A test platform suitable for ship heavy equipment vibration noise

Abstract

The application discloses a kind of test platforms suitable for ship heavy equipment vibration noise, including foundation, concrete base, cast iron platform, damping component and ground anchor;The damping component is set between foundation and concrete base;The upper end of the concrete base is provided with a plurality of mounting square holes;The ground anchor is placed in the mounting square hole, and the upper end of the ground anchor is fixedly connected with the cast iron platform;Secondary pouring concrete for fixing the ground anchor is poured into the mounting square hole.The application isolates external vibration interference through elastic vibration isolation foundation, optimizes the anchoring structure of ground anchor, improves the installation positioning accuracy and long-term anti-vibration reliability, thereby solving the technical problems that the existing test platform is easily disturbed by external vibration, the installation positioning accuracy of ground anchor is low, and the anchoring reliability is insufficient under long-term vibration.

Description

Technical Field

[0001] This invention relates to the field of testing technology for heavy marine equipment, and in particular to a testing platform suitable for vibration and noise testing of heavy marine equipment. Background Technology

[0002] As ships develop towards low-noise and stealth designs, the requirements for vibration and noise control of ship equipment are constantly increasing. Vibration reduction and noise reduction design needs to be carried out during the equipment development phase, and after development, vibration and noise testing is required to verify whether the equipment meets the performance requirements.

[0003] Existing technology discloses a height-adjustable vibration test platform, which consists of a vibration motor, four springs, an upper plate, a lower plate, and a lifting mechanism. The upper and lower plates are arranged in parallel, the vibration motor is fixed to the middle of the lower end face of the upper plate, and the springs and lifting mechanism are arranged between the two plates. This solution has a simple structure and low cost, but it has obvious shortcomings in practical applications:

[0004] With limited vibration isolation capabilities, it cannot effectively isolate environmental vibrations generated by surrounding equipment in the workshop. External vibrations are easily transmitted to the test platform, interfering with the vibration and noise test results of heavy marine equipment, and the accuracy of the data is difficult to guarantee.

[0005] Therefore, it is necessary to design a testing platform suitable for vibration and noise of heavy ship equipment to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a testing platform suitable for vibration and noise of heavy marine equipment. This invention isolates external vibration interference through an elastic vibration isolation foundation, while optimizing the ground anchor structure to improve installation positioning accuracy and long-term vibration resistance reliability. This solves the technical problems of existing testing platforms being susceptible to external vibration interference, having low ground anchor installation positioning accuracy, and insufficient anchoring reliability under long-term vibration.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A testing platform for vibration and noise of heavy marine equipment includes a foundation, a concrete base, a cast iron platform, vibration damping components, and ground anchors.

[0009] The vibration damping component is disposed between the foundation and the concrete base;

[0010] The upper end of the concrete base is provided with multiple square holes for installation;

[0011] The ground anchor is placed in the installation square hole, and the upper end of the ground anchor is fixedly connected to the cast iron platform.

[0012] The installation square hole is filled with secondary concrete for fixing the ground anchor.

[0013] In some possible implementations, the vibration damping assembly includes an embedded part, a vibration damper body, and bolts;

[0014] The two embedded parts are respectively embedded in the adjacent sides of the foundation and the concrete base, and the vibration damper body is disposed between the two embedded parts. The vibration damper body is fixedly connected to the two embedded parts by multiple bolts.

[0015] In some possible implementations, the vibration damping assembly further includes an adjustment shim with two rectangular openings.

[0016] The adjusting shim is positioned between the upper embedded part and the damper body, and the bolt passes through the corresponding rectangular opening.

[0017] In some possible implementations, the upper end of the cast iron platform is provided with a cover plate, and the ground anchor is conical in shape, narrower at the top and wider at the bottom, with the cover plate covering the upper end of the cast iron platform.

[0018] According to a second aspect of this disclosure, a testing platform for vibration and noise of heavy marine equipment is provided, further comprising a ground anchor assembly located between a cast iron platform and a concrete base. The ground anchor assembly includes a column fixedly connected to the lower end of the cast iron platform, a square plate fixedly connected to the lower end of the column, a retaining arc block fixedly connected to the bottom of a mounting square hole, and a tensioning and expansion mechanism sleeved on the outside of the column. The lower half of the square plate and the column are located within the mounting square hole, and the square plate has a through hole adapted to the retaining arc block. When the column moves downward, the tensioning and expansion mechanism is pushed against by the retaining arc block and opens to press against the side wall of the mounting square hole.

[0019] In some possible implementations, the tensioning and expansion mechanism includes sliding rings, connecting rods, pins, abutments, slide rails, sliders, and springs; two sliding rings are slidably sleeved on the outside of the column; one end of each of the multiple connecting rods is rotatably connected to the outside of the corresponding sliding ring, and two corresponding connecting rods are arranged crosswise with their intersection points rotatably connected by pins; four sets of abutments are disposed on the outside of the column, the slide rails are fixedly connected to the abutments, two sliders are slidably connected to the slide rails, adjacent sides of two sliders are elastically connected by springs, and the other end of each connecting rod is rotatably connected to the corresponding slider.

[0020] In some possible implementations, the ground anchor assembly further includes a guide groove and a guide block; the guide groove is formed on the outside of the column, the guide block is fixedly connected to the inner wall of the sliding ring, and the guide block is slidably connected in the corresponding guide groove.

[0021] In some possible implementations, the ground anchor assembly further includes a meshing groove and a triangular groove; the meshing groove is formed on the upper and lower sides of the square plate, and the triangular groove is formed on the inner bottom of the mounting square hole with two symmetrical inclined surfaces at its inner bottom; the positions of the multiple triangular grooves correspond one-to-one with the positions of the meshing grooves located below; the secondary poured concrete fills the area between the triangular grooves and the meshing grooves.

[0022] In some possible implementations, the ground anchor assembly further includes a trapezoidal groove and a protrusion; the trapezoidal groove is formed on the side of the abutment away from the column, the protrusion is fixedly connected to the inner wall of the mounting square hole and adapted to the trapezoidal groove, a gap is left between the protrusion and the inner wall of the trapezoidal groove, and the secondary poured concrete fills the gap.

[0023] The present invention has the following beneficial effects:

[0024] 1. Compared with existing technologies, the vibration damping components between the foundation and the concrete base, together with the large-mass concrete base and the cast iron platform, form an elastic vibration isolation system. This not only blocks the interference of external environmental vibrations on the tested equipment, but also prevents the vibration of the test equipment from being transmitted outward, thus significantly improving the accuracy of vibration and noise test data of heavy ship equipment.

[0025] 2. Compared with existing technologies, the use of a conical ground anchor with a narrow top and a wide bottom, combined with an inverted conical installation square hole and a secondary grouting process, is a mature engineering solution with low construction difficulty and controllable cost, which can meet the testing and anchoring requirements of conventional ship heavy equipment.

[0026] 3. Compared with existing technologies, the sliding tensioning and expansion mechanism automatically triggers radial expansion by utilizing the axial displacement of the ground anchor assembly during its lowering. This eliminates the need for additional operating space and tightening procedures, making it suitable for the overall hoisting process of cast iron platforms. The synchronous expansion of the four supporting plates enables automatic centering, effectively improving the positioning accuracy of the ground anchor installation and reducing the workload of subsequent platform leveling.

[0027] 4. Compared with existing technologies, the multi-directional interlocking design of the trapezoidal groove of the abutment plate and the protrusion of the hole wall, the meshing groove of the square plate and the triangular groove of the bottom of the hole, combined with the secondary pouring of concrete to form a mechanical tenon and mortise structure, significantly improves the axial pull-out resistance, radial shear resistance and vibration fatigue resistance compared with pure bonding anchoring. It can maintain the platform plane accuracy for a long time and ensure the long-term stability of the test benchmark.

[0028] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a test platform for vibration and noise of heavy ship equipment proposed in this invention;

[0030] Figure 2 This is a schematic diagram of the structure of the adjusting shim;

[0031] Figure 3 This is a schematic diagram of the vibration damper.

[0032] Figure 4 A schematic diagram of the structure where the vibration damper body is installed on the foundation;

[0033] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0034] Figure 6 This is a schematic diagram of the ground anchor assembly.

[0035] Figure 7 This is a schematic diagram of the structure at the bottom of the mounting square hole;

[0036] Figure 8 This is a diagram showing the assembly of the support plate and the protrusion.

[0037] In the diagram: 101 Foundation, 102 Concrete base, 103 Cast iron platform, 104 Cover plate, 201 Ground anchor, 202 Mounting square hole, 301 Adjusting shim, 302 Rectangular opening, 401 Vibration damper body, 402 Bolt, 403 Embedded part, 501 Column, 502 Abutment plate, 503 Slide rail, 504 Slider, 505 Spring, 506 Connecting rod, 507 Pin, 508 Sliding ring, 509 Abutment arc block, 510 Square plate, 601 Guide groove, 602 Guide block, 701 Trapezoidal groove, 702 Protrusion, 801 Engaging groove, 802 Triangular groove. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] Example 1

[0040] Reference Figures 1-2 A test platform for vibration and noise of heavy marine equipment is disclosed. The test platform consists of a foundation 101, a concrete base 102, a cast iron platform 103, vibration damping components, and ground anchors 201. The vibration damping components are set between the foundation 101 and the concrete base 102 to form an elastic vibration isolation foundation. The cast iron platform 103 is anchored above the concrete base 102 by the ground anchors 201. The cast iron platform 103 is 2m long, 2m wide, and 0.35m high, and is made of HT250. Its working surface is perforated to meet the fixing requirements of any test equipment. The concrete base platform 102 is 2m long, 2m wide, and 0.7m high. The number of vibration damping components is not less than 4, and they are distributed in a ring array around the axis of the foundation 101.

[0041] Traditional vibration isolation platforms often use the installation method of directly placing vibration isolators. There is no reliable anchoring interface between the vibration isolators and the foundation. Under long-term heavy load vibration, the position is prone to displacement. Moreover, leveling requires lifting the entire mass block, which makes construction difficult and precision control poor. At the same time, ordinary installation interfaces cannot be adapted to the construction requirements of large-volume concrete pouring, and embedded parts are prone to bonding failure and thread holes being blocked by grout.

[0042] In some embodiments of this disclosure, a vibration damping component is provided. By integrally casting the embedded part with the concrete, the upper and lower ends of the vibration isolation system are firmly connected to the foundation 101 and the concrete base 102, avoiding relative slippage under vibration conditions and ensuring long-term stability of vibration isolation performance. The adjusting shim 301 adopts a slotted structure, which can increase or decrease the number and position of the shims without disassembling the connecting bolts 402, so as to conveniently adjust the overall level of the concrete base and ultimately control the level of the platform within 5mm. The non-installation surface of the embedded part 403 retains a rough surface, and the threaded hole is sealed with grout, which not only improves the bonding strength with the concrete, but also avoids the problem of grout clogging the threaded hole during the casting process.

[0043] Specifically, the vibration damping assembly includes two sets of embedded parts 403, a vibration damper body 401, and multiple sets of bolts 402. The two embedded parts 403 are respectively embedded and fixed at corresponding positions on the top surface of the foundation 101 and the bottom surface of the concrete base 102. The vibration damper body 401 is clamped between the two sets of embedded parts 403 and is fastened to the upper and lower embedded parts 403 by multiple bolts 402. An adjustment shim 301 with a rectangular opening 302 is also provided between the upper embedded part 403 and the vibration damper body 401. The connecting bolts 402 pass through the rectangular opening 302 to complete the assembly. The vibration damper body 401 adopts a DY type low-frequency rubber vibration isolator.

[0044] Conventional straight-hole grouting anchors rely solely on concrete bonding force for anchoring. Under long-term alternating vibration loads on heavy ship equipment, fatigue debonding and microcrack propagation can easily occur at the bonding interface, ultimately leading to anchor loosening and platform accuracy drift, failing to meet the long-term stability requirements of high-precision vibration and noise testing.

[0045] In some embodiments of this disclosure, reference is made to Figure 1 The ground anchor 201 utilizes an inverted cone structure that is smaller at the top and larger at the bottom. After secondary grouting and curing, it forms a mechanical inverted wedge anchoring effect, and its axial pull-out resistance is significantly higher than that of the straight hole bonded structure. When the ground anchor is subjected to upward vibration tension, the compressive force between the inverted cone surface and the concrete increases synchronously with the increase of tension, which has anti-vibration self-locking characteristics. It can effectively reduce the risk of loosening under long-term vibration. In conjunction with the cover plate to seal the hole position, it ensures the flatness and integrity of the working surface of the cast iron platform.

[0046] Specifically, the ground anchor 201 is generally conical in shape, narrower at the top and wider at the bottom, with its upper end fixedly connected to the bottom of the cast iron platform 103; the upper end of the concrete base 102 is provided with an inverted conical installation square hole 202, which is smaller at the top and larger at the bottom, and the lower end of the ground anchor 201 extends into the installation square hole 202, which is filled with secondary poured concrete; the upper end of the cast iron platform 103 is covered with a cover plate 104 to seal the installation hole.

[0047] The functional principle of this invention can be explained through the following operational methods:

[0048] Before pouring the foundation 101, embed the lower embedded part 403 according to the design position, with the top surface of the embedded part 10mm higher than the foundation. After the foundation concrete has cured to the design strength, install the vibration damper body 401 and the adjusting shim 301 to make preliminary leveling.

[0049] The formwork for the concrete base 102 is erected, and the upper embedded part 403 is pre-embedded. The bottom surface of the embedded part protrudes 10mm from the lower surface of the concrete. At the same time, a corresponding number of inverted conical installation square holes 202 are reserved on the top surface. The concrete is poured continuously in one go and cured to the required standard.

[0050] The ground anchor 201 is pre-assembled on the bottom of the cast iron platform 103 and hoisted as a whole to the concrete base 102 so that the ground anchor 201 falls into the installation square hole 202; the level of the cast iron platform 103 is roughly adjusted by adjusting the leveling shims to fix the position of the ground anchor.

[0051] Secondary grouting is performed into the installation square hole 202. After the grout has completely cured, the plane accuracy of the cast iron platform 103 is precisely adjusted by the ground anchor 201. Once the target is met, the ground anchor bolts are tightened, and the cover plate 104 is put on to complete the installation.

[0052] During testing, the ship's heavy equipment is fixed to the working surface of the cast iron platform 103. The elastic vibration isolation system, consisting of the bottom vibration damping components and the large-mass concrete base 102, can effectively attenuate the environmental vibration transmitted from the outside and ensure the accuracy of the test data.

[0053] Example 2

[0054] Traditional ground anchors, when hoisted and positioned as a whole with the platform, lack a radial positioning structure, making them prone to offset and tilting, resulting in poor installation alignment accuracy. Furthermore, the tightening operation of ground anchors requires additional operating space and tightening procedures, while the space under the cast iron platform is narrow, making construction operations difficult and unsuitable for the installation process of hoisting heavy-duty platforms as a whole.

[0055] In some embodiments of this disclosure, reference is made to Figures 5-6Equipped with a ground anchor assembly, the axial displacement of the platform during its lowering triggers a tightening action. When the ground anchor is lowered along with the cast iron platform, the abutting arc block 509 passes through the square plate 510 and pushes the lower sliding ring 508 upward, reducing the distance between the two sliding rings 508. Through the scissor drive of the cross link 506, the surrounding abutment plates 502 are pushed to expand radially outward in sync, automatically pressing the four inner walls of the installation square hole to achieve automatic centering and pre-positioning. No additional operating tools or working space are required throughout the process, perfectly adapting to the overall hoisting construction process of the cast iron platform. The elastic deformation of the spring 505 can also compensate for the construction dimensional tolerances of the square hole, ensuring that the tightening force of each set of abutment plates is uniform and consistent.

[0056] Specifically, the ground anchor assembly includes a column 501, a square plate 510, an abutting arc block 509, and a tensioning and expansion mechanism. The upper end of the column 501 is fixed to the lower end face of the cast iron platform 103, the square plate 510 is fixed to the lower end of the column 501, and the abutting arc block 509 is fixed to the inner bottom of the mounting square hole 202. The square plate 510 has a through hole for the abutting arc block 509 to pass through. The tensioning and expansion mechanism is sleeved on the outside of the column 501 and consists of two sliding rings 508 and multiple sets of cross-connected... The system consists of a rod 506, a pin 507, four sets of abutments 502, a slide rail 503, a slider 504, and a spring 505. Two sliding rings 508 are slidably mounted on the column 501. Each set of two connecting rods 506 are arranged crosswise, and the intersection point is hinged through the pin 507. The two ends of the connecting rods are respectively hinged to the sliding rings 508 and the sliders 504. The sliders 504 are slidably mounted on the slide rails 503 inside the abutments 502. The upper and lower sliders 504 are elastically connected by springs 505.

[0057] When the sliding ring 508 slides along the cylindrical rod, it is prone to circumferential deflection, which in turn causes the connecting rod 506 and the abutment plate 502 to shift and misalign. This results in the abutment plate 502 being unable to be aligned with the inner wall of the square hole, affecting the tightening effect and centering accuracy. Under long-term vibration, structural jamming failure may also occur.

[0058] In some embodiments of this disclosure, reference is made to Figure 6 The present invention, through the cooperation of guide block 602 and guide groove 601, strictly restricts the circumferential rotational freedom of sliding ring 508, while retaining the axial sliding freedom, ensuring that sliding ring 508 rises and falls smoothly along the axial direction of column 501, ensuring that the transmission angle of connecting rod 506 and the expansion direction of abutment plate 502 always accurately correspond to the inner wall of square hole, avoiding deflection and jamming, and improving the operational stability and positioning accuracy of expansion mechanism.

[0059] Specifically, the outer wall of the column 501 is provided with a guide groove 601 along the axial direction, and the inner ring wall of the sliding ring 508 is fixed with a guide block 602. The guide block 602 is slidably engaged in the interior of the corresponding guide groove 601 to form a circumferential limiting fit.

[0060] Relying solely on the frictional force of the 502 abutment plate for anchoring has limited radial shear resistance and is prone to relative slippage under lateral vibration loads. Furthermore, after grouting, the abutment plate and concrete are only bonded in a planar manner, and the bonded surface is prone to peeling under vibration fatigue, resulting in insufficient anchoring reliability.

[0061] In some embodiments of this disclosure, reference is made to Figure 6 and Figure 8 After the secondary grouting of this invention is cured, the concrete fills the gap between the trapezoidal groove 701 and the protrusion 702, forming a transverse tenon and mortise interlocking structure, which greatly improves the radial shear bearing capacity. When the platform is subjected to transverse vibration impact, the interlocking structure can transmit shear force through mechanical interlocking, rather than simply relying on adhesive force and friction, effectively avoiding transverse slippage under vibration conditions. At the same time, the trapezoidal cross section interlocking structure can also share part of the axial load, further improving the overall anchoring vibration stability.

[0062] Specifically, a trapezoidal groove 701 is provided on the outer wall of the abutment plate 502 away from the column 501, and a trapezoidal protrusion 702 is fixed on the inner wall of the mounting square hole 202. The outer dimensions of the protrusion 702 are smaller than the inner cavity dimensions of the trapezoidal groove 701. After assembly, the protrusion 702 extends into the interior of the trapezoidal groove 701 and a filling gap is left between the inner walls of the two. The gap is filled by secondary pouring of concrete.

[0063] The bottom of the ground anchor is only in planar contact with the bottom of the hole, and the axial pull-out resistance mainly relies on the sidewall anchoring force. There is no additional mechanical interlocking reinforcement at the bottom. Under strong vibration and impact, the axial pull-out redundancy is insufficient, and there is a risk of failure due to overall pull-out.

[0064] In some embodiments of this disclosure, reference is made to Figure 6 and Figure 7 After the grouting of this invention is cured, the concrete in the triangular groove 802 and the meshing groove 801 forms multiple sets of concave and convex interlocking anchoring nodes, which greatly increases the mechanical interlocking area between the bottom of the ground anchor and the concrete. When subjected to axial pull-out force, the inclined surface of the interlocking structure can decompose the pull-out force into multi-directional compressive force, significantly improving the axial pull-out ultimate bearing capacity, while dispersing stress concentration, reducing the probability of fatigue failure under long-term alternating vibration, and further enhancing the long-term anchoring reliability of the ground anchor assembly.

[0065] Specifically, the upper and lower surfaces of the square plate 510 are provided with meshing grooves 801, and the inner bottom of the mounting square hole 202 is provided with multiple sets of triangular grooves 802. The bottom of the triangular grooves 802 forms two symmetrical inclined surfaces, and their positions correspond one-to-one with the meshing grooves 801 on the lower side of the square plate. Secondary concrete is poured to fill the area between the triangular grooves 802 and the meshing grooves 801.

[0066] The functional principle of this embodiment can be explained through the following operation methods:

[0067] When pouring the concrete base 102, a protrusion 702 is prefabricated on the inner wall of the square hole 202, and an abutment arc block 509 is fixedly installed at the bottom of the hole and a triangular groove 802 is prefabricated. The concrete is ready for use after curing.

[0068] Fix the upper end of column 501 to the bottom of cast iron platform 103, pre-assemble square plate 510 and tensioning expansion mechanism, and check that the sliding and tightening actions are smooth.

[0069] The cast iron platform 103 is hoisted as a whole and slowly lowered. The column 501 drives the tensioning and expansion mechanism to extend into the installation square hole 202. After the lower sliding ring 508 contacts the abutting arc block 509, it is pushed upward. The distance between the two sliding rings decreases. Through the cross connecting rod 506, the surrounding abutment plates 502 are pushed to expand outward in sync, automatically centering and pressing the inner wall of the installation square hole 202 to complete the pre-positioning.

[0070] After adjusting the cast iron platform 103 to the designed horizontal accuracy through the leveling mechanism, secondary concrete is poured into the installation square hole 202 to fill the gap between the plate and the hole wall, the gap between the trapezoidal groove 701 and the protrusion 702, and the gap between the meshing groove 801 and the triangular groove 802.

[0071] After the grout has cured, the expansion and pre-tightening force and the multi-directional mechanical interlocking force work together to form a stable and reliable anchoring system. Under long-term vibration test conditions, the ground anchor components are not prone to loosening or accuracy drift, and can maintain the planar accuracy of the cast iron platform 103 for a long time, ensuring the stability and accuracy of vibration and noise testing of heavy ship equipment.

[0072] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A testing platform suitable for vibration and noise testing of heavy marine equipment, characterized in that, include: Foundation (101), concrete base (102), cast iron platform (103), vibration damping components and ground anchor (201); The vibration damping component is disposed between the foundation (101) and the concrete base (102); The upper end of the concrete base (102) is provided with a plurality of installation square holes (202). The ground anchor (201) is placed in the mounting square hole (202), and the upper end of the ground anchor (201) is fixedly connected to the cast iron platform (103); The installation square hole (202) is filled with secondary concrete for fixing the ground anchor (201).

2. The testing platform for vibration and noise of heavy marine equipment according to claim 1, characterized in that: The vibration damping assembly includes an embedded part (403), a vibration damper body (401), and a bolt (402). The two embedded parts (403) are respectively embedded on the adjacent sides of the foundation (101) and the concrete base (102). The damper body (401) is set between the two embedded parts (403). The damper body (401) is fixedly connected to the two embedded parts (403) by multiple bolts (402).

3. The testing platform for vibration and noise of heavy marine equipment according to claim 2, characterized in that: The vibration damping assembly also includes an adjustment shim (301), which has two rectangular openings (302). The adjusting shim (301) is disposed between the upper embedded part (403) and the damper body (401), and the bolt (402) passes through the corresponding rectangular opening (302).

4. The testing platform for vibration and noise of heavy marine equipment according to claim 1, characterized in that: The upper end of the cast iron platform (103) is provided with a cover plate (104), and the ground anchor (201) is a cone shape that is narrow at the top and wide at the bottom. The cover plate (104) covers the upper end of the cast iron platform (103).

5. A testing platform for vibration and noise of heavy marine equipment according to claim 1, characterized in that: It also includes a ground anchor assembly located between the cast iron platform (103) and the concrete base (102). The ground anchor assembly includes a column (501) fixedly connected to the lower end of the cast iron platform (103), a square plate (510) fixedly connected to the lower end of the column (501), an abutting arc block (509) fixedly connected to the bottom of the mounting square hole (202), and a tensioning expansion mechanism sleeved on the outside of the column (501). The lower half of the square plate (510) and the column (501) are located in the mounting square hole (202), and the square plate (510) is provided with a through hole that is compatible with the abutting arc block (509); When the column (501) moves down, the tensioning and expansion mechanism is pushed against by the moving arc block (509) and opens and tightens against the side wall of the mounting square hole (202).

6. A testing platform for vibration and noise of heavy marine equipment according to claim 5, characterized in that: The tensioning and expansion mechanism includes a sliding ring (508), a connecting rod (506), a pin (507), a stop plate (502), a slide rail (503), a slider (504), and a spring (505). The two sliding rings (508) are slidably sleeved on the outside of the column (501); One end of each of the multiple connecting rods (506) is rotatably connected to the outside of the corresponding sliding ring (508), and two corresponding connecting rods (506) are arranged crosswise and rotatably connected at the intersection by a pin (507); The four sets of abutment plates (502) are set on the outside of the column (501). The slide rail (503) is fixedly connected to the abutment plate (502). The two sliders (504) are slidably connected to the slide rail (503). The adjacent sides of the two sliders (504) are elastically connected by springs (505). The other end of each connecting rod (506) is rotatably connected to the corresponding slider (504).

7. A testing platform for vibration and noise of heavy marine equipment according to claim 6, characterized in that: The ground anchor assembly also includes a guide groove (601) and a guide block (602). The guide groove (601) is opened on the outside of the column (501), the guide block (602) is fixedly connected to the inner wall of the sliding ring (508), and the guide block (602) is slidably connected in the corresponding guide groove (601).

8. A testing platform for vibration and noise of heavy marine equipment according to claim 5, characterized in that: The ground anchor assembly also includes a meshing groove (801) and a triangular groove (802). The meshing groove (801) is opened on the upper and lower sides of the square plate (510), and the triangular groove (802) is opened on the inner bottom of the mounting square hole (202) and its inner bottom forms two symmetrical inclined surfaces. The positions of the multiple triangular grooves (802) correspond one-to-one with the positions of the meshing grooves (801) located below. The secondary concrete is used to fill the area between the triangular groove (802) and the meshing groove (801).

9. A testing platform for vibration and noise of heavy marine equipment according to claim 6, characterized in that: The ground anchor assembly also includes a trapezoidal groove (701) and a protrusion (702). The trapezoidal groove (701) is opened on the side of the abutment plate (502) away from the column (501). The protrusion (702) is fixedly connected to the inner wall of the mounting square hole (202) and is adapted to the trapezoidal groove (701). A gap is left between the protrusion (702) and the inner wall of the trapezoidal groove (701), and the secondary poured concrete is filled in the gap.

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