Jet field testing device and method for airplane tire explosion

Abstract

The invention discloses a jet flow field testing device and method for airplane tire explosion. The device comprises a jet flow opening sealing assembly, a reinforcing assembly, a detonation power assembly, a perforated tire and a piezoelectric sensor array. The perforated tire is used for providing a burst tire for generating a jet flow field; the jet orifice sealing assembly is used for constructing a jet orifice and a jet channel to form a jet field required by a test; the reinforcing assembly is connected with the jet orifice sealing assembly and the perforated tire, and is used for providing a channel for gas in the tire body to flow towards the jet orifice of the tire body; the deflagration power assembly is connected with the connecting jet flow opening sealing assembly and used for providing deflagration power needed by a jet flow field for generating airplane tire explosion; the piezoelectric sensor array is used for measuring the pressure distribution of a jet flow field of aircraft tire explosion, and is arranged in the distribution range of the jet flow field.

Description

Technical Field

[0001] The invention relates to the field of aircraft tire testing and industrial data processing, and in particular to a jet field testing device and method for aircraft tire explosion. Background Art

[0002] Aircraft tires are generally filled with nitrogen. Information such as tire pressure and temperature is crucial to aircraft safety. Appropriate tire pressure can improve aircraft landing performance and reduce unsafe risks during landing. At the same time, it can reduce aircraft tire wear, increase tire service life, and reduce aircraft operating costs. Long-term excessive tire pressure will lead to the risk of tire blowout. At the same time, the jet field generated during the tire blowout lasts for a short time and the process is violent, which brings great difficulties to its measurement process. The jet field has a great safety impact on the surrounding environment, and it is of great significance to accurately measure it.

[0003] Existing aircraft tire burst measurements mainly use recorders to measure tire pressure. The measurement method is relatively simple and can only detect tire pressure changes, but cannot achieve fast and accurate measurement of the jet field. Summary of the invention

[0004] The invention mainly solves the problem of how to realize rapid and accurate measurement of the jet field of aircraft tire explosion. The invention discloses a jet field testing device for aircraft tire explosion.

[0005] In a first aspect of an embodiment of the present invention, a jet field test device for aircraft tire explosion is disclosed, comprising: a jet port sealing component, a reinforcement component, a deflagration power component, an open-hole tire, and a piezoelectric sensor array;

[0006] The perforated tire is used to provide a burst tire that generates a jet field;

[0007] The jet port sealing assembly is used to construct the jet port and the jet channel to form the jet field required for the test;

[0008] The reinforcing component is connected to the jet port sealing component and the open-hole tire, and is used to provide a channel for the flow of the jet of gas in the tire body to the tire body;

[0009] The deflagration power assembly is connected to the jet port sealing assembly and is used to provide the deflagration power required to generate the jet field for bursting the aircraft tire;

[0010] The piezoelectric sensor array is arranged within the distribution range of the jet field and is used to measure the pressure distribution of the jet field when the aircraft tire explodes.

[0011] The perforated tire comprises: a tire body, jet holes and bolt holes; the bolt holes and jet holes are hole-like structures evenly distributed on the circumference of the tire body; the tire body is a circumferential structure composed of hollow rubber; the axis of the jet holes is parallel to the axis of the bolt holes.

[0012] The number n of the bolt holes satisfies the first constraint condition; the expression of the first constraint condition is:

[0013] Fz=73.2+n×7.32,

[0014] Among them, Fz is the preset total reinforcement force value.

[0015] The reinforcement assembly includes: an inner reinforcement plate, an outer reinforcement plate with a jet hole sealing ring, a bolt group, a bowl-shaped pressure ring, a flat pressure ring, and a sealant;

[0016] The inner reinforcing plate is a metal curved plate that is attached to the inner tread of the tire body. A plurality of bolt holes are formed on the curved plate. The inner reinforcing plate is used to bear the tightening force of the bolt group and provide a channel for the gas inside the tire body to flow to the jet holes of the tire body; it has an obstructive effect on the flow of the gas inside the tire body to the lower edges of the bolt holes.

[0017] The outer reinforcing plate is a metal curved plate that fits the outer surface of the tire body. The curved plate is provided with a plurality of bolt holes. The outer reinforcing plate cooperates with the inner reinforcing plate and the tire body to form a position for fixing the bolt group; bears the tightening force of the bolt group; provides an installation position for the bowl-shaped pressure ring and applies a clamping force to the bowl bottom of the bowl-shaped pressure ring; provides an installation position for the jet hole sealing ring and applies a clamping force to the jet hole sealing ring; cooperates with the jet hole of the tire body to provide a channel for the jet; and provides an assembly position for the base of the jet port sealing assembly;

[0018] The jet port sealing assembly base and the jet hole sealing ring are respectively installed on the upper surface and the lower surface of the outer reinforcing plate.

[0019] The jet port sealing assembly comprises a lower cover plate, a plate valve, a base, an upper cover plate, a seal and a fastener; the seal is arranged between the upper cover plate and the lower cover plate, and is used to seal the jet channel between the upper cover plate and the lower cover plate; the fastener is used to fasten and connect the lower cover plate, the upper cover plate and the plate valve; the base is used to connect the jet port sealing assembly with the reinforcement assembly;

[0020] The upper cover plate and the lower cover plate are annular structures; the middle channel of the annular structure of the upper cover plate is the upper part of the jet channel; the middle channel of the annular structure of the lower cover plate is the lower part of the jet channel;

[0021] The jet port sealing component is configured by arranging a plate valve between the jet channels of the upper cover plate and the lower cover plate. When the tire body is inflated, the plate valve seals the jet channel thereunder to meet the pressure inflation requirement. When a jet needs to be generated, the deflagration power component connected to the plate valve is started to open the plate valve to open the jet port. The high-pressure gas under the plate valve is ejected through the channel on the upper cover plate to form a jet field required for the test.

[0022] The length of the plate valve is obtained according to a first length calculation model; the expression of the first length calculation model is:

[0023] L1=0.5D2+(4~5)mm,

[0024] Wherein, D2 is the outer diameter of the O-type sealing ring around the jet port, and the increased 4 to 5 mm is for the edge of the plate valve to reliably compress the sealing ring; the sealing member is an O-type sealing ring;

[0025] The diameter D1 of the jet channel of the lower cover plate is obtained according to the second length calculation model; the expression of the second length calculation model is:

[0026] D1=d+(H+h1-h)tan19°,

[0027] Among them, d is the diameter of the jet hole on the outer reinforcing plate, H is the thickness of the disc of the lower cover plate, h1 is the distance between the lower bottom surface of the disc of the lower cover plate and the upper surface of the outer reinforcing plate, and h is the depth of the plate valve slide groove.

[0028] The outer diameter D2 of the outer circle of the O-type sealing ring around the jet port is obtained according to the third length calculation model; the expression of the third length calculation model is:

[0029] D2=D1+2(b1+b2),

[0030] Wherein, b1 is the difference between the radius of the jet port and the inner radius of the O-type sealing ring around it; b2 is the radial width of the O-type sealing ring around the jet port.

[0031] The jet channel of the upper cover plate is a tapered hole whose cross-sectional area gradually increases from bottom to top; the tapered hole and the jet channel of the lower cover plate are on the same axis, and the diameter D3 of the smallest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is:

[0032] D3=D1+2h×tan19°,

[0033] Wherein, D3 is the diameter of the smallest cross-sectional circle of the tapered hole;

[0034] The diameter D4 of the largest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is:

[0035] D4=D3+2H×tan19°,

[0036] Wherein, D4 is the diameter of the largest cross-sectional circle of the tapered hole.

[0037] The deflagration power assembly comprises: a power cylinder, a piston rod, a fireproof sealing ring, a sealing ring, a baffle, gunpowder, a wire, a piston and a leakage hole;

[0038] The power cylinder is the outer shell of the deflagration power assembly, and a piston rod is arranged in the circular hole-shaped structure at the front end thereof; the first end of the piston rod is in contact with the plate valve, and the second end of the piston rod is inserted into the piston; the piston is arranged at the end of the internal space of the power cylinder; a baffle is arranged at a position adjacent to the inserted piston part of the second end of the piston rod, and gunpowder is arranged in the closed space formed by the baffle and the piston, the first end of the wire passes through the piston and extends into the gunpowder, and the second end of the wire extends to the outside of the power cylinder; a fire-proof sealing ring is arranged on the part of the baffle that contacts the inner wall of the power cylinder; a closed sealing ring is arranged on the part of the piston that contacts the inner wall of the power cylinder; a leakage hole is provided on the cylinder wall at the rear of the power cylinder for gas leakage at the end stage of the piston stroke to reduce the movement speed of the piston.

[0039] The piezoelectric sensor array includes a plurality of piezoelectric sensors and a data processing module;

[0040] The data processing module is connected to each piezoelectric sensor and is used to perform filtering and fusion processing on the piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors to obtain jet field information.

[0041] The beneficial effects of the present invention are:

[0042] The present invention discloses a jet field test device for aircraft tire explosion, which solves the problem of rapid and accurate measurement of the jet field of aircraft tire explosion. When designing the dimensions of each structural component of the jet field test device, the present invention realizes accurate matching of the structural dimensions by introducing various length calculation models.

[0043] When processing the measured piezoelectric data sequence, the present invention utilizes all piezoelectric data sequences and piezoelectric sensor positions to construct a measurement data set; a pattern matching model is constructed for the measurement data set, and the field distribution of the measurement data is extracted through the model, thereby achieving rapid and accurate modeling of the jet field. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 1 is a flow chart for implementing the method of the present invention;

[0045] Figure 2 The jet flow field testing device for aircraft tire explosion of the present invention;

[0046] Figure 3 is a schematic diagram of an inner reinforcement plate of the present invention;

[0047] Figure 4 is a schematic diagram of an outer reinforcement plate of the present invention;

[0048] Figure 5 It is a schematic diagram of the jet port sealing assembly of the present invention;

[0049] Figure 6 It is a schematic diagram of the composition of the deflagration power assembly of the present invention. DETAILED DESCRIPTION

[0050] In order to better understand the content of the present invention, an embodiment is given here.

[0051] Figure 1 1 is a flow chart for implementing the method of the present invention; Figure 2 The jet flow field testing device for aircraft tire explosion of the present invention; Figure 3 is a schematic diagram of an inner reinforcement plate of the present invention; Figure 4 is a schematic diagram of an outer reinforcement plate of the present invention; Figure 5 It is a schematic diagram of the jet port sealing assembly of the present invention; Figure 6 It is a schematic diagram of the composition of the deflagration power assembly of the present invention.

[0052] In a first aspect of the embodiments of the present invention, a jet field testing device for aircraft tire explosion is disclosed, such as Figure 2 As shown, it includes: a jet port sealing component 1, a reinforcement component 2, a deflagration power component 3, a perforated tire 4 and a piezoelectric sensor array.

[0053] The perforated tire is used to provide a burst tire that generates a jet field;

[0054] The jet port sealing assembly is used to construct the jet port and the jet channel to form the jet field required for the test;

[0055] The reinforcing component is connected to the jet port sealing component and the perforated tire, and is used to provide a channel for the gas inside the tire body to flow to the jet port of the tire body;

[0056] The deflagration power assembly is connected to the jet port sealing assembly and is used to provide the deflagration power required to generate the jet field for bursting the aircraft tire;

[0057] The piezoelectric sensor array is used to measure the pressure distribution of the jet field when the aircraft tire explodes, and is arranged within the distribution range of the jet field.

[0058] The perforated tire comprises: a tire body, jet holes and bolt holes; the bolt holes and jet holes are hole-shaped structures evenly distributed on the circumference of the tire body; the tire body is a circumferential structure composed of hollow rubber;

[0059] The axis of the jet hole is parallel to the axis of the bolt hole;

[0060] The number n of the bolt holes satisfies the first constraint condition; the expression of the first constraint condition is:

[0061] Fz=73.2+n×7.32,

[0062] Among them, Fz is the preset total reinforcement force value, and its value can be 102.48.

[0063] The reinforcement assembly includes: an inner reinforcement plate, an outer reinforcement plate with a jet hole sealing ring, a bolt group, and a bowl-shaped pressure ring.

[0064] The inner reinforcing plate is a metal curved plate that fits the inner tread of the tire body. The curved plate is provided with a plurality of bolt holes, such as Figure 3 As shown, the inner reinforcing plate is used to bear the tightening force of the bolt group; prevent the inner tread of the tire body from directly contacting the bolt group; provide a channel for the gas inside the tire body to flow to the jet holes of the tire body; and hinder the flow of the gas inside the tire body to the lower edges of each bolt hole.

[0065] The outer reinforcing plate is a metal curved plate that fits the outer surface of the tire body and has a plurality of bolt holes. Figure 4 As shown, the outer reinforcing plate cooperates with the inner reinforcing plate and the tire body to form a position for fixing the bolt group; bears the tightening force of the bolt group; provides an installation position for the bowl-shaped pressure ring and applies a clamping force to the bowl bottom of the bowl-shaped pressure ring; provides an installation position for the jet hole sealing ring and applies a clamping force to the jet hole sealing ring; cooperates with the jet hole of the tire body to provide a channel for the jet; and provides an assembly position for the base of the jet port sealing component.

[0066] The jet port sealing assembly base and the jet hole sealing ring are respectively installed on the upper surface and the lower surface of the outer reinforcing plate.

[0067] The bolt assembly comprises bolts and nuts;

[0068] The jet port sealing component, such as Figure 5 As shown, including the lower cover (such as Figure 5 Gray parts shown in Figure 5 The light green parts shown in the figure), the base, the upper cover (as shown in the figure Figure 5 The light yellow parts shown in Figure ), seals and fasteners ( Figure 5 Only the holes for fastener installation are shown in the figure). The sealing member is arranged between the upper cover plate and the lower cover plate, and is used to seal the jet channel between the upper cover plate and the lower cover plate. The fastener is used to fasten and connect the lower cover plate, the upper cover plate and the plate valve. The base is used to connect the jet port sealing component with the reinforcement component;

[0069] The upper cover plate and the lower cover plate are annular structures; the middle channel of the annular structure of the upper cover plate is a jet channel; the middle channel of the annular structure of the lower cover plate is a jet channel;

[0070] The function of the jet port sealing assembly is: by arranging a plate valve between the jet channels of the upper cover plate and the lower cover plate, when the tire body is inflated, the plate valve seals the jet channel thereunder to meet the pressure requirement; when a jet needs to be generated, the deflagration power assembly (such as Figure 5 The dark green and orange components connected to both ends of this component are shown), and the plate valve is quickly pulled open to open the jet port. The high-pressure gas under the plate valve is ejected through the channel on the upper cover plate to form the jet field required for the test.

[0071] The fastener may be a bolt structure; the sealing member may be made of rubber.

[0072] The length of the plate valve is obtained according to a first length calculation model; the expression of the first length calculation model is:

[0073] L1=0.5D2+(4~5)mm,

[0074] Wherein, D2 is the outer diameter of the O-type sealing ring around the jet port, and the increased 4 to 5 mm is for the edge of the plate valve to reliably compress the sealing ring; the sealing member is an O-type sealing ring;

[0075] The diameter D1 of the jet channel of the lower cover plate is obtained according to the second length calculation model; the expression of the second length calculation model is:

[0076] D1=d+(H+h1-h)tan19°,

[0077] Among them, d is the diameter of the jet hole on the outer reinforcing plate, H is the thickness of the disc of the lower cover plate, h1 is the distance between the lower bottom surface of the disc of the lower cover plate and the upper surface of the outer reinforcing plate, and h is the depth of the plate valve slide groove.

[0078] The outer diameter D2 of the outer circle of the O-type sealing ring around the jet port is obtained according to the third length calculation model; the expression of the third length calculation model is:

[0079] D2=D1+2(b1+b2),

[0080] Among them, b1 is the difference between the radius of the jet port and the inner radius of the O-ring around it, which is generally taken as 1.2mm~2mm; b2 is the radial width of the O-ring around the jet port, which is selected according to the size of the sealing ring and referenced to relevant standards.

[0081] The jet channel of the upper cover plate is a tapered hole with a gradually increasing cross-sectional area from bottom to top. The tapered hole and the jet channel of the lower cover plate are on the same axis, and the diameter D3 of the smallest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is:

[0082] D3=D1+2h×tan19°,

[0083] Wherein, D3 is the diameter of the smallest cross-sectional circle of the tapered hole.

[0084] The diameter D4 of the largest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is:

[0085] D4=D3+2H×tan19°,

[0086] Wherein, D4 is the diameter of the largest cross-sectional circle of the tapered hole.

[0087] The deflagration power assembly comprises: a power cylinder, a piston rod, a fireproof sealing ring, a sealing ring, a baffle, gunpowder, a wire, a piston and a leakage hole;

[0088] The power cylinder is the outer shell of the deflagration power assembly, and a piston rod is arranged in the circular hole-shaped structure at the front end thereof; the first end of the piston rod is in contact with the plate valve, and the second end of the piston rod is inserted into the piston; the piston is arranged at the end of the internal space of the power cylinder; a baffle is arranged at a position adjacent to the part of the second end of the piston rod inserted into the piston, and gunpowder is arranged in the closed space formed by the baffle and the piston, the first end of the wire passes through the piston and extends into the gunpowder, and the second end of the wire extends to the outside of the power cylinder; a fire-proof sealing ring is arranged on the part of the baffle in contact with the inner wall of the power cylinder; a closed sealing ring is arranged on the part of the piston in contact with the inner wall of the power cylinder; a leakage hole is provided on the cylinder wall at the rear of the power cylinder for gas leakage at the end stage of the piston stroke to reduce the movement speed of the piston.

[0089] The piezoelectric sensor array includes a plurality of piezoelectric sensors and a data processing module;

[0090] The data processing module is connected to each piezoelectric sensor and is used to perform filtering and fusion processing on the piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors to obtain jet field information;

[0091] The piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors are filtered and fused to obtain jet field information, including

[0092] S201, constructing a measurement data set using all piezoelectric data sequences and piezoelectric sensor positions;

[0093] S202, for each type of data set in the measurement data set, using the data sequence of each type of data set in the data set as a row vector, constructing an approximation matrix; using the data acquisition information of each type of data sequence in the data set, constructing an acquisition matrix; the row vector of the acquisition matrix is ​​the data acquisition information of a type of data sequence; using the approximation matrix as a dependent variable and the acquisition matrix as an independent variable, constructing a pattern matching model;

[0094] S203, solving the pattern matching model to obtain a matching model for each type of data set; the matching model is expressed as f(x)=xA, where x is an acquisition matrix of the input of the matching model, and matrix A is obtained by solving the pattern matching model;

[0095] S204, using the matching model of each type of data set, calculating and processing the data collection information of the data sequence of the corresponding type of data set to obtain a solution matrix;

[0096] S205, subtracting each data in the solution matrix from the data in the approximation matrix corresponding to the same row and column as the data in the solution matrix, and calculating the absolute value to obtain a difference value of the data;

[0097] S206, deleting the data whose difference value is greater than a set difference threshold from the measurement data set;

[0098] S207, executing S202 to S206 for all types of data sets in the measurement data set to obtain jet field information.

[0099] The pattern matching model is expressed as follows:

[0100] min|vA-R|,

[0101] subject to AA T =I A,

[0102] Among them, I A represents the identity matrix with the row dimension of matrix A as the dimension, matrix A represents the matrix to be solved, v represents the acquisition matrix, and R represents the approximation matrix;

[0103] The algorithm for solving the pattern matching model may adopt a genetic algorithm and a particle filter algorithm;

[0104] The data collection information includes collection time information or collection location information;

[0105] For the deployment of the piezoelectric sensor array, based on the geometric shape of the tire blasting jet field and the axial symmetry of the pressure distribution, following the principle that "at any distance from the top of the cone, any busbar forms an 'isobaric circle' on the cross section perpendicular to the axis of the conical jet field", the sensors at different front and rear positions on the cone surface formed by the same busbar are cross-arranged on the truncated circles at different distances. This can avoid mutual interference between the front and rear sensors, reduce the interference of the sensor array on the jet free field, and perform a three-dimensional test on the pressure distribution characteristics of the jet free field, overcoming the disadvantage of arranging sensors on only one plane.

[0106] The design parameters of the inner reinforcement plate mainly include two parts: manufacturing material parameters and structural parameters. Among them, the manufacturing material parameters mainly refer to the material and its heat treatment process; the structural parameters mainly include; the shape of the plate, the length, width and thickness of the plate, the size of the jet channel, the diameter of the bolt hole, and the size of the countersunk hole on the bottom surface below the bolt hole that is perpendicular to the bolt axis.

[0107] According to the function of the inner reinforcement plate, 45# quenched and tempered steel is selected as the manufacturing material. The shape of the inner reinforcement plate is designed as a square curved plate. The upper and lower surfaces are made into curved surfaces by flat plate compression molding, and the four corners and eight edges are ground and rounded. The shape of the inner reinforcement plate must meet the following requirements: closely fit with the inner tire surface, and there are no convex points, sharp edges and sharp angles on the surface fitting with the inner tire surface; the lower surface can be a plane to facilitate the production of countersunk holes, or it can be a curved surface similar to the upper surface to facilitate the compression molding of the entire inner reinforcement plate. In order to ensure the smooth flow of the gas jet and consider the upper and lower coordination with the jet hole sealing ring, the diameter of the jet hole on the inner reinforcement plate is taken as 75mm.

[0108] In addition to meeting the strength requirements, the thickness of the inner reinforcement plate must also consider the needs of countersink production. Because the lower surface of the inner reinforcement plate is also a curved surface, and the curvature of the surface corresponding to the bolt holes at different positions is different, therefore, the countersinks with the same minimum depth have different requirements for plate thickness when made at different hole positions. If only the strength requirements and the convenience of compression molding are considered, the plate thickness is preferably 6mm; but after calculation and trial processing, 6mm does not meet the needs of countersink production, so the plate thickness is designed to be 10mm. When the countersink diameter is 15mm and its minimum depth is 0.5mm, it can be guaranteed that the plate thickness at the maximum depth of the countersink is still not less than 3mm. Taking into account the width of the inner tread and the position of the bolt hole, its length and width are both equal to 220mm. The number and position of the bolt holes on the inner reinforcement plate are the same as those on the carcass, but the diameter of the bolt holes needs to be larger than the diameter of the bolt holes on the carcass, because the bolt holes on the carcass will undergo elastic deformation during assembly and increase to 10mm. In order to ensure the smooth assembly of the bolt assembly with a diameter of 10mm with an outer tube, the diameter of the bolt holes on the inner reinforcement plate is taken as 10.2mm.

[0109] Similar to the inner reinforcement plate, the design parameters of the outer reinforcement plate also mainly include two parts: manufacturing material parameters and structural parameters. However, its structural parameters are more complicated than those of the inner reinforcement plate. In addition to the shape of the plate, the length, width and thickness of the plate, the jet channel, the bolt hole, and the countersunk hole around the hole below the bolt hole with the bottom surface perpendicular to the bolt axis, there are also the installation position of the carcass jet hole sealing ring and the installation position of the jet port sealing assembly base.

[0110] The plate valve is a kind of sliding valve. According to the driving force of closing and opening the plate valve, the plate valve can generally be divided into hydraulic, electric and electromagnetic types. Among them, the electromagnetic plate valve has the highest opening speed, but it still takes more than 100ms to open the jet port involved here, which cannot meet the requirement that the opening time of the cone making device is not more than 5ms. Therefore, this device uses a plate valve driven by explosion power. In addition to connecting the piston and the piston rod with the plate valve to transmit power, the explosion power device also needs to be fixed to the jet port sealing component through the clamping action of the upper and lower cover plates. When the explosion power device is started to drive the plate valve, the sealing component will be subjected to a very strong impact. This impact force acts on the outer reinforcement plate through the lower cover plate. Since the direction of the impact force is perpendicular to the axis of the reinforcement bolt group and the radius of the tire, it is equivalent to applying a huge shear force to the bolt group and a torque to the tire, resulting in two possible results: one is to cause the tire to rotate, and the other is to cut off the bolt or deform the tire body bolt hole.

[0111] Tire rotation is not allowed in the test, because once it rotates, the direction of the jet will change, and the jet load cannot be applied to the specimen. However, if the tire is forcibly fixed to prevent it from rotating, the second result is difficult to avoid, and all the aforementioned reinforcement measures will fail. Therefore, the negative impact of the impact force must be overcome.

[0112] According to the main function of the lower cover plate, its overall structure is designed as a disc-like part with an ear plate and a boss base. A through hole is opened in the central part of the disc to form a jet channel. The lower part of the through hole is an external threaded pipe structure to match the internal threaded pipe on the outer reinforcing plate. "Three grooves" and "three holes" are made on the disc surface and the ear plate surface above the through hole. "Three grooves" refer to: sealing ring grooves, plate valve slide grooves and power device installation grooves; "three holes" refer to: a row of light holes for screw installation made on the symmetrical axis in the width direction of the ear plate, so that the power device can be fixed on the ear plate with screws; two positioning holes when assembling the upper and lower cover plates are set on the disc diameter perpendicular to the symmetrical axis in the width direction of the ear plate; light holes for screw installation are made symmetrically on both sides of each positioning hole, so that the upper and lower cover plates and the plate valve can be fastened and combined with screws.

[0113] According to the overall structural characteristics of the lower cover, the following characteristic dimensions are defined: the diameter and thickness of the disc, the total length, width and thickness of the ear plate, the depth and width of the "three grooves", the position and aperture of the "three holes", the inner diameter, outer diameter and height of the external threaded tube, and the maximum external dimension of the part measured in the axial direction of the disc, which is called the total height. Among them, the total height, the diameter of the disc and the total length of the ear plate are the overall dimensions of the part, and the rest are local dimensions.

[0114] The second aspect of the present invention discloses a jet field testing device for aircraft tire explosion, the device comprising:

[0115] A memory storing executable program code;

[0116] a processor coupled to the memory;

[0117] The processor calls the executable program code stored in the memory to execute the jet field test method for aircraft tire explosion.

[0118] The third aspect of the present invention discloses a computer storable medium storing computer instructions, which are used to execute the jet field test method for aircraft tire explosion when called by a computer.

[0119] According to a fourth aspect of the present invention, an information data processing terminal is disclosed. The information data processing terminal is used to implement the jet field test method for aircraft tire explosion.

[0120] The fifth aspect of the present invention discloses a jet field test method for aircraft tire explosion, which is implemented by using the jet field test device for aircraft tire explosion, and includes:

[0121] Using the perforated tire, a burst tire generating a jet field is provided;

[0122] The jet orifice sealing assembly is used to construct a jet orifice and a jet channel to form a jet field required for the test;

[0123] The reinforcing assembly is used to provide a channel for the flow of the jet of the tire gas in the tire body toward the tire body;

[0124] The deflagration power assembly is used to provide the deflagration power required to generate a jet field for bursting aircraft tires;

[0125] The piezoelectric sensor array is used to measure the pressure distribution of the jet field when the aircraft tire explodes.

[0126] The method of measuring the pressure distribution of the jet field of the aircraft tire explosion by using the piezoelectric sensor array includes:

[0127] Using a piezoelectric sensor array, filtering and fusing the piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors to obtain jet field information; the jet field information is used to characterize the pressure distribution of the jet field of an aircraft tire explosion;

[0128] The filtering and fusing of the piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors to obtain the jet field information includes:

[0129] S201, constructing a measurement data set using all piezoelectric data sequences and piezoelectric sensor positions;

[0130] S202, for each type of data set in the measurement data set, using the data sequence of each type of data set in the data set as a row vector, constructing an approximation matrix; using the data acquisition information of each type of data sequence in the data set, constructing an acquisition matrix; the row vector of the acquisition matrix is ​​the data acquisition information of a type of data sequence; using the approximation matrix as a dependent variable and the acquisition matrix as an independent variable, constructing a pattern matching model;

[0131] S203, solving the pattern matching model to obtain a matching model for each type of data set; the expression of the matching model is f(x)=xA, x is the acquisition matrix of the input of the matching model, and the matrix A is obtained by solving the pattern matching model;

[0132] S204, using the matching model of each type of data set, calculating and processing the data collection information of the data sequence of the corresponding type of data set to obtain a solution matrix;

[0133] S205, subtracting each data in the solution matrix from the data in the approximation matrix corresponding to the same row and column as the data in the solution matrix, and calculating the absolute value to obtain a difference value of the data;

[0134] S206, deleting the data whose difference value is greater than a set difference threshold from the measurement data set;

[0135] S207, executing S202 to S206 for all types of data sets in the measurement data set to obtain jet field information.

[0136] The pattern matching model is expressed as follows:

[0137] min|vA-R|,

[0138] subject toAA T =I A

[0139] Among them, I A represents the identity matrix with the row dimension of matrix A as the dimension, matrix A represents the matrix to be solved, v represents the acquisition matrix, and R represents the approximation matrix;

[0140] The algorithm for solving the pattern matching model may adopt a genetic algorithm and a particle filter algorithm;

[0141] The data collection information includes collection time information or collection location information;

[0142] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A jet field test device for aircraft tire explosion, characterized in that: include: Jet port sealing assembly, reinforcement assembly, deflagration power assembly, perforated tire and piezoelectric sensor array; The perforated tire is used to provide a burst tire that generates a jet field; The jet port sealing assembly is used to construct the jet port and the jet channel to form the jet field required for the test; The reinforcing component is connected to the jet port sealing component and the open-hole tire, and is used to provide a channel for the flow of the jet of gas in the tire body to the tire body; The deflagration power assembly is connected to the jet port sealing assembly and is used to provide the deflagration power required to generate the jet field for bursting the aircraft tire; The piezoelectric sensor array is arranged within the distribution range of the jet field and is used to measure the pressure distribution of the jet field when the aircraft tire explodes.

2. The jet flow field testing device for aircraft tire explosion according to claim 1, characterized in that: The perforated tire comprises: a tire body, jet holes and bolt holes; the bolt holes and jet holes are hole-like structures evenly distributed on the circumference of the tire body; the tire body is a circumferential structure composed of hollow rubber; the axis of the jet holes is parallel to the axis of the bolt holes.

3. The jet flow field testing device for aircraft tire explosion according to claim 2, characterized in that: The number n of the bolt holes satisfies the first constraint condition; the expression of the first constraint condition is: Fz=73.2+n×7.32, Among them, Fz is the preset total reinforcement force value.

4. The jet flow field testing device for aircraft tire explosion according to claim 2, characterized in that: The reinforcement assembly includes: an inner reinforcement plate, an outer reinforcement plate with a jet hole sealing ring, a bolt group, a bowl-shaped pressure ring, a flat pressure ring, and a sealant; The inner reinforcing plate is a metal curved plate that is attached to the inner tread of the tire body. A plurality of bolt holes are formed on the curved plate. The inner reinforcing plate is used to bear the tightening force of the bolt group and provide a channel for the gas inside the tire body to flow to the jet holes of the tire body; it has an obstructive effect on the flow of the gas inside the tire body to the lower edges of the bolt holes. The outer reinforcing plate is a metal curved plate that fits the outer surface of the tire body. The curved plate is provided with a plurality of bolt holes. The outer reinforcing plate cooperates with the inner reinforcing plate and the tire body to form a position for fixing the bolt group; bears the tightening force of the bolt group; provides an installation position for the bowl-shaped pressure ring and applies a clamping force to the bowl bottom of the bowl-shaped pressure ring; provides an installation position for the jet hole sealing ring and applies a clamping force to the jet hole sealing ring; cooperates with the jet hole of the tire body to provide a channel for the jet; and provides an assembly position for the base of the jet port sealing assembly; The jet port sealing assembly base and the jet hole sealing ring are respectively installed on the upper surface and the lower surface of the outer reinforcing plate.

5. The jet flow field testing device for aircraft tire explosion according to claim 2, characterized in that: The jet port sealing assembly comprises a lower cover plate, a plate valve, a base, an upper cover plate, a seal and a fastener; the seal is arranged between the upper cover plate and the lower cover plate, and is used to seal the jet channel between the upper cover plate and the lower cover plate; the fastener is used to fasten and connect the lower cover plate, the upper cover plate and the plate valve; the base is used to connect the jet port sealing assembly with the reinforcement assembly; The upper cover plate and the lower cover plate are annular structures; the middle channel of the annular structure of the upper cover plate is the upper part of the jet channel; The middle channel of the annular structure of the lower cover plate is the lower part of the jet channel; The jet port sealing component is configured by arranging a plate valve between the jet channels of the upper cover plate and the lower cover plate. When the tire body is inflated, the plate valve seals the jet channel thereunder to meet the pressure inflation requirement. When a jet needs to be generated, the deflagration power component connected to the plate valve is started to open the plate valve to open the jet port. The high-pressure gas under the plate valve is ejected through the channel on the upper cover plate to form a jet field required for the test.

6. The jet flow field testing device for aircraft tire explosion according to claim 5, characterized in that: The length of the plate valve is obtained according to a first length calculation model; the expression of the first length calculation model is: L1=0.5D2+(4~5)mm, Wherein, D2 is the outer diameter of the O-type sealing ring around the jet port, and the increased 4 to 5 mm is for the edge of the plate valve to reliably compress the sealing ring; the sealing member is an O-type sealing ring; The diameter D1 of the jet channel of the lower cover plate is obtained according to the second length calculation model; the expression of the second length calculation model is: D1=d+(H+h1-h)tan19°, Among them, d is the diameter of the jet hole on the outer reinforcing plate, H is the thickness of the disc of the lower cover plate, h1 is the distance between the lower bottom surface of the disc of the lower cover plate and the upper surface of the outer reinforcing plate, and h is the depth of the plate valve slide groove.

7. The jet flow field testing device for aircraft tire explosion according to claim 6, characterized in that: The outer diameter D2 of the outer circle of the O-type sealing ring around the jet port is obtained according to the third length calculation model; the expression of the third length calculation model is: D2=D1+2(b1+b2), Wherein, b1 is the difference between the radius of the jet port and the inner radius of the O-type sealing ring around it; b2 is the radial width of the O-type sealing ring around the jet port.

8. The jet flow field testing device for aircraft tire explosion according to claim 5, characterized in that: The jet channel of the upper cover plate is a tapered hole whose cross-sectional area gradually increases from bottom to top; the tapered hole and the jet channel of the lower cover plate are on the same axis, and the diameter D3 of the smallest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is: D3=D1+2h×tan19°, Wherein, D3 is the diameter of the smallest cross-sectional circle of the tapered hole; The diameter D4 of the largest cross-sectional circle of the tapered hole is obtained according to the fourth length calculation model; the expression of the fourth length calculation model is: D4=D3+2H×tan19°, Wherein, D4 is the diameter of the largest cross-sectional circle of the tapered hole.

9. The jet flow field testing device for aircraft tire explosion according to claim 5, characterized in that: The deflagration power assembly comprises: a power cylinder, a piston rod, a fireproof sealing ring, a sealing ring, a baffle, gunpowder, a wire, a piston and a leakage hole; The power cylinder is the outer shell of the deflagration power assembly, and a piston rod is arranged in the circular hole-shaped structure at the front end thereof; the first end of the piston rod is in contact with the plate valve, and the second end of the piston rod is inserted into the piston; the piston is arranged at the end of the internal space of the power cylinder; a baffle is arranged at a position adjacent to the inserted piston part of the second end of the piston rod, and gunpowder is arranged in the closed space formed by the baffle and the piston, the first end of the wire passes through the piston and extends into the gunpowder, and the second end of the wire extends to the outside of the power cylinder; a fire-proof sealing ring is arranged on the part of the baffle that contacts the inner wall of the power cylinder; a closed sealing ring is arranged on the part of the piston that contacts the inner wall of the power cylinder; a leakage hole is provided on the cylinder wall at the rear of the power cylinder for gas leakage at the end stage of the piston stroke to reduce the movement speed of the piston.

10. The jet flow field testing device for aircraft tire explosion according to claim 5, characterized in that: The piezoelectric sensor array includes a plurality of piezoelectric sensors and a data processing module; The data processing module is connected to each piezoelectric sensor and is used to perform filtering and fusion processing on the piezoelectric data sequences and piezoelectric sensor positions measured by all piezoelectric sensors to obtain jet field information.

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