Mechanism for mechanical and thermal modal test of cylindrical product

Abstract

The invention provides a mechanical and thermal modal test mechanism for a cylindrical product, and the mechanism comprises a supporting mechanism which is vertically arranged and is used for horizontally installing the cylindrical product; the flexible static force loading mechanism is used for applying flexible static force to the cylindrical product; the heating mechanism comprises a mounting sleeve and a plurality of groups of heating loops located on the outer surface of the mounting sleeve, and each heating loop is connected with a temperature controller; the cylindrical product is arranged outside the heating mechanism in a sleeving mode and obtains heat from at least one heating loop, static force, heat and dynamic excitation environments are subjected to coordinated loading at the same time through the mechanism for the force and heat modal test of the cylindrical product, and the temperatures of different areas of the cylindrical product are controllable; therefore, richness and accuracy of force-heat modal experiment data are improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical and thermal modal testing of cylindrical products, and in particular to a mechanism for mechanical and thermal modal testing of cylindrical products. Background Art

[0002] High-speed aircraft will experience severe aerodynamic thermal and aerodynamic loads during flight. In order to obtain the structural dynamic response characteristics and structural frequency response change laws of cylindrical aircraft under aerodynamic and aerodynamic thermal states, it is necessary to conduct thermal modal simulation tests on cylindrical products. The mechanisms used in thermal modal simulation tests include flexible static loading mechanisms and heating mechanisms.

[0003] In the mechanical and thermal modal tests of cylindrical products, the existing technology makes it difficult to coordinate the loading of static, thermal and dynamic excitation environments at the same time. In addition, the heating experiments are generally achieved by radiating heat to the surface of the cylindrical product through a heating mechanism. However, the heating mechanism in the existing technology has poor controllability over the heating temperature of different areas of the cylindrical product, which ultimately leads to insufficient and inaccurate mechanical and thermal simulation test data. Summary of the invention

[0004] In view of this, the purpose of this application is to propose a mechanism for mechanical and thermal modal testing of cylindrical products to solve the problems that static, thermal and dynamic excitation environments are difficult to coordinate loading at the same time and that the existing heating mechanism has poor controllability of the heating temperature of different areas of the cylindrical product.

[0005] A mechanism for mechanical and thermal modal testing of cylindrical products, comprising:

[0006] A supporting mechanism, the supporting mechanism is arranged vertically and used for horizontally mounting the cylindrical product;

[0007] Flexible static loading mechanism, used to apply flexible static force to cylindrical products;

[0008] The heating mechanism comprises a mounting sleeve and a plurality of heating circuits located on the outer surface of the mounting sleeve, each of the heating circuits being connected to a temperature controller;

[0009] The cylindrical product is sleeved outside the heating mechanism and obtains heat from at least one of the heating circuits.

[0010] Optionally, each of the heating circuits includes at least two adjacent resistance wire groups, each of the resistance wire groups includes two heating resistance wires, the two heating resistance wires at one end of each of the resistance wire groups are connected through a copper end terminal, and at least one heating resistance wire at the other end is connected to a heating resistance wire in another adjacent resistance wire group in the heating circuit through a copper end terminal.

[0011] Optionally, the mounting sleeve is horizontally mounted on the supporting mechanism, and a plurality of sets of limiting rings are also provided on the mounting sleeve, and are evenly sleeved on the outer surface of the mounting sleeve along the length direction of the mounting sleeve, and each of the heating resistance wires passes through a plurality of sets of limiting rings.

[0012] Optionally, the supporting mechanism includes a supporting sleeve, the supporting sleeve is horizontally arranged, and the mounting sleeve is sleeved outside the supporting sleeve.

[0013] Optionally, a concentricity adjustment device is provided at each end of the support sleeve, and each of the concentricity adjustment devices includes a first adjusting rod group and a second adjusting rod group, the first adjusting rod group and the second adjusting rod group are vertically arranged, the first adjusting rod group includes two oppositely arranged first adjusting rods, the second adjusting rod group includes two oppositely arranged second adjusting rods, the first adjusting rod and the second adjusting rod both pass through the support sleeve and are threadedly connected thereto, and the ends of the first adjusting rod and the second adjusting rod protruding from the support sleeve are opposite to or abut against the inner wall of the mounting sleeve.

[0014] Optionally, the limiting ring is a graphite ring, a ceramic tube is provided between the graphite ring and the heating resistance wire, the ceramic tube is fixedly connected to the limiting ring, the diameter of the ceramic tube is larger than the diameter of the heating resistance wire, each of the copper end heads are provided with connecting nuts on both sides, the connecting nuts are threadedly connected to the heating resistance wire and abut the copper end heads, and one side of each copper end head is also threadedly connected with a top wire, which passes through the copper end head and abuts the heating resistance wire.

[0015] Optionally, the flexible static loading mechanism includes a steel wire rope and a connecting device, the steel wire rope passes through a supporting sleeve, the connecting device is arranged at an end away from the supporting mechanism, and is used to connect the end of the steel wire rope with the end of the cylindrical product, the end of the cylindrical product away from the connecting device is connected to the supporting mechanism, and the end of the steel wire rope away from the connecting device is tensioned to apply flexible static force to the cylindrical product.

[0016] Optionally, the connecting device includes an end cover, a ball head and a first locking assembly, the end cover is clamped with the end of the cylindrical product, the ball head is arranged on the side of the end cover away from the cylindrical product, the steel wire rope passes through the center of the end cover and the center of the ball head in sequence, the first locking assembly is fixedly connected to the end of the steel wire rope, the first locking assembly abuts the ball head, and the ball head abuts the end cover.

[0017] Optionally, the first locking assembly includes a spring steel buckle, an externally threaded barrel and a locking nut, the spring steel buckle includes a connecting barrel and an elastic claw, the end of the wire rope is fixedly connected to the inner wall of the connecting barrel, the elastic claw gradually tilts outward in a direction away from the wire rope, the elastic claw is provided in plurality and is evenly arranged along the circumference of the connecting barrel, the externally threaded barrel is sleeved with the elastic claw, and the locking nut is threadedly connected to the externally threaded barrel.

[0018] Optionally, the support mechanism also includes a support rod, a first connecting plate and a second connecting plate, the support rod is arranged as a pair, the first connecting plate and the second connecting plate are respectively fixedly connected to the pair of support rods, the first connecting plate and the second connecting plate are positioned opposite to each other, the first connecting plate is arranged on a side close to the cylindrical product, the second connecting plate is arranged on a side away from the cylindrical product, the first connecting plate is connected to the cylindrical product, a first connecting hole connected to the cylindrical product is provided on the first connecting plate, the support sleeve is fixedly connected to the second connecting plate through the first connecting hole, a second connecting plate is provided on the second connecting plate to connect to the support sleeve, and the wire rope passes through the second connecting hole.

[0019] From the above, it can be seen that the mechanism for the mechanical and thermal modal test of a cylindrical product provided by the present application includes a supporting mechanism, a flexible static loading mechanism and a heating mechanism. The flexible static loading mechanism provides a force loading environment, and the heating mechanism provides a heating environment. The cylindrical product is vibrated by a force hammer or an exciter to form a dynamic excitation for the cylindrical product. Therefore, the present application realizes a mechanical and thermal modal static loading of the order of 10t by optimizing the mechanical and thermal and dynamic excitation coupling, and solves the thermal protection problem of a high-precision accelerator sensor (dynamic response measurement sensor) by a built-in resistance wire heater method, thereby realizing high-precision dynamic response measurement under large load and precise temperature control conditions;

[0020] The heating mechanism includes a mounting sleeve and multiple heating circuits. The mounting sleeve provides an installation position for the heating circuit. The temperature of each heating circuit is precisely controlled by controlling the temperature controller connected to each heating circuit. The heating mechanism is located inside the cylindrical product. The heat of different heating circuits on the mounting sleeve is radiated to different specific areas of the cylindrical product, so that the temperature of different areas of the cylindrical product can be controlled, thereby improving the richness and accuracy of the thermal simulation experiment data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0023] Figure 2 A cross-sectional view showing the positions of the support sleeve and the mounting sleeve for an embodiment of the present application;

[0024] Figure 3 A schematic diagram showing a heating mechanism according to an embodiment of the present application;

[0025] Figure 4 A schematic diagram showing a resistance wire group according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram showing a concentricity adjustment device according to an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram showing a flexible static loading mechanism according to an embodiment of the present application.

[0028] Reference numerals: 1, support mechanism; 11, support sleeve; 12, support rod; 13, first connecting plate; 131, first connecting hole; 14, second connecting plate; 141, second connecting hole; 2, flexible static loading mechanism; 21, steel wire rope; 22, connecting device; 221, end cover; 222, ball head; 2221, arc-shaped depression; 2222, anti-slip groove; 223, first locking assembly; 2231, spring steel buckle; 223 2. Externally threaded barrel; 2233. Locking nut; 224. Second locking assembly; 3. Heating mechanism; 31. Mounting sleeve; 32. Limiting ring; 321. Ceramic tube; 33. Heating resistance wire; 34. Copper end; 341. Connecting nut; 35. Heating circuit; 351. Resistance wire group; 4. Cylindrical product; 5. Concentricity adjustment device; 51. First adjusting rod; 52. Second adjusting rod; 6. Connecting barrel; 61. Elastic claw. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Based on the background technology, high-speed aircraft will experience severe aerodynamic thermal and aerodynamic loads during flight. In order to obtain the structural dynamic response characteristics and structural frequency response change laws of the cylindrical aircraft under aerodynamic and aerodynamic thermal states, it is necessary to conduct a mechanical and thermal modal simulation test on the cylindrical product. The mechanism used for the mechanical and thermal modal simulation test includes a flexible static loading mechanism and a heating mechanism.

[0032] In the mechanical and thermal modal test of cylindrical products, the heating experiment conducted in the prior art is generally achieved by radiating heat to the surface of the cylindrical product through a heating mechanism. However, the heating mechanism in the prior art has poor controllability over the heating temperature of different areas of the cylindrical product, which ultimately leads to poor operational flexibility of the mechanical and thermal simulation experiment and insufficiently rich and accurate experimental data.

[0033] The following is combined with Figure 1-6 The embodiments of the present application will be described in detail.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, a mechanism for mechanical and thermal modal testing of cylindrical products comprises:

[0035] A support mechanism 1, wherein the support mechanism 1 is vertically arranged to horizontally mount a cylindrical product 4;

[0036] A flexible static loading mechanism 2, used to apply a flexible static force to the cylindrical product 4;

[0037] The heating mechanism 3 includes a mounting sleeve 31 and a plurality of heating circuits 35 located on the outer surface of the mounting sleeve 31, and each of the heating circuits 35 is connected to a temperature controller;

[0038] The cylindrical product 4 is mounted outside the heating mechanism 3 and obtains heat from at least one of the heating circuits 35 .

[0039] The present application provides a mechanism for mechanical and thermal modal testing of a cylindrical product, which includes a support mechanism 1, a flexible static loading mechanism 2 and a heating mechanism 3. The flexible static loading mechanism 2 provides a force loading environment, and the heating mechanism 3 provides a heating environment. The cylindrical product is vibrated by a force hammer or an exciter to form a dynamic excitation for the cylindrical product. Therefore, the present application achieves a mechanical and thermal modal static loading of 10t by optimizing the coupling of mechanical and thermal and dynamic excitation.

[0040] The heating mechanism 3 includes a mounting sleeve 31 and a plurality of heating circuits 35. The mounting sleeve 31 provides a mounting position for the heating circuit 35. The temperature of each heating circuit 35 is precisely controlled by controlling the temperature controller connected to each heating circuit 35. The heating mechanism 3 is located in the cylindrical product 4. The heat of different heating circuits 35 is radiated to different specific areas of the cylindrical product 4, so that the temperature of different areas of the cylindrical product 4 can be controlled, thereby improving the operational flexibility of the mechanical and thermal simulation experiment, and the experimental data is richer and more accurate.

[0041] In addition, since the acceleration sensor is generally installed on the outside of the cylindrical product 4, the heating mechanism 3 in the present application is located inside the cylindrical product 4, which avoids the heating mechanism 3 directly heating the acceleration sensor, ensures the normal operation of the acceleration sensor, and improves the service life of the acceleration sensor.

[0042] Furthermore, the cylindrical product 4 is sleeved outside the mounting sleeve 31, and the heating circuit 35 extends from one end of the mounting sleeve 31 to the other end of the mounting sleeve 31, thereby increasing the heating area of ​​the cylindrical product 4, and the heating circuit 35 is evenly arranged along the circumference of the mounting sleeve 31, thereby improving the heating uniformity of the cylindrical product 4; the heating circuit 35 can be controlled by a temperature controller to produce the same temperature, and can also be controlled by a temperature controller to produce different temperatures, and can be adjusted according to actual experiments to improve the operational flexibility of the mechanical and thermal simulation experiment.

[0043] like Figure 3 and Figure 4 As shown, in some embodiments, each of the heating circuits 35 includes at least two adjacent resistance wire groups 351, each of the resistance wire groups 351 includes two heating resistance wires 33, the two heating resistance wires 33 at one end of each of the resistance wire groups 351 are connected via a copper terminal 34, and at least one heating resistance wire 33 at the other end is connected to one of the heating resistance wires 33 in another adjacent resistance wire group 351 in the heating circuit 35 via a copper terminal 34.

[0044] In the present application, multiple resistance wire groups 351 form a heating loop 35, and the resistance wire group 351 can be easily integrated with other devices or systems, such as being connected to devices such as sensors, temperature controllers and displays to realize an automated temperature control system, and the resistance wire heating can directly convert electrical energy into thermal energy, with high heating efficiency. The heating temperature can be accurately controlled by simply adjusting the current or voltage of the input resistance wire, and the temperature control effect is good; the two heating resistance wires 33 at one end of each resistance wire group 351 are connected through a copper terminal 34, and at least one heating resistance wire 33 at the other end is connected to one of the heating resistance wires 33 in another adjacent resistance wire group 351 in the heating loop 35 through a copper terminal 34. The heating loop 35 formed by the above-mentioned connection method of the resistance wires is continuous and stable, which is convenient for connecting the input end and the input end of the temperature controller, thereby improving the efficiency of the temperature control process.

[0045] like Figure 3 and Figure 4 As shown, specifically, six independently controlled heating circuits 35 are distributed on the surface of the mounting sleeve 31, each heating circuit 35 includes two resistance wire groups 351, each resistance wire group 351 includes two heating resistance wires 33, the heating resistance wires 33 are arranged in parallel along the length direction of the mounting sleeve 31, and the four parallel heating resistance wires 33 are connected to form a heating circuit 35 through three copper terminals 34, wherein two copper terminals 34 are respectively connected to one end of two heating resistance wires 33 in different resistance wire groups 351, and the other copper terminal 34 is connected to the other end of two adjacent heating resistance wires 33 in different resistance wire groups 351, so that the heating circuit 35 formed in this way is a continuous and regular heating circuit with high heating stability; the heating resistance wires 33 are evenly distributed along the circumference of the mounting sleeve 31, thereby improving the uniformity of heating of the cylindrical product 4.

[0046] like Figure 4 As shown, further, both sides of each copper terminal 34 are provided with connecting nuts 341, and the connecting nuts 341 are threadedly connected with the heating resistance wire 33 and abut the copper terminal 34. The two connecting nuts 341 can fix the copper terminal 34 on the heating resistance wire 33, thereby increasing the stability of the copper terminal 34. The connecting nuts 341 can also connect the copper terminal 34 and the heating resistance wire 33, thereby ensuring that the copper terminal 34 and the heating resistance wire 33 can be electrically connected, thereby increasing the stability of the heating circuit 35. One side of each copper terminal 34 is also threadedly connected with a top wire, which passes through the copper terminal 34 and abuts the heating resistance wire 33, and the top wire further increases the stability of the connection between the copper terminal 34 and the heating resistance wire 33.

[0047] like Figure 3 and Figure 4As shown, in some embodiments, the mounting sleeve 31 is horizontally mounted on the supporting mechanism 1, and a plurality of sets of limiting rings 32 are also provided on the mounting sleeve 31, and are evenly sleeved on the outer surface of the mounting sleeve 31 along the length direction of the mounting sleeve 31, and each of the heating resistance wires 33 passes through a plurality of sets of limiting rings 32.

[0048] Specifically, the limiting ring 32 is a graphite ring, a ceramic tube 321 is provided between the graphite ring and the heating resistance wire 33 , the ceramic tube 321 is fixedly connected to the limiting ring 32 , and the diameter of the ceramic tube 321 is greater than the diameter of the heating resistance wire 33 .

[0049] The limiting ring 32 in the present application installs the heating resistor wire 33 on the surface of the mounting sleeve 31, and limits the heating resistor wire 33, so that the heating resistor wire 33 remains parallel and relatively independent, preventing the heating resistor wire 33 from deforming, contacting each other and causing short circuit, and affecting the normal heating of the heating circuit 35. The limiting ring 32 is a graphite ring, which is non-conductive and high-temperature resistant under normal circumstances, and can withstand the heat from the heating resistor wire 33 without deformation. The graphite ring is also convenient for on-site processing and has good on-site adaptability; however, under high pressure, the graphite ring will conduct electricity, and the ceramic tube 321 can prevent the heating circuit 35 from short circuiting when the graphite ring is subjected to high pressure, thereby improving the stability of the heating circuit 35; the heating resistor wire 33 will expand when heated, and the diameter of the ceramic tube 321 is larger than the diameter of the heating resistor wire 33, ensuring that the heating resistor wire 33 can move horizontally in the graphite ring, and ensuring the axial freedom of movement of the heating resistor wire 33 due to thermal expansion.

[0050] Furthermore, high-temperature ceramic glue is coated between the mounting sleeve 31 and the limiting ring 32 to improve the connection stability between the mounting sleeve 31 and the limiting ring 32 , and high-temperature ceramic glue is coated between the limiting ring 32 and the ceramic tube 321 to improve the connection stability between the limiting ring 32 and the ceramic tube 321 .

[0051] like Figure 2 and Figure 5As shown, in some embodiments, the support mechanism 1 includes a support sleeve 11, the support sleeve 11 is horizontally arranged, and the installation sleeve 31 is sleeved outside the support sleeve 11. Concentricity adjustment devices 5 are respectively provided at both ends of the support sleeve 11, and each of the concentricity adjustment devices 5 includes a first adjustment rod group and a second adjustment rod group, the first adjustment rod group and the second adjustment rod group are vertically arranged, the first adjustment rod group includes two oppositely arranged first adjustment rods 51, and the second adjustment rod group includes two oppositely arranged second adjustment rods 52, the first adjustment rod 51 and the second adjustment rod 52 both penetrate the support sleeve 11 and are threadedly connected thereto, and the ends of the first adjustment rod 51 and the second adjustment rod 52 protruding from the support sleeve 11 are opposite to or abut against the inner wall of the installation sleeve 31.

[0052] In the present application, the supporting sleeve 11 provides an installation position and a stable supporting force for the installing sleeve 31, thereby ensuring the stable setting of the installing sleeve 31; since the installing sleeve 31 may have a concentricity deviation in the horizontal direction due to processing reasons, the concentricity adjustment device 5 can well adjust the concentricity of the installing sleeve 31, thereby ensuring the concentricity of the cylindrical product 4 and the installing sleeve 31, and improving the uniformity of heating of the cylindrical product 4.

[0053] The concentricity adjustment device 5 in the present application includes a first adjustment rod group and a second adjustment rod group arranged vertically, the first adjustment rod group includes two first adjustment rods 51 arranged opposite to each other and one of the first adjustment rods 51 is located above the other first adjustment rod 51, the second adjustment rod group includes two second adjustment rods 52 arranged opposite to each other and one of the second adjustment rods 52 is located on one side of the other second adjustment rod 52, the first adjustment rod 51 and the second adjustment rod 52 both penetrate the support sleeve 11 and are threadedly connected thereto, the ends of the first adjustment rod 51 and the second adjustment rod 52 protruding from the support sleeve 11 are opposite to or abut against the inner wall of the mounting sleeve 31; the mounting sleeve 31 needs to be adjusted When adjusting the concentricity, determine which group of concentricity adjusting devices 5 needs to be adjusted according to the spirit level, take out the two first adjusting rods 51 and the two second adjusting rods 52 on this group of concentricity adjusting devices 5, and then screw the two first adjusting rods 51 and the second adjusting rods 52 into the corresponding positions, adjust the positions of the two first adjusting rods 51 upward or downward according to the situation, and then screw the two second adjusting rods 52 into the corresponding positions, and adjust the positions of the two second adjusting rods 52 to the left or right until the mounting sleeve 31 remains horizontal, so that the mounting sleeve 31 and the supporting sleeve 11 maintain concentricity, and the first adjusting rod 51 and the second adjusting rod 52 can also stably support the mounting sleeve 31, so that the mounting sleeve 31 can be stably installed on the supporting sleeve 11.

[0054] like Figure 2 and Figure 6As shown, the flexible static loading mechanism 2 includes a steel wire rope 21 and a connecting device 22. The steel wire rope 21 passes through the supporting sleeve 11. The connecting device 22 is arranged at an end away from the supporting mechanism 1 to connect the end of the steel wire rope 21 with the end of the cylindrical product 4. The end of the cylindrical product 4 away from the connecting device 22 is connected to the supporting mechanism 1. The end of the steel wire rope 21 away from the connecting device 22 is tensioned to apply flexible static force to the cylindrical product 4.

[0055] In the present application, the steel wire rope 21 is used as one of the tools for applying the flexible static force. The main reason is that the steel wire rope 21 can bear a large load, so that it is convenient to apply a larger flexible static force to the cylindrical product 4, thereby improving the flexibility of the flexible static loading test. In addition, the steel wire rope 21 can also maintain good working performance under the heat radiation of the heating mechanism 3, has a good anti-aging effect, and can improve the stability of the mechanical and thermal modal test. The connecting device 22 stably connects the end of the steel wire rope 21 and the end of the cylindrical product 4, providing a stable foundation for the flexible static loading test of the cylindrical product 4. The end of the cylindrical product 4 away from the connecting device 22 is connected to the supporting mechanism 1. Therefore, it is only necessary to tighten the end of the steel wire rope 21 away from the connecting device 22, and both ends of the steel wire cylindrical product 4 will be subjected to the flexible static force. This test method is efficient and effective.

[0056] like Figure 5 As shown, specifically, the steel wire rope 21 passes through the gap between the first adjusting rod group and the second adjusting rod group, and the concentricity adjusting device 5 does not interfere with the steel wire rope 21, thereby ensuring the normal use of the steel wire rope 21 and the concentricity adjusting device 5. The first adjusting rod group and the second adjusting rod group limit the steel wire rope 21 to a certain extent to prevent the steel wire rope 21 from shifting during the tensioning process, thereby ensuring the normal progress of the flexible static loading test.

[0057] like Figure 2 and Figure 6 As shown, in some embodiments, the connecting device 22 includes an end cover 221, a ball head 222 and a first locking assembly 223. The end cover 221 is clamped with the end of the cylindrical product 4, and the ball head 222 is arranged on the side of the end cover 221 away from the cylindrical product 4. The steel wire rope 21 passes through the center of the end cover 221 and the center of the ball head 222 in sequence. The first locking assembly 223 is fixedly connected to the end of the steel wire rope 21, and the first locking assembly 223 abuts the ball head 222, and the ball head 222 abuts the end cover 221.

[0058] Specifically, an arc-shaped recess 2221 is provided on one side of the end cover 221 close to the ball head 222, and the arc-shaped recess 2221 is adapted to the ball head 222, thereby increasing the contact area between the ball head 222 and the end cover 221 and facilitating force transmission. An anti-slip groove 2222 is provided on one side of the ball head 222 close to the first locking component 223, and the first locking component 223 is installed in the anti-slip groove 2222. On the one hand, it prevents the first locking component 223 from slipping from the top of the ball head 222, and on the other hand, it increases the contact area between the first locking component 223 and the ball head 222 and facilitates force transmission.

[0059] The first locking component 223 locks the wire rope 21 to prevent the wire rope 21 from detaching from the end of the cylindrical product 4 away from the supporting mechanism 1. The ball head 222 serves as a flexible connection point, which can effectively transmit the force from the wire rope 21 and disperse it to the end cover 221. When it is necessary to perform a flexible static loading test on the cylindrical product 4, the wire rope 21 is gradually tensioned. The first locking component 223 gradually applies a flexible static force to the ball head 222 driven by the wire rope 21. The ball head 222 gradually applies a flexible static force to the end cover 221. The end cover 221 gradually applies a flexible static force to the cylindrical product 4 until the flexible static force loading test on the cylindrical product 4 is completed, and then the wire rope 21 is released.

[0060] like Figure 2 and Figure 6 As shown, in some embodiments, the first locking assembly 223 includes a spring steel buckle 2231, an externally threaded barrel 2232 and a locking nut 2233, the spring steel buckle 2231 includes a connecting barrel 6 and an elastic claw 61, the end of the steel wire rope 21 is fixedly connected to the inner wall of the connecting barrel 6, the elastic claw 61 gradually tilts outward in a direction away from the steel wire rope 21, the elastic claw 61 is provided in plurality and is evenly arranged along the circumference of the connecting barrel 6, the externally threaded barrel 2232 is sleeved with the elastic claw 61, and the locking nut 2233 is threadedly connected to the externally threaded barrel 2232.

[0061] Specifically, the connecting tube 6 provides a connection position for the elastic claw 61 and the steel wire rope 21, and the inner wall of the external threaded tube 2232 gradually shrinks toward the ball head 222 to fit the outer wall of the elastic claw 61. The end of the steel wire rope 21 away from the first locking assembly 223 is provided with a second locking assembly 224, and the second locking assembly 224 has the same structure as the first locking assembly 223. The locking nut 2233 of the second locking assembly 224 is fixedly connected with two ears for connecting the tensioning mechanism, and the second locking assembly 224 provides a connection position for the two ears.

[0062] In the present application, after the elastic claw 61 is subjected to the pulling force from the wire rope 21, the elastic claw 61 will be further clamped with the external threaded tube 2232. As the wire rope 21 is gradually tightened, the elastic claw 61 and the threaded tube will also be gradually clamped, further preventing the wire rope 21 from detaching from the end of the cylindrical product 4 away from the support mechanism 1.

[0063] like Figure 1 and Figure 2 As shown, in some embodiments, the support mechanism 1 also includes a support rod 12, a first connecting plate 13 and a second connecting plate 14, the support rod 12 is arranged as a pair, the first connecting plate 13 and the second connecting plate 14 are respectively fixedly connected to the pair of support rods 12, the first connecting plate 13 and the second connecting plate 14 are positioned opposite to each other, the first connecting plate 13 is arranged on a side close to the cylindrical product 4, the second connecting plate 14 is arranged on a side away from the cylindrical product 4, the first connecting plate 13 is connected to the cylindrical product 4, the first connecting plate 13 is provided with a first connecting hole 131 connected to the cylindrical product 4, the support sleeve 11 is fixedly connected to the second connecting plate 14 through the first connecting hole 131, the second connecting plate 14 is provided with a second connecting hole 141 connected to the support sleeve 11, and the wire rope 21 passes through the second connecting hole 141.

[0064] Specifically, the support rod 12 is provided with a plurality of installation positions in the vertical direction, and the first connecting plate 13 and the second connecting rod can be installed at installation positions at different heights according to actual conditions to adjust the installation heights of the cylindrical static product, the support sleeve 11 and the installation sleeve 31, thereby improving the flexibility of the mechanical and thermal modal test of the cylindrical product 4.

[0065] In the present application, the layout of the first connecting plate 13 and the second connecting plate 14 is reasonable. The first connecting plate 13 provides an installation position for the cylindrical product 4, and the second connecting plate 14 provides an installation position for the supporting sleeve 11, thereby avoiding the centralized installation of the cylindrical product 4 and the supporting sleeve 11, increasing the bearing capacity of the connecting plate, and affecting the service life of the connecting plate.

[0066] In summary, the cylindrical thermal modal testing mechanism of the present invention couples thermal and dynamic excitation environments, realizes thermal and dynamic modal static loading of 10t, and at the same time improves the heating uniformity and heating controllability in the thermal environment, solves the problem of failure of the acceleration sensor in the thermal environment in the prior art, and solves the problems of deformation, short circuit, dislocation and stability of the heating resistor 33.

[0067] It should be noted that the method of the embodiment of the present invention can be performed by a single device, such as a computer or a server. The method of this embodiment can also be applied in a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present invention, and the multiple devices will interact with each other to complete the described method.

[0068] It should be noted that some embodiments of the present invention are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0069] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0070] Although the invention has been described in conjunction with specific embodiments of the invention, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0071] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanism for thermal modal testing of cylindrical products, characterized in that: include: A support mechanism (1), wherein the support mechanism (1) is arranged vertically and is used to horizontally mount the cylindrical product (4); A flexible static force loading mechanism (2) is used to apply a flexible static force to the cylindrical product (4); The heating mechanism (3) comprises a mounting sleeve (31) and a plurality of heating circuits (35) located on the outer surface of the mounting sleeve (31), each of the heating circuits (35) being connected to a temperature controller; The cylindrical product (4) is sleeved outside the heating mechanism (3) and obtains heat from at least one heating circuit (35).

2. A mechanism for thermal modal testing of cylindrical products according to claim 1, characterized in that: Each of the heating circuits (35) comprises at least two resistance wire groups (351) arranged adjacent to each other, each of the resistance wire groups (351) comprises two heating resistance wires (33), the two heating resistance wires (33) at one end of each of the resistance wire groups (351) are connected via a copper terminal (34), and at least one heating resistance wire (33) at the other end is connected to a heating resistance wire (33) in another adjacent resistance wire group (351) in the heating circuit (35) via a copper terminal (34).

3. The mechanism for thermal modal testing of cylindrical products according to claim 1, characterized in that: The mounting sleeve (31) is horizontally mounted on the supporting mechanism (1), and a plurality of groups of limiting rings (32) are also provided on the mounting sleeve (31), and are evenly sleeved on the outer surface of the mounting sleeve (31) along the length direction of the mounting sleeve (31), and each of the heating resistance wires (33) passes through the plurality of groups of limiting rings (32).

4. The mechanism for thermal modal testing of cylindrical products according to claim 1, characterized in that: The support mechanism (1) comprises a support sleeve (11), the support sleeve (11) is arranged horizontally, and the installation sleeve (31) is sleeved outside the support sleeve (11).

5. The mechanism for thermal modal testing of cylindrical products according to claim 4, characterized in that: A concentricity adjustment device (5) is provided at each end of the support sleeve (11), and each of the concentricity adjustment devices (5) comprises a first adjustment rod group and a second adjustment rod group, the first adjustment rod group and the second adjustment rod group are vertically arranged, the first adjustment rod group comprises two first adjustment rods (51) arranged opposite to each other, the second adjustment rod group comprises two second adjustment rods (52) arranged opposite to each other, the first adjustment rod (51) and the second adjustment rod (52) both pass through the support sleeve (11) and are threadedly connected thereto, and the ends of the first adjustment rod (51) and the second adjustment rod (52) protruding from the support sleeve (11) are opposite to or abut against the inner wall of the mounting sleeve (31).

6. The mechanism for thermal modal testing of cylindrical products according to claim 3, characterized in that: The limiting ring (32) is a graphite ring. A ceramic tube (321) is provided between the graphite ring and the heating resistance wire (33). The ceramic tube (321) is fixedly connected to the limiting ring (32). The diameter of the ceramic tube (321) is larger than the diameter of the heating resistance wire (33). Connecting nuts (341) are provided on both sides of each copper end head (34). The connecting nuts (341) are threadedly connected to the heating resistance wire (33) and abut against the copper end head (34). A top screw is also threadedly connected to one side of each copper end head (34). The top screw passes through the copper end head (34) and abuts against the heating resistance wire (33).

7. The mechanism for thermal modal testing of cylindrical products according to claim 4, characterized in that: The flexible static loading mechanism (2) comprises a steel wire rope (21) and a connecting device (22). The steel wire rope (21) passes through a supporting sleeve (11). The connecting device (22) is arranged at an end away from the supporting mechanism (1) and is used to connect the end of the steel wire rope (21) with the end of the cylindrical product (4). The end of the cylindrical product (4) away from the connecting device (22) is connected to the supporting mechanism (1). The end of the steel wire rope (21) away from the connecting device (22) is tensioned to apply a flexible static force to the cylindrical product (4).

8. The mechanism for thermal modal testing of cylindrical products according to claim 7, characterized in that: The connecting device (22) comprises an end cover (221), a ball head (222) and a first locking assembly (223); the end cover (221) is clamped with the end of the cylindrical product (4); the ball head (222) is arranged on a side of the end cover (221) away from the cylindrical product (4); the steel wire rope (21) passes through the center of the end cover (221) and the center of the ball head (222) in sequence; the first locking assembly (223) is fixedly connected to the end of the steel wire rope (21); the first locking assembly (223) abuts against the ball head (222); and the ball head (222) abuts against the end cover (221).

9. A mechanism for thermal modal testing of cylindrical products according to claim 8, characterized in that: The first locking assembly (223) comprises a spring steel buckle (2231), an externally threaded barrel (2232) and a locking nut (2233); the spring steel buckle (2231) comprises a connecting barrel (6) and an elastic claw (61); the end of the steel wire rope (21) is fixedly connected to the inner wall of the connecting barrel (6); the elastic claw (61) gradually tilts outward in a direction away from the steel wire rope (21); a plurality of elastic claws (61) are arranged and are evenly arranged along the circumference of the connecting barrel (6); the externally threaded barrel (2232) is sleeved with the elastic claw (61); and the locking nut (2233) is threadedly connected to the externally threaded barrel (2232).

10. A mechanism for thermal modal testing of cylindrical products according to claim 7, characterized in that: The support mechanism (1) further comprises a support rod (12), a first connecting plate (13) and a second connecting plate (14); the support rod (12) is arranged as a pair; the first connecting plate (13) and the second connecting plate (14) are respectively fixedly connected to the pair of support rods (12); the first connecting plate (13) and the second connecting plate (14) are positioned opposite to each other; the first connecting plate (13) is arranged on a side close to the cylindrical product (4); the second connecting plate (14) is arranged on a side away from the cylindrical product (4); the first connecting plate (13) is connected to the cylindrical product (4); a first connecting hole (131) communicating with the cylindrical product (4) is provided on the first connecting plate (13); the support sleeve (11) passes through the first connecting hole (131) and is fixedly connected to the second connecting plate (14); the second connecting plate (14) is provided with a second connecting hole (141) communicating with the support sleeve (11); the steel wire rope (21) passes through the second connecting hole (141).

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