Load testing method for reverse thrust movement outer cover

Abstract

The application discloses a load test method for a reverse push moving cover. The load test method comprises the following steps: obtaining a load-stroke curve; obtaining a basic relation curve between the stroke and time of the reverse push moving cover under an empty load condition; obtaining an initial relation curve between the load and time under an actual test load condition according to the load-stroke curve and the basic relation curve between the stroke and time; applying a test load to the reverse push moving cover according to the initial relation curve between the load and time to perform a first time reverse push opening and closing test, and obtaining a first time used by the reverse push moving cover in the reverse push opening and closing process; and repeating the above steps until the difference between the times used in the reverse push opening and closing processes of two adjacent reverse push opening and closing tests is less than a set value, so as to obtain a target relation curve between the stroke and time of the reverse push moving cover according to the relation curve between the stroke and time obtained in the last reverse push opening and closing test.

Description

TECHNICAL FIELD

[0001] The present application relates to a load test method of a moving outer cover. BACKGROUND

[0002] The reverse thrust device is an important component of the short nacelle of large transport aircraft and large passenger aircraft. Its main function is to obtain reverse thrust by changing the direction of engine exhaust flow, so as to make the aircraft slow down efficiently and reliably, significantly shorten the landing sliding distance of the aircraft, and play a particularly important role on wet and icy runways. It can reduce the requirements of the aircraft on the airport and improve the utilization efficiency of the airport. At the same time, it can also be applied to interrupted take-off of the aircraft and improve the safety of the aircraft operation.

[0003] The reverse thrust device widely used in large-bypass-ratio turbofan aircraft engines at present is a cascade reverse thrust device. The cascade reverse thrust device includes a C-type cascade reverse thrust device and an O-type cascade reverse thrust device. The structure of the C-type cascade reverse thrust device will be introduced below. As shown in Figure 1 The C-type cascade reverse thrust device includes two C-type ducts 100 arranged symmetrically. Arrow F shows the forward direction of the aircraft. The C-type duct 100 includes a fixed structure 10 and a moving outer cover 20. As shown in Figure 2 The fixed structure 10 includes an upper sliding rail beam 11, a lower sliding rail beam 12, a torque box 13, a core nacelle cover 14, and a cascade 15. As shown in Figure 3 The upper sliding rail beam 11 has an upper sliding rail groove 111, as shown in Figure 4 The lower sliding rail beam 12 has a lower sliding rail groove 121. As shown in Figures 5 to 9 The moving outer cover 20 includes an upper sliding rail 21, a lower sliding rail 22, an outer wall plate 23, an outer duct outer wall 24, a plurality of blocker doors 25, and a plurality of pull rods 26.

[0004] When the reverse thrust device is working, the moving outer cover 20 is driven by the hydraulic reverse thrust actuating system (H-TRAS) to move backward relative to the fixed structure 10, which is opposite to the direction shown by arrow F. The upper sliding rail 21 of the moving outer cover 20 translates backward in the upper sliding rail groove 111, and the lower sliding rail 22 translates backward in the lower sliding rail groove 121. The outer duct outer wall front end support drives the front end supports of the plurality of blocker doors 25 to translate, at the same time, the plurality of blocker doors 25 are deflected under the action of the corresponding pull rods 26, and finally block the reverse thrust outer duct airflow. The outer duct airflow is deflected after passing through the blocker doors 25 and is discharged to the oblique front direction through the cascade 15, thereby generating reverse thrust. The single blocker door 25, the related supports on the blocker door 25, and the corresponding pull rod constitute a single set of reverse thrust blocker door mechanism. For each C-type duct 100, it includes five sets of reverse thrust blocker door mechanisms, and the motion law of the five sets of reverse thrust blocker door mechanisms is completely consistent.

[0005] Since the driving oil pressure of the actuating cylinder of the hydraulic reverse thrust actuating system changes with the change of the external load, when the reverse thrust is driven by the hydraulic reverse thrust actuating system, the time for opening and closing the reverse thrust once under different external loads is not the same, so it is difficult to directly obtain the opening and closing stroke and actual load of the mobile outer cover at each time point under various working conditions. The opening and closing stroke and actual load of the mobile outer cover at each time point under various working conditions are the key to solving the interface reliability problem of the sliding rail and sliding groove of the mobile outer cover.

[0006] It should be noted that the statements in this background section are provided only to assist in understanding the invention and are not necessarily prior art. SUMMARY

[0007] The application provides a load test method for reverse thrust mobile outer cover to obtain a relationship curve between stroke and time of the mobile outer cover close to the real one.

[0008] The application provides a load test method for reverse thrust mobile outer cover, comprising the following steps:

[0009] An aerodynamic model of the reverse thrust mobile outer cover is established, and the load borne by the reverse thrust mobile outer cover at each stroke during the opening and closing process is calculated according to the aerodynamic model to obtain a relationship curve between load and stroke;

[0010] Under the no-load working condition, the reverse thrust mobile outer cover is driven to perform a reverse thrust opening and closing test to obtain a basic relationship curve between stroke and time of the reverse thrust mobile outer cover;

[0011] Assuming that the relationship curve between stroke and time of the reverse thrust mobile outer cover under the actual test load working condition is consistent with the basic relationship curve between stroke and time, an initial relationship curve between load and time under the actual test load working condition is obtained according to the relationship curve between load and stroke and the basic relationship curve between stroke and time; a test load is applied to the reverse thrust mobile outer cover according to the initial relationship curve between load and time to perform a first reverse thrust opening and closing test, and a first time used by the reverse thrust mobile outer cover during the opening and closing process and a first relationship curve between stroke and time are obtained, assuming that the relationship curve between stroke and time of the reverse thrust mobile outer cover under the second actual test load working condition is consistent with the first relationship curve between stroke and time obtained by the first reverse thrust opening and closing test, a relationship curve between load and time under the second actual test load working condition is obtained according to the relationship curve between load and stroke and the first relationship curve between stroke and time, and a test load is applied to the reverse thrust mobile outer cover according to the relationship curve between load and time under the second actual test load working condition to perform a second reverse thrust opening and closing test, and a second time used by the reverse thrust mobile outer cover during the opening and closing process and a second relationship curve between stroke and time are obtained;

[0012] The above steps are repeated until the difference between the time used in the reverse opening and closing process of two adjacent reverse opening and closing tests is less than a set value, and the relationship curve between the stroke and time obtained in the last reverse opening and closing test is taken as the target relationship curve between the stroke and time of the reverse moving cover.

[0013] In some embodiments, further comprising: obtaining a target relationship curve between the load and time according to the target relationship curve between the stroke and time and the relationship curve between the load and the stroke.

[0014] In some embodiments, the set value ranges from 0.05s to 0.2s.

[0015] In some embodiments, applying the test load to the reverse moving cover to perform the reverse opening and closing test comprises applying the test load to the outer surface of the outer wall of the outer can of the reverse moving cover through the adhesive tape lever system.

[0016] In some embodiments, applying the test load to the outer surface of the outer wall of the outer can of the reverse moving cover through the adhesive tape lever system comprises equivalently applying the load of the outer wall plate of the reverse moving cover and the load of the blocker door to the outer surface of the outer wall of the outer can of the reverse moving cover.

[0017] In some embodiments, the adhesive tape lever system comprises a single-stage adhesive tape lever system, the single-stage adhesive tape lever system comprising a lever, two connectors respectively connected to two ends of the lever, and two adhesive tapes respectively connected to ends of the two connectors away from the lever and pasted on the outer surface of the outer wall of the outer can.

[0018] In some embodiments, applying the test load to the outer surface of the outer wall of the outer can of the reverse moving cover through the adhesive tape lever system comprises: arranging a plurality of loading points on the outer surface of the outer wall of the outer can of the reverse moving cover, and loading at each loading point by using the adhesive tape lever system.

[0019] In some embodiments, arranging a plurality of loading points on the outer surface of the outer wall of the outer can of the reverse moving cover comprises sequentially and spacedly arranging a plurality of loading points in the circumferential direction and the axial direction on the outer surface of the outer wall of the outer can of the reverse moving cover.

[0020] In some embodiments, during the opening and closing process of the reverse moving cover, the load pressure center applied to the moving cover is controlled by adjusting the magnitude of the force of each loading point in the plurality of loading points.

[0021] Based on the technical scheme provided in the application, the load test method of the reverse-moving outer cover comprises the following steps: establishing a reverse-moving outer cover aerodynamic model, and calculating the load borne by the reverse-moving outer cover at each stroke in the reverse-moving opening and closing process according to the aerodynamic model to obtain a relationship curve between the load and the stroke; in the no-load working condition, driving the reverse-moving outer cover to perform a reverse-moving opening and closing test to obtain a basic relationship curve between the stroke and the time of the reverse-moving opening and closing of the reverse-moving outer cover; assuming that the relationship curve between the stroke and the time of the reverse-moving outer cover in the actual test load working condition is consistent with the basic relationship curve between the stroke and the time, obtaining an initial relationship curve between the load and the time in the actual test load working condition according to the relationship curve between the load and the stroke and the basic relationship curve between the stroke and the time; applying a test load to the reverse-moving outer cover according to the initial relationship curve between the load and the time to perform a first reverse-moving opening and closing test, obtaining a first time used in the reverse-moving opening and closing process of the reverse-moving outer cover and a first relationship curve between the stroke and the time, assuming that the relationship curve between the stroke and the time of the reverse-moving outer cover in the second actual test load working condition is consistent with the first relationship curve between the stroke and the time obtained in the first reverse-moving opening and closing test, obtaining a relationship curve between the load and the time in the second actual test load working condition according to the relationship curve between the load and the stroke and the first relationship curve between the stroke and the time, and applying a test load to the reverse-moving outer cover according to the relationship curve between the load and the time in the second actual test load working condition to perform a second reverse-moving opening and closing test, and obtaining a second time used in the reverse-moving opening and closing process of the reverse-moving outer cover and a second relationship curve between the stroke and the time; repeating the above steps until the difference between the times used in the reverse-moving opening and closing processes of the adjacent two reverse-moving opening and closing tests is less than a set value, and taking the relationship curve between the stroke and the time obtained in the last reverse-moving opening and closing test as a target relationship curve between the stroke and the time of the reverse-moving outer cover.

[0022] Other features of the present application, and their advantages, will become apparent in the non-limiting detailed description of exemplary embodiments of the present application described below with reference made to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0024] Figure 1 It is a structural schematic view of the C-type cascade reverse thrust device.

[0025] Figure 2 It is a structural schematic view of the fixed structure of the C-type cascade reverse thrust device.

[0026] Figure 3 It is a structural schematic view of the C-type cascade reverse thrust device. Figure 2A-A direction cross-sectional view.

[0027] Figure 4 For Figure 2 B-B direction cross-sectional view.

[0028] Figure 5 For the structure diagram of the moving cover of the C cascade type thrust reverser.

[0029] Figure 6 For Figure 5 C-C direction cross-sectional view.

[0030] Figure 7 For Figure 5 D-D direction cross-sectional view.

[0031] Figure 8 For the structure diagram of the single half thrust reverser of the C cascade type thrust reverser.

[0032] Figure 9 For Figure 8 E-E direction cross-sectional view.

[0033] Figure 10 For the load test method of the thrust reverser moving cover of the embodiment.

[0034] Figure 11 For the relationship curve between the load and the stroke of the thrust reverser moving cover;

[0035] Figure 12 For the relationship curve between the stroke and the time of the thrust reverser moving cover under the empty load condition;

[0036] Figure 13 For the relationship curve between the load and the time of the thrust reverser moving cover under the empty load condition;

[0037] Figure 14 For the target relationship curve between the load and the time;

[0038] Figure 15 For the loading structure for applying the test load to the thrust reverser moving cover;

[0039] Figure 16 For Figure 15 Local enlarged structure diagram of M part. DETAILED DESCRIPTION

[0040] 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 following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0043] As mentioned above, because the driving oil pressure of the actuator cylinder of the hydraulic reverse thrust actuation system changes with the external load, the opening and closing time of the reverse thrust varies under different external loads when using the hydraulic reverse thrust actuation system to drive the reverse thrust. Therefore, it is difficult to directly obtain the opening and closing stroke and actual load of the movable cover at each time point under various working conditions. However, obtaining the opening and closing stroke and actual load at each time point is crucial for studying the reliability of the slide rail and groove interface of the movable cover.

[0044] The inventor of the present application has made an in-depth study on this problem, and proposes a load test method for reverse pushing a moving cover. Based on the stroke-time relationship curve measured under the no-load working condition, combined with the real load-stroke relationship curve, the real situation is approached through multiple test debugging, and finally the load-time relationship curve applicable to the reverse pushing of the moving cover is obtained, thereby providing load input for the reliability evaluation of the subsequent hydraulic reverse pushing actuating system and the moving structure rail and chute interface. The reliability evaluation of the moving structure rail and chute interface mentioned here can be simulation calculation or actual test.

[0045] Reference Figure 10 The embodiment of the present application provides a load test method for reverse pushing a moving cover, comprising the following steps:

[0046] S510, a gas dynamic model of the reverse pushing moving cover is established, and the load borne by the reverse pushing moving cover at each stroke in the reverse pushing opening and closing process is calculated and obtained according to the gas dynamic model to obtain a relationship curve between the load and the stroke. The relationship curve between the load and the stroke obtained through this step is as shown in FIG. 1. Figure 11

[0047] S520, under the no-load working condition, the reverse pushing moving cover is driven to perform a reverse pushing opening and closing test to obtain a basic relationship curve between the stroke and the time of the reverse pushing moving cover.

[0048] S530, assuming that the relationship curve between the stroke and the time of the reverse pushing moving cover under the actual test load working condition is consistent with the basic relationship curve between the stroke and the time, the initial relationship curve between the load and the time under the actual test load working condition is obtained according to the relationship curve between the load and the stroke and the basic relationship curve between the stroke and the time. According to the initial relationship curve between the load and the time, a test load is applied to the reverse pushing moving cover to perform a first reverse pushing opening and closing test, and a first time used by the reverse pushing moving cover in the reverse pushing opening and closing process and a first relationship curve between the stroke and the time are obtained. Assuming that the relationship curve between the stroke and the time of the reverse pushing moving cover under the second actual test load working condition is consistent with the first relationship curve between the stroke and the time obtained by the first reverse pushing opening and closing test, the relationship curve between the load and the time under the second actual test load working condition is obtained according to the relationship curve between the load and the stroke and the first relationship curve between the stroke and the time, and a test load is applied to the reverse pushing moving cover according to the relationship curve between the load and the time under the second actual test load working condition to perform a second reverse pushing opening and closing test, and a second time used by the reverse pushing moving cover in the reverse pushing opening and closing process and a second relationship curve between the stroke and the time are obtained.

[0049] ​S540, repeat the above steps until the difference between the time used in the two adjacent times of the reverse opening and closing process is less than the set value, and the stroke-time relationship curve obtained in the last reverse opening and closing test is the target stroke-time relationship curve of the reverse moving cover.

[0050] Since the time of the reverse opening and closing once under different external loads is not the same, it is difficult to directly obtain the opening and closing stroke of the reverse moving cover at each time point under various working conditions, so step S520 is needed to first perform the reverse opening and closing test under the no-load working condition, and the stroke-time relationship curve obtained under the no-load working condition is used as the basis. Figure 12 The basis relationship curve between the stroke and the time obtained under the no-load working condition is shown. The stroke value shown in the figure shows that the basis relationship curve refers to the stroke of the reverse moving cover in one opening and closing process, which refers to the total process of first retreating and then returning to the original position. And obtain the relationship curve between the load and the time under the no-load working condition. Figure 12

[0051] After obtaining the basis relationship curve between the stroke and the time under the no-load working condition, in step S530, it is assumed that the relationship curve between the stroke and the time under the actual test load working condition is consistent with the basis relationship curve between the stroke and the time under the no-load working condition, and then the relationship curve between the load and the time is further obtained according to the relationship curve between the load and the stroke obtained by S510, and then the relationship curve between the load and the time is used as the basis for applying the load during the first actual opening and closing test. The test load is set, the driving cylinder is driven to realize the reverse opening and closing to perform the first actual opening and closing test, and then the first time used by the reverse moving cover in the reverse opening and closing process and the first relationship curve between the stroke and the time are obtained.

[0052] The first time and the total time used in the opening and closing under the no-load working condition are quite different. In order to obtain the target relationship curve between the stroke and the time, multiple repeated tests are needed. In the second opening and closing test, the relationship curve between the load and the time under the second actual test load working condition is obtained according to the first relationship curve between the stroke and the time obtained in the first opening and closing test and the relationship curve between the load and the stroke obtained by S510, and then this is used as the basis for the second test load application. The test load is set, the driving cylinder is driven to realize the reverse opening and closing to perform the second actual opening and closing test, and then the second time used by the reverse moving cover in the reverse opening and closing process and the second relationship curve between the stroke and the time are obtained.

[0053] ​The above steps are repeatedly performed, and if the difference between the opening and closing times of two adjacent times of back-stepping is less than a set value, the test is ended, and the stroke-time relationship curve obtained in the last opening and closing test is taken as the target stroke-time relationship curve. The target stroke-time relationship curve obtained provides support for subsequent reliability evaluation of the sliding rail-slotted interface of the moving outer cover.

[0054] Further, the target load-time relationship curve close to the actual load-time relationship curve can be obtained by the target stroke-time relationship curve obtained and the relationship between the load and stroke obtained in S510. The target load-time relationship curve close to the actual load-time relationship curve obtained through the above steps is shown in FIG. 6. Figure 14

[0055] In some embodiments, the set value ranges from 0.05 s to 0.2 s. The set value range includes both boundary values of 0.05 s and 0.2 s. The set value in the above range makes the opening and closing times of two adjacent times of back-stepping very close, and thus a target load-time relationship curve closer to the actual load-time relationship curve is obtained.

[0056] In some embodiments, as shown in FIGS. 5 and 6, Figure 15 and Figure 16 applying the test load to the back-stepping moving outer cover to perform the back-stepping opening and closing test includes applying the test load to the outer surface of the outer wall 24 of the back-stepping moving outer cover through the adhesive tape lever system 30. That is, the aerodynamic load of the moving outer cover is equivalently applied to the back-stepping moving outer cover through the adhesive tape lever system 30, and the load on the moving mechanism airfoil is adjusted by the load of the adjusting cylinder at different opening and closing positions to ensure the accuracy of the load application.

[0057] In some embodiments, applying the test load to the outer surface of the outer wall of the back-stepping moving outer cover through the adhesive tape lever system includes equivalently applying the load of the outer wall plate of the back-stepping moving outer cover and the load of the blocker door to the outer surface of the outer wall of the back-stepping moving outer cover.

[0058] Specifically, the load of the outer wall plate of the moving outer cover is equivalently applied to the outer surface of the outer wall of the moving outer cover, which ensures that the relative deformation of the sliding rail-slotted interface is consistent with the actual loading condition as much as possible. In addition, the load on the blocker door is also equivalently applied to the outer surface of the outer wall of the moving outer cover. In summary, the load includes not only the load of the outer wall itself, but also the equivalent load of the outer wall plate and the blocker door.

[0059] In some embodiments, as shown in FIGS. 5 and 6, Figure 16 ​As shown, the test load is distributed and applied to the structure by the adhesive tape lever system, which can be designed as a multi-stage loading system according to actual needs. The single-stage adhesive tape lever system 30 includes a lever 31, two connecting pieces 32 connected to the two ends of the lever 31, and two adhesive tapes 33 connected to the ends of the two connecting pieces 32 away from the lever and pasted on the outer surface of the outer wall 24 of the outer can.

[0060] In some embodiments, applying the test load to the outer surface of the outer can wall of the movable outer cover by the adhesive tape lever system 30 includes: arranging a plurality of loading points on the outer surface of the outer can wall of the movable outer cover, and loading at each loading point by the adhesive tape lever system. Specifically, the load is applied by arranging a plurality of loading points on the outer surface of the outer can wall of the movable outer cover, each loading point is simulated by a long hanging actuator on the outer surface, and the change of the size and direction of the load during the opening and closing of the movable outer cover is realized by adjusting the size of the long hanging actuator load of each loading point. The load is finally distributed and applied to the outer surface of the outer can wall of the movable outer cover by the adhesive tape lever system.

[0061] The actual load pressure on the movable outer cover during the opening and closing of the movable outer cover is ensured by adjusting the size of the force of each loading point.

[0062] In some embodiments, arranging a plurality of loading points on the outer surface of the outer can wall of the movable outer cover includes sequentially arranging a plurality of loading points on the outer surface of the outer can wall of the movable outer cover in the circumferential direction and the axial direction.

[0063] As shown, the plurality of loading points are arranged on the outer surface of the outer can wall of the movable outer cover in the circumferential direction and also arranged in the axial direction. Figure 15

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.​

Claims

1. A load testing method of a pushback mobile cover, characterized by, The method comprises the following steps: a step of establishing a reverse thrust moving fairing aerodynamic model and calculating the load borne by the reverse thrust moving fairing at each stroke during the opening and closing of the reverse thrust according to the aerodynamic model to obtain a load-stroke relationship curve; a step of driving the reverse thrust moving fairing to perform a reverse thrust opening and closing test under a no-load condition to obtain a basic stroke-time relationship curve of the reverse thrust moving fairing during the opening and closing of the reverse thrust; a step of assuming that the stroke-time relationship curve of the reverse thrust moving fairing under an actual test load condition is consistent with the basic stroke-time relationship curve, and obtaining an initial load-time relationship curve under the actual test load condition according to the load-stroke relationship curve and the basic stroke-time relationship curve; a step of applying a test load to the reverse thrust moving fairing according to the initial load-time relationship curve to perform a first reverse thrust opening and closing test, obtaining a first time used by the reverse thrust moving fairing during the opening and closing of the reverse thrust and a first stroke-time relationship curve, assuming that the stroke-time relationship curve of the reverse thrust moving fairing under a second actual test load condition is consistent with the first stroke-time relationship curve obtained by the first reverse thrust opening and closing test, obtaining a load-time relationship curve under the second actual test load condition according to the load-stroke relationship curve and the first stroke-time relationship curve, and applying the test load to the outer surface of the outer wall of the bypass outer wall of the reverse thrust moving fairing through a rubber belt lever system to perform a second reverse thrust opening and closing test according to the load-time relationship curve under the second actual test load condition, and obtaining a second time used by the reverse thrust moving fairing during the opening and closing of the reverse thrust and a second stroke-time relationship curve; a step of repeating the above steps until the difference between the times used by the reverse thrust moving fairing during the opening and closing of the reverse thrust in two adjacent reverse thrust opening and closing tests is less than a set value, and taking the stroke-time relationship curve obtained by the last reverse thrust opening and closing test as a target stroke-time relationship curve of the reverse thrust moving fairing.

2. The pushback mobile cover load testing method of claim 1, wherein, The method further comprises: a step of obtaining a target load-time relationship curve according to the target stroke-time relationship curve and the load-stroke relationship curve.

3. The pushback travel cover load test method of claim 1, wherein, The set value ranges from 0.05 s to 0.2 s.

4. The pushback travel cover load test method of claim 1, wherein, The step of applying the test load to the outer surface of the outer wall of the bypass outer wall of the reverse thrust moving fairing through the rubber belt lever system comprises equivalently applying the load of the reverse thrust moving fairing outer wall plate and the load of the blocker door to the outer surface of the outer wall of the bypass outer wall of the reverse thrust moving fairing.

5. The pushback travel cover load test method of claim 1, wherein, The rubber belt lever system comprises a single-stage rubber belt lever system, the single-stage rubber belt lever system comprises a lever, two connectors and two rubber belts, the two connectors are connected to the two ends of the lever respectively, and the two rubber belts are connected to the ends of the two connectors away from the lever and are pasted on the outer surface of the outer wall of the bypass.

6. The pushback travel cover load test method of claim 1, wherein, The step of applying the test load to the outer surface of the outer wall of the bypass outer wall of the reverse thrust moving fairing through the rubber belt lever system comprises arranging a plurality of loading points on the outer surface of the outer wall of the bypass outer wall of the reverse thrust moving fairing, and loading at each loading point by using a rubber belt lever system.

7. The pushback travel cover load test method of claim 6, wherein, The multiple loading points are arranged on the outer surface of the outer wall of the outer can of the movable outer cover in the circumferential direction and the axial direction.

8. The pushback travel cover load test method of claim 6, wherein, During the opening and closing of the movable outer cover, the load pressure center borne by the movable outer cover is controlled by adjusting the magnitude of the force of each loading point in the multiple loading points.

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