the centers of the third mounting circular hole (7) and the sixth mounting circular hole (10) is 100-110mm; The vertical distance L3 between the center of the fourth mounting circular hole (8) and the center of the fifth mounting circular hole (9) is 80-110mm; The vertical distance L4 between the center of the second mounting circular hole (6) and the center of the third mounting circular hole (7) is 100-110mm; The distance L4 between the outer circle of the first mounting circular hole (5) and the fourth mounting circular hole (8) and the two ends of the bottom plate (44) is 5-10mm.

8. The CAE simulation and optimization based hydrogen storage system light-weight support structure according to claim 3, wherein, The top width W of the first rib plate (41), the second rib plate (42) and the third rib plate (43) is 20-40mm.

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