A method of strength testing a telescoping trestle system

Abstract

The present application relates to a kind of telescopic boarding bridge system strength test method.Specifically includes the following steps: S1: erecting strength test platform, telescopic boarding bridge is installed on strength test platform;S2: even pasting strain gauge on the load area of telescopic boarding bridge;S3: obtain the state data of telescopic boarding bridge in empty load state;S4: obtain the state data of telescopic boarding bridge in first stage loading;S5: preset safety condition, judge whether the state data of first stage loading meets safety condition, meet then carry out second stage loading processing, obtain the state data of second stage loading;S6: judge whether the state data of second stage loading meets safety condition, meet then determine qualified;The telescopic boarding bridge system strength test method, the strength detection of whole and each core component of telescopic boarding bridge system is realized, to smoothly meet design requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of trestle equipment, in particular to a telescopic trestle system strength test method. BACKGROUND

[0002] With the development of the design and manufacturing capacity of large marine equipment in China, the domestic manufacturing of many large marine equipment has been realized, such as various pile driving ships, floating cranes, drilling platforms, etc. The current mainstream design of semi-submersible support platform still relies on foreign design, and some core equipment still needs to be imported from abroad. The telescopic boarding trestle is one of the very key core supporting components.

[0003] Therefore, it is of great significance to develop the key technology research of the overall design of the telescopic boarding trestle system and to develop a telescopic trestle that can ensure the safe transportation of personnel and can supply the fixed or mobile platform.

[0004] As a research and development project to fill the domestic gap, the strength test is very critical in the entire debugging process of the telescopic boarding trestle system, which can determine the deformation amount of the aluminum alloy truss, the reliability of the base, and whether the entire system meets the design requirements. At present, there is no better strength test method and equipment in China. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a telescopic trestle system strength test method with high safety factor, accuracy, speed and low test cost.

[0006] To solve the above technical problems, the technical scheme of the present application is as follows: a telescopic trestle system strength test method, the innovation point of which is as follows:

[0007] S1: erecting a strength test platform, installing a telescopic boarding trestle on the strength test platform, and erecting a plurality of support cradles for supporting the telescopic boarding trestle;

[0008] S2: uniformly pasting strain gauges on the load area of the telescopic boarding trestle;

[0009] S3: obtaining state data of the telescopic boarding trestle in an unloaded state;

[0010] S4: performing first-stage loading processing at the load area of the telescopic boarding trestle and obtaining state data of the telescopic boarding trestle in the first-stage loading processing in real time, and after a preset time, obtaining state data of the telescopic boarding trestle in the first-stage loading state;

[0011] S5: preset safety condition, judge whether the state data obtained in the first stage loading process of the telescopic boarding bridge and the state data in the first stage loading state satisfy the safety condition, if yes, perform the second stage loading process on the telescopic boarding bridge based on the first stage loading state, and obtain the state data of the telescopic boarding bridge in the second stage loading process in real time, after a preset time, obtain the state data of the telescopic boarding bridge in the second stage loading state;

[0012] S6: based on the safety condition, judge whether the state data obtained in the second stage loading process of the telescopic boarding bridge and the state data in the second stage loading state satisfy the safety condition, if yes, determine that it is a qualified product.

[0013] Further, the telescopic boarding bridge comprises a base, a rotary support assembly, a herringbone frame, an aluminum alloy truss and a landing cone; the herringbone frame is installed on the base through the rotary support assembly, the land side upper end of the aluminum alloy truss is connected with the herringbone frame through the amplitude cylinder, the land side lower end of the aluminum alloy truss is fixed with the herringbone frame through the hinge shaft, and the ship side lower end of the aluminum alloy truss is connected with the landing cone.

[0014] Further, in S2, strain gauges are uniformly pasted on the load area of the telescopic boarding bridge, specifically, strain gauges are uniformly pasted on the aluminum alloy truss, and the strain gauges are used to monitor the load data borne by the aluminum alloy truss in real time.

[0015] Further, in S3, the state data of the telescopic boarding bridge in the empty state is obtained, specifically, when the telescopic boarding bridge is in the empty state, the initial shape data of the base, the rotary support assembly, the herringbone frame, the aluminum alloy truss and the landing cone is obtained.

[0016] Further, in S4, the first stage loading process is performed at the load area of the telescopic boarding bridge, specifically, load weight units are uniformly laid on the aluminum alloy truss with uniformly pasted strain gauges, the load value of the first stage loading process is 50% of the rated load value of the telescopic boarding bridge, in the first stage loading process, the load data borne by each part of the aluminum alloy truss is obtained in real time through the strain gauges, and the laying position and quantity of the load weight units are adjusted until the load borne by each part of the aluminum alloy truss is the same and reaches the corresponding load value.

[0017] Further, the second stage loading treatment of the telescopic boarding bridge based on the first stage loading state is specifically that, based on the first stage loading state, the load balancing unit is uniformly laid on the aluminum alloy truss with the uniformly pasted strain gauges, and the load value of the second stage loading treatment is 100% of the rated load value of the telescopic boarding bridge. During the second stage loading treatment, the load data borne by each part of the aluminum alloy truss is obtained in real time through the strain gauges, and the laying position of the load balancing unit is adjusted until the load borne by each part of the aluminum alloy truss is the same and reaches the corresponding load value.

[0018] Further, the load balancing unit comprises a flexible bag body and flowable particles in the flexible bag body, the flowable particles account for 30-80% of the rated capacity of the flexible bag body, and the weight of the load balancing unit is 30-35 Kg. During the first stage loading treatment and the second stage loading treatment, the load balancing unit is transported by the hoist mechanism connected to the crane, wherein the hoist mechanism comprises a hoist frame, a door connected to the front end opening of the hoist frame through a hinge, a plurality of lifting rings connected to the upper end of the hoist frame, a plurality of storage grooves provided on the front end surface of the door, a limiting piece movably connected to the inner wall of the storage groove, a plurality of insertion rods connected to the rear end surface of the door, a clamping groove provided on the insertion rod, a limiting slot provided on the front end surface of the hoist frame, a limiting chamber and an adjusting chamber provided in the wall of the hoist frame, a limiting plate provided in the limiting chamber, a spring and a connecting rope connected to the lower end surface of the limiting plate, a wedge connected to the upper end surface of the limiting plate, a worm movably connected to the inner wall of the adjusting chamber, a winding rod connected to one end of the worm, a worm wheel provided in the adjusting chamber, a connecting rod connected to the worm wheel, and an adjusting knob connected to one end of the connecting rod. The limiting chamber is located between the limiting slot and the adjusting chamber, the wedge extends through the limiting chamber and into the limiting slot, one end of the connecting rope extends into the adjusting chamber and is connected to the winding rod, the worm wheel is engaged with the worm, one end of the connecting rod extends to the outside of the hoist frame, and a torsional spring is provided at the connection between the limiting piece and the inner wall of the storage groove.

[0019] Further, the preset time in S5 is 5-10 min.

[0020] Further, the state data of the telescopic boarding bridge during the first stage loading treatment, the state data of the telescopic boarding bridge under the first stage loading state, the state data of the telescopic boarding bridge during the second stage loading treatment, and the state data of the telescopic boarding bridge under the second stage loading state all comprise shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss, and the landing cone.

[0021] Further, the safety condition is specifically that shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone and initial shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone are compared, if the same, the safety condition is met, otherwise, the safety condition is not met.

[0022] The present application has the advantages of:

[0023] 1) The test method in the present application realizes the strength detection of the whole and each core component of the telescopic boarding bridge system through test preparation, no-load test, loading test and post-test inspection, so as to successfully meet the design requirements.

[0024] 2) In the loading test, a plurality of flexible bags are used as load weights, which are sequentially laid on the aluminum alloy truss of the telescopic boarding bridge system, gradually applying load to the aluminum alloy truss, and the deformation of the aluminum alloy truss is monitored in real time to ensure the safety of the test. At the same time, the flexible bags are filled with some particles with high fluidity. Not only can the plurality of flexible bags be evenly laid in each area of the aluminum alloy truss, but also the flowing particles can keep the weight of each part of the single flexible bag evenly distributed after the single flexible bag is flattened by deforming at will, so that the aluminum alloy truss can be loaded according to the requirement of 500Kg / ㎡, which meets the uniform load test emphasized in the test outline and ensures the consistency of the test and the test outline, i.e. the accuracy of the test results.

[0025] 3) The loading test of the present application is divided into two stages, the risk of subsequent loading after the test is preliminarily judged by the first stage of non-full load loading, and the safety of the test is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0027] Figure 1 A flowchart of a telescopic boarding bridge system strength test method of the present application.

[0028] Figure 2 A structural schematic diagram of a telescopic boarding bridge of the present application.

[0029] Figure 3 A structural schematic diagram of a telescopic boarding bridge of the present application.

[0030] Figure 4 A cooperation structure schematic diagram of a telescopic boarding bridge of the present application.

[0031] In the diagram: 1. Test platform; 2. Base; 3. Slewing bearing assembly; 4. A-frame; 5. Aluminum alloy truss; 6. Landing cone; 7. Support frame; 8. Lifting frame; 801. Door stop; 802. Hinge; 803. Lifting ring; 804. Storage slot; 805. Limiting component; 806. Adjusting knob; 807. Connecting rod; 808. Limiting slot; 809. Limiting chamber; 810. Adjusting chamber; 811. Worm gear; 812. Worm wheel; 813. Winding rod; 814. Connecting rope; 815. Limiting plate; 816. Wedge; 817. Insert rod; 818. Slot; 819. Spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] A strength test method for a retractable boarding bridge system, specifically including the following test methods:

[0034] S1: Erect a strength test platform 1, install a retractable boarding bridge on the strength test platform 1, and erect several support frames 7 to support the retractable boarding bridge.

[0035] Among them, such as Figure 2 As shown, the retractable boarding bridge includes a base 2, a slewing bearing assembly 3, an A-frame 4, an aluminum alloy truss 5, and a landing cone 6. The A-frame 4 is mounted on the base 2 via the slewing bearing assembly 3. The upper land side of the aluminum alloy truss 5 is connected to the A-frame 4 via a variable-amplitude cylinder. The lower land side of the aluminum alloy truss 5 is fixed to the A-frame 4 via a hinge. The lower ship side of the aluminum alloy truss 5 is connected to the landing cone 6.

[0036] S2: Evenly attach strain gauges to the load area on the retractable boarding bridge; specifically, evenly attach strain gauges to the aluminum alloy truss 5, and use the strain gauges to monitor the load data of the aluminum alloy truss 5 in real time.

[0037] It should be noted that the strain gauge can obtain the load values ​​at various points of the aluminum alloy truss 5 in real time, which facilitates the precise control of the load values ​​at various points of the aluminum alloy truss 5. The aluminum alloy truss 5 can be loaded precisely according to the requirement of 500Kg / ㎡, and the uniform load test emphasized in the test outline is met.

[0038] S3: Obtain the state data of the telescopic boarding bridge in the empty state; in S3, the state data of the telescopic boarding bridge in the empty state is obtained, specifically, the initial shape data of the base 2, the slewing bearing assembly 3, the A-frame 4, the aluminum alloy truss 5 and the landing cone 6 is obtained when the telescopic boarding bridge is in the empty state.

[0039] It should be noted that the aluminum alloy truss 5 is adjusted as a whole, both ends are simply supported, and the initial shape data of the base 2, the slewing bearing assembly 3, the A-frame 4, the aluminum alloy truss 5 and the landing cone 6 in the telescopic boarding bridge is measured and recorded for comparison with the data obtained in the subsequent loading.

[0040] S4: Perform first-stage loading processing at the load area of the telescopic boarding bridge and obtain the state data of the telescopic boarding bridge in the first-stage loading processing in real time, and after a preset time, obtain the state data of the telescopic boarding bridge in the first-stage loading state;

[0041] In S4, the first-stage loading processing is performed at the load area of the telescopic boarding bridge, specifically, the load counterweight unit is uniformly laid on the aluminum alloy truss 5 with uniformly pasted strain gauges, the load value of the first-stage loading processing is 50% of the rated load value of the telescopic boarding bridge, and in the first-stage loading processing, the load data borne by each part of the aluminum alloy truss 5 is obtained in real time through the strain gauges, and the laying position and quantity of the load counterweight unit are adjusted to stop when the load borne by each part of the aluminum alloy truss 5 is the same and reaches the corresponding load value.

[0042] S5: A safety condition is preset to determine whether the state data obtained in the first-stage loading process of the telescopic boarding bridge and the state data in the first-stage loading state satisfy the safety condition, if yes, the second-stage loading processing is performed on the telescopic boarding bridge based on the first-stage loading state, and the state data of the telescopic boarding bridge in the second-stage loading processing is obtained in real time, and after a preset time, the state data of the telescopic boarding bridge in the second-stage loading state is obtained;

[0043] In S5, the second-stage loading processing is performed on the telescopic boarding bridge based on the first-stage loading state, specifically, the load counterweight unit is continuously uniformly laid on the aluminum alloy truss 5 with uniformly pasted strain gauges based on the first-stage loading state, the load value of the second-stage loading processing is 100% of the rated load value of the telescopic boarding bridge, and in the second-stage loading processing, the load data borne by each part of the aluminum alloy truss 5 is obtained in real time through the strain gauges, and the laying position of the load counterweight unit is adjusted to stop when the load borne by each part of the aluminum alloy truss 5 is the same and reaches the corresponding load value.

[0044] The state data of the telescopic boarding bridge in the first stage loading process, the state data of the telescopic boarding bridge in the first stage loading state, the state data of the telescopic boarding bridge in the second stage loading process and the state data of the telescopic boarding bridge in the second stage loading state all include shape data of the base 2, the slewing bearing assembly 3, the herringbone frame 4, the aluminum alloy truss 5 and the landing cone 6.

[0045] The load counterweight unit comprises a flexible bag body and flowable particles in the flexible bag body, the flowable particles account for 30-80% of the rated capacity of the flexible bag body, and the weight of the load counterweight unit is 30-35 Kg.

[0046] In the first stage loading process and the second stage loading process, the load counterweight unit is transported by the hoist mechanism connected by the crane, wherein the hoist mechanism comprises a hoist frame 8, a door 801 movably connected to the front end opening of the hoist frame 8 through a hinge 802, a plurality of lifting rings 803 connected to the upper end of the hoist frame 8, a plurality of receiving grooves 804 provided on the front end face of the door 801, a limiting piece 805 movably connected to the inner wall of the receiving groove 804, a plurality of insertion rods 817 connected to the rear end face of the door 801, a clamping groove 818 provided on the insertion rod 817, a limiting slot 808 provided on the front end face of the hoist frame 8, a limiting chamber 809 and an adjusting chamber 810 provided in the wall of the hoist frame 8, a limiting plate 815 provided in the limiting chamber 809, a spring 819 and a connecting rope 814 connected to the lower end face of the limiting plate 815, a wedge block 816 connected to the upper end face of the limiting plate 815, a worm 811 movably connected to the inner wall of the adjusting chamber 810, a winding rod 813 connected to one end of the worm 811, a worm wheel 812 provided in the adjusting chamber 810, a connecting rod 807 connected to the worm wheel 812, and an adjusting knob 806 connected to one end of the connecting rod 807, the limiting chamber 809 is located between the limiting slot 808 and the adjusting chamber 810, the wedge block 816 penetrates the limiting chamber 809 and extends into the limiting slot 808, one end of the connecting rope 814 extends into the adjusting chamber 810 and is connected to the winding rod 813, the worm wheel 812 is engaged with the worm 811, one end of the connecting rod 807 extends to the outside of the hoist frame 8, and a torsional spring is arranged at the connecting position of the limiting piece 805 and the inner wall of the receiving groove 804.

[0047] The preset time is 5-10 min.

[0048] It should be noted that when loading, the truck crane is used to hoist the load to one side of the aluminum alloy truss 5, the test personnel transfer the load balancing unit, and then evenly lay it on the aluminum alloy truss 5. The truck crane is equipped with a hoisting mechanism for loading the load balancing unit. The flexible bag body is a common snake skin bag in the test site. The flowable particles are yellow sand, which is conducive to reducing the cost of the test. In order to ensure the flowability of the flowable particles in the flexible bag body and avoid scratching the flexible bag body and the surface of the aluminum alloy truss 5, the particle size is not more than 2.

[0049] It should be noted that when the hoisting mechanism is in use, the adjusting knob 806 is first rotated. When the adjusting knob 806 rotates, the connecting rod 807 and the worm gear 812 connected with the connecting rod 807 rotate in the same direction. After the worm gear 812 rotates, the worm gear 811 rotates. After the worm gear 811 rotates, the winding rod 813 rotates. When the winding rod 813 starts to rotate, the connecting rope 814 gradually winds around the winding rod 813. One end of the connecting rope 814 connected to the limiting plate 815 moves in the direction of the winding rod 813 and pulls the limiting plate 815 to move in the same direction and distance. The wedge block 816 moves in the same direction and distance with the limiting plate 815 until the wedge block 816 is separated from the clamping groove 818 on the insertion rod 817. At this time, the insertion rod 817 is no longer limited and can be separated from the limiting slot 808. At this time, the shutter door 801 can be rotated around the hinge 802 to open the front end opening of the hoisting frame 8, so as to facilitate the placement of the flexible bag body containing flowable particles in the hoisting frame 8.

[0050] When the adjusting knob 806 is no longer subjected to external force, the spring 819 is no longer stressed and begins to recover to its original state, re- ejecting the wedge block 816 into the limiting chamber 809, so as to facilitate the re-limiting of the shutter door 801 when the shutter door 801 is closed.

[0051] When the shutter door 801 is closed, the insertion rod 817 is inserted into the matching limiting slot 808 along the arc-shaped path. During the insertion process, the bottom of one end of the insertion rod 817 first contacts the inclined surface of the wedge block 816 and exerts a downward pressure on it, causing the wedge block 816 to gradually move into the limiting chamber 809. At this time, the spring 819 is in a compressed state. When the insertion rod 817 is completely inserted into the limiting slot 808, the spring 819 rebounds and pushes the wedge block 816 into the clamping groove 818, limiting the insertion rod 817 in the limiting slot 808 and limiting the shutter door 801 at the same time, achieving the convenient effect of self-locking limiting. This allows the staff to conveniently close the shutter door 801 after loading is completed, reducing the work intensity of the staff and shortening the operation time. This enables the flexible bag body containing flowable particles in the hoisting frame 8 to be stably transported, increasing the safety and stability during transportation.

[0052] When the flexible bag containing the flowable particles is carried from the hoisting frame 8 to the aluminum alloy truss 5, the shutter 801 is first opened, and then the limiting piece 805 on the front end face is pried out of the storage groove 804, and the limiting piece 805 is inserted into the gap or the related limiting position on the aluminum alloy truss 5, so that the shutter 801 forms a relatively stable step, and the hoisting frame 8 can also be limited to a certain extent to prevent floating in the suspended state, greatly improving the safety and stability of the hoisting frame 8 in transporting the flexible bag containing the flowable particles.

[0053] S6 judges whether the state data obtained by the telescopic boarding bridge in the second stage loading process and the state data in the second stage loading state satisfy the safety condition based on the safety condition, and if yes, it is determined as a qualified product.

[0054] The safety condition is specifically that the shape data of the base 2, the slewing bearing assembly 3, the herringbone frame 4, the aluminum alloy truss 5 and the landing cone 6 and the initial shape data of the base 2, the slewing bearing assembly 3, the herringbone frame 4, the aluminum alloy truss 5 and the landing cone 6 are compared, if they are the same, the safety condition is met, otherwise, the safety condition is not met.

[0055] It should be noted that when measuring each state data, the deformation amount of the aluminum alloy truss 5 in the corresponding state is measured by a measuring device, and whether the aluminum alloy truss 5 structure has permanent deformation and damage, whether the components and connecting pieces of the telescopic boarding bridge have loosening and falling phenomenon, and whether the base 2 and the structure weld have cracks are checked, and in combination with the above, the strength of the telescopic boarding bridge can be safely tested, and the test data is accurate.

[0056] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of testing the strength of a telescoping pier system, characterized by: The specific test method is as follows: S1: erecting a strength test platform, installing a telescopic boarding bridge on the strength test platform, and erecting a plurality of support cradles for supporting the telescopic boarding bridge; S2: uniformly pasting strain gauges on the load area of the telescopic boarding bridge; S3: obtaining state data of the telescopic boarding bridge in an empty state; S4: performing first-stage loading processing on the load area of the telescopic boarding bridge and obtaining state data of the telescopic boarding bridge in the first-stage loading processing in real time, obtaining state data of the telescopic boarding bridge in a first-stage loading state after a preset time; S5: presetting a safety condition, judging whether the state data obtained in the first-stage loading process and the state data in the first-stage loading state of the telescopic boarding bridge satisfy the safety condition, if yes, performing second-stage loading processing on the telescopic boarding bridge on the basis of the first-stage loading state, obtaining state data of the telescopic boarding bridge in the second-stage loading processing in real time, and obtaining state data of the telescopic boarding bridge in a second-stage loading state after a preset time; S6: judging whether the state data obtained in the second-stage loading process and the state data in the second-stage loading state of the telescopic boarding bridge satisfy the safety condition based on the safety condition, and determining that the telescopic boarding bridge is a qualified product if yes; In the S4, the first-stage loading processing on the load area of the telescopic boarding bridge is specifically that load balancing units are uniformly laid on the aluminum alloy truss on which the strain gauges are uniformly pasted, the load value of the first-stage loading processing is 50% of the rated load value of the telescopic boarding bridge, in the first-stage loading processing, the load data borne by each part of the aluminum alloy truss is obtained in real time through the strain gauges, and the laying position and quantity of the load balancing units are adjusted until the load borne by each part of the aluminum alloy truss is the same and reaches the corresponding load value. The load counterweight unit comprises a flexible bag body and flowable particles arranged in the flexible bag body, the flowable particles account for 30-80% of the rated capacity of the flexible bag body, and the weight of the load counterweight unit is 30-35 Kg; during the first-stage loading process and the second-stage loading process, the load counterweight unit is transported by the hoisting mechanism connected to the crane, wherein the hoisting mechanism comprises a hoisting frame, a door connected to the front end opening of the hoisting frame through a hinge, a plurality of lifting rings connected to the upper end of the hoisting frame, a plurality of receiving grooves arranged on the front end surface of the door, a limiting piece movably connected to the inner wall of the receiving groove, a plurality of insertion rods connected to the rear end surface of the door, a clamping groove arranged on the insertion rod, a limiting slot arranged on the front end surface of the hoisting frame, a limiting chamber and an adjusting chamber arranged in the wall of the hoisting frame, a limiting plate arranged in the limiting chamber, a spring and a connecting rope connected to the lower end surface of the limiting plate, a wedge connected to the upper end surface of the limiting plate, a worm movably connected to the inner wall of the adjusting chamber, a winding rod connected to one end of the worm, a worm wheel arranged in the adjusting chamber, a connecting rod connected to the worm wheel, and an adjusting knob connected to one end of the connecting rod, the limiting chamber is located between the limiting slot and the adjusting chamber, the wedge extends through the limiting chamber and into the limiting slot, one end of the connecting rope extends into the adjusting chamber and is connected to the winding rod, the worm wheel is engaged with the worm, one end of the connecting rod extends to the outside of the hoisting frame, and a torsional spring is arranged at the connection between the limiting piece and the inner wall of the receiving groove.

2. A method of strength testing a retractable trestle system according to claim 1, characterised in that: The telescopic boarding bridge comprises a base, a slewing bearing assembly, an A-frame, an aluminum alloy truss and a landing cone; the A-frame is installed on the base through the slewing bearing assembly, the upper end of the land side of the aluminum alloy truss is connected with the A-frame through a luffing cylinder; the lower end of the land side of the aluminum alloy truss is fixed with the A-frame through a hinge shaft; and the lower end of the ship side of the aluminum alloy truss is connected with the landing cone.

3. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: In S2, strain gauges are uniformly pasted on the load area on the telescopic boarding bridge, specifically, strain gauges are uniformly pasted on the aluminum alloy truss, and the strain gauges are used to monitor the load data borne by the aluminum alloy truss in real time.

4. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: In S3, state data of the telescopic boarding bridge in the empty state is obtained, specifically, when the telescopic boarding bridge is in the empty state, initial shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone is obtained.

5. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: In S5, the telescopic boarding bridge is subjected to the second-stage loading process on the basis of the first-stage loading state, specifically, on the basis of the first-stage loading state, load counterweight units are uniformly laid on the aluminum alloy truss on which the strain gauges are uniformly pasted, the load value of the second-stage loading process is 100% of the rated load value of the telescopic boarding bridge, during the second-stage loading process, the load data borne by each part of the aluminum alloy truss is obtained in real time through the strain gauges, and the laying position of the load counterweight units is adjusted until the load borne by each part of the aluminum alloy truss is the same and reaches the corresponding load value.

6. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: In S5, the preset time is 5-10 min.

7. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: The state data of the telescopic boarding bridge in the first-stage loading processing, the state data of the telescopic boarding bridge in the first-stage loading state, the state data of the telescopic boarding bridge in the second-stage loading processing and the state data of the telescopic boarding bridge in the second-stage loading state all include shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone.

8. A method of strength testing a telescoping wharf system according to claim 1, characterised in that: The safety condition is specifically that shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone and initial shape data of the base, the slewing bearing assembly, the A-frame, the aluminum alloy truss and the landing cone are compared, if the same, the safety condition is met, otherwise, the safety condition is not met.

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