Load frame for impact testing apparatus and impact testing apparatus

Abstract

This application relates to a load frame for an impact testing device and the impact testing device itself. The load frame includes a frame body and a base plate. The frame body encloses a load space for accommodating the test specimen. The base plate is connected to the bottom of the frame body and is inclined relative to the horizontal plane, so that the base elastically connected to the base plate can also be inclined relative to the horizontal plane. Thus, when the base is impacted, the test specimen installed in the load frame can be subjected to both vertical and horizontal impact forces simultaneously. Furthermore, the inclination angle of the base plate can be designed and adjusted to ensure that the load frame is subjected to a large magnitude of lateral impact load in the horizontal direction. Therefore, it can more realistically simulate the impact response and tolerance of elastically installed shipborne equipment under impact conditions, and can also more realistically simulate the inherent characteristics of the ship deck.

Description

Technical Field

[0001] This application relates to the field of impact resistance testing technology for ship equipment, and in particular to a load frame for an impact testing device and an impact testing device. Background Technology

[0002] During their service, ships inevitably experience non-contact impacts such as transient shock waves and bubble pulsation pressure in the water. Military vessels, in particular, may also be attacked by weapons such as bombs, missiles, torpedoes, and mines. For a long time, researchers have studied the impact environment experienced by equipment installed on ships under impact loads such as underwater explosions. This research aims to simulate the impact environment at the actual installation sites of shipborne equipment, assess its response and tolerance under real impact conditions, and evaluate and verify its shock resistance performance, thereby ensuring the impact safety and reliability of shipborne equipment.

[0003] Therefore, when simulating the impact on shipborne equipment, the test specimen needs to be placed in a load frame elastically connected to a base. The base is then subjected to an impact, causing the load frame to vibrate relative to the base, thus simulating the impact response and tolerance of elastically mounted shipborne equipment under impact conditions. However, in actual working conditions, when the test specimen is subjected to explosive impacts or other physical impacts, it will simultaneously experience vertical and horizontal impact forces. Therefore, during the test, how to design the load frame so that the test specimen mounted within it can simultaneously experience vertical and horizontal impact forces, especially how to ensure that the horizontal impact force experienced by the test specimen has a large lateral impact magnitude, becomes a problem that researchers need to consider. Summary of the Invention

[0004] Therefore, it is necessary to provide a load frame and an impact testing device for impact testing, addressing the problem of how to subject the test specimen to impact forces in both the vertical and horizontal directions during impact testing.

[0005] According to one aspect of this application, a load frame for an impact testing apparatus is provided, the load frame including a frame body and a base plate, the frame body enclosing a load space for accommodating a test specimen; the base plate is connected to the bottom of the frame body and is inclined relative to the horizontal plane.

[0006] In one embodiment, the frame includes a bottom frame, a top frame, and multiple columns. The bottom frame and the top frame are spaced apart in the vertical direction, and all the columns are spaced apart around a circumference. One end of each column is connected to the bottom frame, and the other end is connected to the top frame. The cargo space is formed by the bottom frame, the top frame, and all the columns.

[0007] In one embodiment, the bottom frame and the top frame are respectively spliced ​​from multiple profiles and are polygonal in shape. The top frame has a loading and unloading channel that connects to the cargo space. The bottom frame is provided with a support plate, which constitutes the bottom wall of the cargo space.

[0008] In one embodiment, the support plate is provided with multiple support beams, each of which has a mounting hole for fasteners to be inserted so that the fasteners fix the test piece on the support beam.

[0009] In one embodiment, the base plate is connected to the bottom of the frame by a plurality of spaced stiffeners. One edge of each stiffener is connected to the bottom of the frame, and the other edge is connected to the base plate. The edge of each stiffener connected to the base plate is inclined relative to the horizontal plane, so that the base plate is inclined.

[0010] In one embodiment, each of the stiffening plates has multiple weight-reducing holes that extend through both sides of its thickness direction, and the multiple weight-reducing holes form multiple spaced connecting columns on the stiffening plate.

[0011] In one embodiment, each of the stiffening plates is connected to a plurality of reinforcing ribs that correspond one-to-one with the connecting columns. One end of each reinforcing rib is connected to the frame and the other end is connected to the bottom plate. The reinforcing rib is perpendicular to the stiffening plate and connected to the stiffening plate.

[0012] In one embodiment, the cargo frame is provided with lifting lugs for connecting to a boom so that the cargo frame can be lifted by the boom.

[0013] In one embodiment, the base plate is tilted at an angle of 20°-30° relative to the horizontal plane.

[0014] According to another aspect of this application, an impact testing apparatus is provided, comprising a load frame as described in any of the above embodiments.

[0015] The aforementioned load-bearing frame and impact testing device including the load-bearing frame, by setting a base plate at the bottom of the load-bearing frame that is inclined relative to the horizontal plane, allows the base elastically connected to the base plate to also be inclined relative to the horizontal plane. Thus, when the base is impacted, the test specimen installed in the load-bearing frame can be subjected to impact forces in both the vertical and horizontal directions simultaneously. Furthermore, the inclination angle of the base plate can be designed and adjusted to make the magnitude of the lateral impact load in the horizontal direction on the load-bearing frame relatively large. Therefore, it can more realistically simulate the impact resistance and tolerance of elastically installed shipborne equipment in an impact environment, and can also more realistically simulate the inherent characteristics of the ship deck. Attached Figure Description

[0016] Figure 1 This is a front view of an impact testing apparatus provided in an embodiment of this application.

[0017] Figure 2 A perspective view of a loading frame provided in an embodiment of this application.

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of region A in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10. Impact testing device; 100. Loading frame; 110. Frame body; 110a. Loading space; 110b. Loading and unloading passage; 111. Bottom frame; 112. Top frame; 113. Column; 114. Bearing plate; 115. Bearing beam; 120. Base plate; 130. Stiffening plate; 131. Weight reduction hole; 132. Connecting column; 133. Reinforcing rib; 140. Lifting lug; 200. Base; 300. Elastic element; 400. Base; 500. Drive mechanism; 600. Boom; 700. Unhooking. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] This application provides a load frame for an impact testing apparatus and an impact testing apparatus including the load frame. The impact testing apparatus is used to simulate the scenario when test specimens such as shipboard equipment elastically installed in a ship are subjected to an explosive impact or a collision. The purpose is to obtain the impact response parameters of the test specimens in order to evaluate whether the test specimens fail after being subjected to an impact or collision in the above-mentioned scenario, thereby ensuring the pass rate of the test specimens. The load frame is used to support and fix the test specimens.

[0028] The structure of the load-bearing frame and impact testing device provided in this application will be described below. It is understood that the impact testing device provided in this application is not limited to using it only for impact simulation of shipborne equipment elastically installed in ships; it can also be used to conduct impact tests on any test piece requiring such simulation, without any particular limitation.

[0029] See Figure 1 See Figure 1 , Figure 1 This diagram illustrates a perspective view of an impact testing apparatus 10 according to an embodiment of this application. The impact testing apparatus 10 provided in this embodiment includes a load frame 100, a base 200, a pedestal 400, and a drive mechanism 500. The load frame 100 is elastically connected to the base 200 via an elastic element 300, such as a spring, magnetorheological fluid damper, or damping cylinder. The pedestal 400 is mounted on a ground foundation, with the base 200 and load frame 100 located above the pedestal 400. The load frame 100 carries the test specimen and is connected to the drive mechanism 500 via a boom 600. Driven by the drive mechanism 500, the load frame 100 and the base 200 can move together in a vertical or near-vertical direction, causing the base 200 to fall and collide with the pedestal 400, thus causing the load frame 100 to vibrate relative to the base 200, thereby simulating the scenario of the test specimen being subjected to an explosion or physical impact.

[0030] Specifically, such as Figure 2 As shown, the loading frame 100 is welded from multiple profiles and plates, including a frame body 110 and a base plate 120. The frame body 110 encloses a loading space 110a for accommodating the test specimen. The base plate 120 is connected to the bottom of the frame body 110 and is inclined relative to the horizontal plane. The purpose of designing the bottom to be inclined relative to the horizontal plane is to account for the fact that the test specimen will be subjected to both vertical and horizontal impact forces when subjected to explosive impact or other physical impacts. Assuming that the angle of inclination of the base plate 120 relative to the horizontal plane is α, the base 200, which is elastically connected to the base plate 120, is also inclined relative to the horizontal plane at the same angle α. At the same time, the impact surface of the base 400 for colliding with the base 200 is also designed to be inclined relative to the horizontal plane at the same angle α. Thus, when the base 200 and the base 400 collide with each other, the test specimen installed in the loading frame 100 can be subjected to both vertical and horizontal impact forces simultaneously. In a preferred embodiment, the tilt angle α is 20°-30°; more preferably, the tilt angle α is 27°, so that the magnitude of the impact force in the horizontal direction can reach half the magnitude of the impact force in the vertical direction, thus more closely resembling the actual working conditions.

[0031] More specifically, in Figure 2In one embodiment, the frame 110 includes a bottom frame 111, a top frame 112, and multiple columns 113. The bottom frame 111 and the top frame 112 are spaced apart vertically, and all the columns 113 are spaced apart around the circumference. One end of each column 113 is connected to the bottom frame 111, and the other end is connected to the top frame 112. The loading space 110a is enclosed by the bottom frame 111, the top frame 112, and all the columns 113. Optionally, the bottom frame 111 and the top frame 112 are each formed by multiple profiles connected end to end and forming a polygon. The top frame 112 has a loading and unloading channel 110b that connects to the loading space 110a. The bottom frame 111 is provided with a support plate 114, which forms the bottom wall of the loading space 110a. With the above design, the test specimen can be lifted by a crane to the top of the loading frame 100 and placed into the loading space 110a from the loading and unloading channel 110b, where it is supported by the bearing plate 114.

[0032] Considering that the test specimen needs to be placed stably on the load frame 100 during the vibration caused by the impact seat and the base 400 colliding with each other, so as to prevent the test specimen from moving randomly in the load space 110a and from falling off the load frame 100, the load space 110a is provided with multiple load beams 115, and multiple mounting holes (not shown in the figure) are opened on the load beams 115. The mounting holes are used for fasteners such as screws or bolts to be inserted so that the test specimen can be fixed on the load beams 115 by fasteners and can be easily removed from the load beams 115.

[0033] Furthermore, considering that in order to facilitate the inclined connection of the base plate 120 to the frame 110, the base plate 120 is connected to the bottom of the frame 110 by a plurality of spaced stiffeners 130. Specifically, one end edge of each stiffener 130 is connected to the bottom of the bottom frame 111, and the other end edge is connected to the base plate 120. The end edge of each stiffener 130 connected to the base plate 120 is processed to be inclined at an angle of α relative to the horizontal plane, so that the base plate 120 can be inclined relative to the horizontal plane by welding to the inclined edge of the stiffener 130.

[0034] Furthermore, such as Figure 3 As shown, each stiffening plate 130 has multiple weight-reducing holes 131 extending through both sides of its thickness direction. Multiple weight-reducing holes 131 form multiple spaced connecting columns 132 on the stiffening plate 130. In this way, the overall weight of the load frame 100 can be greatly reduced, and by opening the weight-reducing holes 131, space can be left for operators to perform hand operations when necessary.

[0035] Meanwhile, in order to strengthen the support of the stiffening plate 130 and prevent the stiffening plate 130 from failing and breaking, each stiffening plate 130 is connected with multiple reinforcing ribs 133 that correspond one-to-one with the connecting column 132. One end of each reinforcing rib 133 is connected to the frame 110, and the other end is connected to the bottom plate 120. The reinforcing rib 133 is perpendicular to the stiffening plate 130 and connected to the stiffening plate 130.

[0036] In addition, to facilitate the connection between the boom 600 and the load frame 100, the load frame 100 is provided with a lifting lug 140. The lifting lug 140 is used to connect with a release hook 700 connected to one end of the boom 600, so that the release hook 700 can grab the lifting lug 140. Thus, the load frame 100 can be lifted by the boom 600, and the lifting lug 140 can be released by the release hook 700, so that the load frame 100 and the base 200 can fall under the action of gravity, thereby causing the base 200 to collide with the base 400.

[0037] Therefore, the load frame 100 for the impact test device 10 provided in this application, by setting a base plate 120 at the bottom of the load frame 100 that is inclined relative to the horizontal plane, allows the base 200 that is elastically connected to the base plate 120 to also be inclined relative to the horizontal plane. Thus, when the base 200 is impacted, the test specimen installed in the load frame 100 can be subjected to both vertical and horizontal impact forces simultaneously. Furthermore, the tilt angle of the base plate 120 can be designed and adjusted to make the magnitude of the lateral impact load in the horizontal direction on the load frame 100 relatively large. Therefore, it can more realistically simulate the impact response and tolerance of elastically installed shipborne equipment in an impact environment, and can also more realistically simulate the inherent characteristics of the ship deck.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A carrier frame for an impact testing device, characterized in that, The loading frame (100) includes a frame (110) and a base plate (120). The frame (110) encloses a loading space (110a) for accommodating the test specimen. The base plate (120) is connected to the bottom of the frame (110) and is inclined relative to the horizontal plane.

2. The carrier frame of claim 1, wherein, The frame (110) includes a bottom frame (111), a top frame (112), and multiple columns (113). The bottom frame (111) and the top frame (112) are spaced apart in the vertical direction. All the columns (113) are spaced apart around a circumference. One end of each column (113) is connected to the bottom frame (111), and the other end is connected to the top frame (112). The carrying space (110a) is formed by the bottom frame (111), the top frame (112), and all the columns (113).

3. The carrier frame of claim 2, wherein, The bottom frame (111) and the top frame (112) are respectively spliced ​​from multiple profiles and are polygonal in shape. The top frame (112) has a loading and unloading channel (110b) that connects to the cargo space (110a). The bottom frame (111) is provided with a support plate (114), and the support plate (114) constitutes the bottom wall of the cargo space (110a).

4. The object carrier frame of claim 3, wherein, The support plate (114) is provided with multiple support beams (115), and each support beam (115) is provided with a mounting hole for fasteners to be inserted so that the fasteners fix the test piece on the support beam (115).

5. The object carrier frame of claim 1, wherein, The base plate (120) is connected to the bottom of the frame (110) by a plurality of spaced stiffeners (130). One end edge of each stiffener (130) is connected to the bottom of the frame (110), and the other end edge is connected to the base plate (120). The end edge of each stiffener (130) connected to the base plate (120) is inclined relative to the horizontal plane, so that the base plate (120) is inclined.

6. The object carrier frame of claim 5, wherein, Each of the stiffening plates (130) has multiple weight-reducing holes (131) extending through both sides of its own thickness direction, and the multiple weight-reducing holes (131) form multiple spaced connecting posts (132) on the stiffening plate (130).

7. The object carrier frame of claim 6, wherein, Each of the stiffening plates (130) is connected to a plurality of reinforcing ribs (133) that correspond one-to-one with the connecting columns (132). One end of each reinforcing rib (133) is connected to the frame (110), and the other end is connected to the bottom plate (120). The reinforcing rib (133) is perpendicular to the stiffening plate (130) and connected to the stiffening plate (130).

8. The object carrier frame of claim 1, wherein, The cargo frame is provided with lifting lugs (140) for connecting to the boom (600) so that the cargo frame can be lifted by the boom (600).

9. The object carrier frame of claim 1, wherein, The inclination angle of the base plate (120) relative to the horizontal plane is 20°-30°.

10. An impact testing device characterized by, Includes the cargo frame (100) as described in any one of claims 1-9.

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