79 results about "Stress wave" patented technology

This invention discloses a high-overload data analysis method and system based on multi-dimensional buffer protection, relating to the field of data acquisition and storage technology. The system consists of several functional modules, including: a transient impedance module, which acquires stress wave propagation parameters and material strain data collected in real time by the recorder node, constructs a dynamic digital twin model of the buffer structure, and outputs impact feature vectors and stress field distribution matrices; a signal reconstruction module, which dynamically configures the sensing signals based on the impact feature vectors, including the gain, bandwidth, and filtering parameters of the analog front end, conditions and performs analog-to-digital conversion on the sensing signals, and uses compressed sensing and dictionary learning algorithms to sparsely reconstruct abnormal data, generating a high-fidelity data stream and storage data integrity identifiers for each storage block; and a federated storage module, which inputs the stress field distribution matrix and storage data integrity identifiers into the edge-side reinforcement learning decision engine to calculate the failure risk probability of each storage block.

The application provides a kind of ice constant temperature dynamic mechanical property testing device, belongs to ice detection technical field, including launch subassembly, impact lever, incident support, incident lever, sample support, transmission support, transmission lever, data acquisition module and data processing module, the end face of impact lever towards incident lever is equipped with several spaced convex structures, the end face of incident lever towards impact lever is equipped with shaping piece, shaping piece is used to extend the rising time of incident stress wave that incident lever transmits to ice sample, the end face of incident lever towards ice sample is equipped with wave modulation module, wave modulation module is used to realize the wave impedance continuous gradient matching of incident stress wave from incident lever to ice sample, data processing module corrects the data collected by data acquisition module to obtain final incident wave strain and final transmission wave strain, and calculates the strain rate, stress and strain of ice sample.The application scheme improves the accuracy of ice constant temperature dynamic mechanical property test results.

The application discloses a test device and method for simulating the impact effect of super-high-speed penetration into the ground, wherein a static load loading system is used to apply static load to the periphery of a sample to simulate the ground stress environment, and a dynamic load loading system is used to apply impact dynamic load to the top of the sample to simulate the ground impact, wherein in the dynamic load loading system, a phase change reaction kettle is used to heat liquid CO2 to a supercritical high-pressure state, a liquid charging module is used to charge the phase change reaction kettle with liquid CO2, a barrel is used to receive the high-pressure gas released by the phase change reaction kettle and form an approximately planar ground shock wave, a stress wave lens module is used to adjust the width of the ground shock wave through a stress wave lens combination and act on the sample, and a control module can control the peak pressure of the ground shock wave by regulating the heating power of the phase change reaction kettle and can control the duration of the ground shock wave by adjusting the aperture of the barrel. The application realizes controllable and high-fidelity simulation of the impact effect of super-high-speed penetration into the ground.

The application discloses a test system and a test method for simulating the stress wave action of a columnar charge blast hole, and relates to the technical field of rock dynamics and blasting engineering. The test system comprises a dynamic loading system, an incidence system, a stress wave conversion body and a sample model. The dynamic loading system generates a plane stress wave. The plane stress wave is conducted to the stress wave conversion body through the incidence system. The stress wave conversion body is attached to the sample model half-cylindrical channel through a semi-cylindrical pressure-arc surface, and the plane stress wave is converted into a cylindrical stress wave acting on the sample. The application generates controllable plane stress waves through the dynamic loading system, and the plane stress waves are shaped and directed through the incidence system, so that the waveform is stable, the energy loss is low, and the input conditions are consistent. The stress wave conversion body converts the plane stress wave into a cylindrical stress wave attached to the columnar blast hole through a plane-arc structure, highly simulates the radial diffusion characteristics of the real blasting stress wave, and realizes the simulation of the columnar charge blast hole blasting stress wave loading in the laboratory.

This invention discloses a tower crane jacking shoe status identification system and method based on multimodal perception. The method includes: acquiring an image of the area where the jacking beam shaft end of the tower crane meets the step groove, and calculating the fitting gap; collecting stress wave signals generated by the jacking beam during the loading process of the tower crane's jacking cylinder, and extracting abnormal features; co-processing the fitting gap and abnormal features to comprehensively determine the shoe status; and executing a graded response based on the determination result to complete the tower crane jacking shoe status identification based on multimodal perception. The system is used to implement the above method. This invention can accurately identify risk states such as "false jacking" and structural damage, realize graded early warning and active protection, solve the technical problems of low reliability of existing single sensor detection and inability to identify fitting quality, and significantly improve the safety of tower crane jacking operations.

The present application relates to the technical field of engineering blasting optimization, in particular to a dynamic optimization design method based on engineering blasting parameters, comprising: collecting stratum geological parameters such as rock hardness profile and rock mass fracture distribution of blasting site and blasting vibration three-direction velocity time history monitoring data, carrying out time-frequency joint analysis on time history record to extract dispersion curve and energy attenuation envelope, and constructing a digital rock mass structure model capable of calculating blasting stress wave propagation path. The vibration characteristic data is used as boundary condition to carry out numerical simulation to obtain simulated vibration velocity field, according to the difference between simulated data and measured data, combining with rock mass wave impedance distribution, the intelligent optimization algorithm is used to iteratively optimize the charge structure parameters and initiation time sequence scheme, and the optimized blast hole charge quantity, section and initiation delay are output. The method can improve the accuracy of blasting vibration propagation simulation, reduce the deviation between simulated and measured vibration velocity fields, and make the blasting parameter design more suitable for the actual geological environment of the engineering site.

The application discloses a shrinkage mark inhibition method and system of an integrated die casting, and relates to the technical field of die casting. The method comprises the following steps: collecting position information of a solidification front to determine first state information; collecting vibration signals of shrinkage stress waves to reconstruct a shrinkage wave field distribution map as second state information; fusing the first state information and the second state information to generate a shrinkage mark probability cloud map of the whole solidification process; if the shrinkage mark probability cloud map does not satisfy a shrinkage mark probability threshold, activating a shrinkage mark inhibition module, executing compensation wave parameter decision through a first decision layer, executing local shrinkage compensation pressure pulse parameter decision through a second decision layer, outputting mapping and optimization iteration of a layer, and determining a die casting regulation parameter combination; and executing die casting process regulation according to the die casting regulation parameter combination. The technical problem that it is difficult to dynamically inhibit shrinkage marks in the die casting process in the prior art, leading to unstable die casting quality, is solved, dynamic inhibition of shrinkage defects is achieved, and the technical effect of improving the forming quality of die castings is achieved.

Stress wave gear in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 34.4 mm < TDFS < 35.4 mm, in particular 34.9 mm, and / or that for the flex spline inner diameter IDFS: 33.4 mm < IDFS < 34.4 mm, in particular IDFS = 33.9 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 2.05, in particular LFS < IDFS / 2.16 or LFS < IDFS / 3.35, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, the following holds: | R(φ) | > c, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d, where d = 12.22 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k E ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 12.22 mm.

The present invention relates to a stress wave transmission device (8), which includes a rigid wheel (4), a wave generator (6), and a flexible wheel (2) with external teeth (14), each tooth of which satisfies a reference profile (16, 20, 24, 40, 48), the reference profile being parameterized as a reference profile curve in the xy plane, the parametric equations being: x=b·(φ - a·sin(φ)), y=0.5·h·cos(φ), where: b is the width coefficient, φ is the function parameter, a is the shape parameter, h is the reference profile height; and -π ≤ φ ≤ π.

This application discloses a low-loss mining method for the contact zone of fractured and inclined ore bodies, belonging to the field of mining engineering technology. By using decoupled charging in the intensified blasting holes, at least one charging segment and multiple isolation segments are formed within the holes. The charging segment is projected perpendicular to the direction of adjacent intensified blasting holes, and this projection is separated from the charging segments in adjacent holes. This staggered arrangement of the charging segments prevents the wavefronts of the explosive stress waves from adjacent blasting holes from neatly overlapping as they propagate in the rock mass. Instead, they disperse and cancel each other out, weakening the overall energy and peak stress of the blasting vibration field. This reduces the vibration intensity of pre-splitting blasting, minimizes damage to the protected fractured surrounding rock during blasting operations, and ensures that the explosive energy continuously guides crack propagation along the borehole connection direction, forming a pre-splitting isolation surface that conforms to the natural ore-rock boundary. This solves the problems of large disturbances and easy instability of the surrounding rock in traditional pre-splitting blasting.

The present application relates to the field of prestressed concrete cylinder pipe detection, and particularly relates to a PCCP prestress failure signal acquisition and analysis system and method, comprising the following steps: an excitation coil and a magnetic sensor are arranged outside a prestressed steel wire layer of a PCCP pipe, the excitation coil is used to apply a low-frequency alternating excitation magnetic field to the prestressed steel wire layer, the magnetic sensor is used to acquire an eddy current magnetic field signal generated in the prestressed steel wire, and an initial electromagnetic signal of each measuring point is obtained; a strain gauge is fixedly connected between the excitation coil and the magnetic sensor, a resistance signal of the strain gauge is acquired in real time, and a state characteristic value reflecting a mechanical coupling state of a monitoring layer is extracted from the resistance signal. The present application combines the excitation coil, the magnetic sensor and an acousto-optic fiber sensor, cooperatively captures eddy current mutation and stress waves, introduces a strain gauge verification signal to improve reliability, and through confidence management and space-time correlation analysis, cross verification denoising, false negatives and false positives are reduced, and the positioning accuracy and diagnosis depth of broken wires are improved.

This invention discloses a combined process for restoring reservoir drainage and gas production channels using high-pressure drive and chemical dissolution, relating to the field of efficient oilfield exploitation technology. The process includes: S1, conducting production profile testing and sampling analysis of blockages in the target gas well to determine the type, distribution location, and reservoir physical parameters of the blockages, and preparing a corresponding chemical dissolving agent based on the analysis results. This invention couples the mechanical fracture-creating effect of high-pressure pulsed fluid with the cavitation effect and vibrational mass transfer effect of ultrasound. Based on the initial dissolution of blockages by the chemical dissolving agent, the stress waves generated by the high-pressure pulse expand the reservoir microfractures. Simultaneously, the collapse of microbubbles generated by ultrasound enhances the dissolution reaction rate, and the vibration promotes the dissolving agent's penetration into the micropores, achieving a synergistic effect of chemical dissolution and physical displacement, thoroughly removing blockages from the pore throats, and avoiding secondary precipitation of dissolution products.

The application relates to the technical field of high-altitude wind power, in particular to a method and device for actively inhibiting vibration of a high-altitude wind power cable. The method comprises the following steps: constructing a cable dynamics model suitable for the high-altitude wind power cable; inputting dynamics data collected by a sensor arranged at a first preset position on the high-altitude wind power cable into the cable dynamics model, so as to output predicted transverse stress waves at each position on the high-altitude wind power cable; and based on the predicted transverse stress waves at each position on the high-altitude wind power cable, controlling an actuator arranged at a second preset position on the high-altitude wind power cable to act, so as to generate a series of feedforward cancellation waves for offsetting the predicted transverse stress waves at each position, thereby actively inhibiting vibration caused by impact load, and further ensuring that the cable has a controllable pose in the air and finally improving the transmission efficiency of the energy load.

This invention relates to the field of structural engineering testing and discloses a method for the coordinated acquisition and fusion of deflection and strain in static load tests of structural components. The method includes: monitoring local strain physical quantities and calculating real-time strain rate; identifying the strain mutation initiation signal when the strain rate exceeds a threshold; retrieving the relative physical span between sensing nodes and the intrinsic stress wave velocity of the material; calculating the physical lag time; sending a hardware interrupt pulse carrying a time delay parameter to the deflection sensing node; driving the hardware circuit to activate a timing response matching the physical lag time; and capturing the macroscopic deflection physical quantity at the end of the timing. This invention eliminates the perception phase misalignment caused by spatial span by constructing a hardware sampling alignment mechanism driven by physical causality, ensuring that the acquired data conforms to the structural mechanics constitutive relationship, and improving the system's accuracy in identifying structural damage evolution characteristics.

This invention discloses an experimental system and method for simulating the stress wave effect of a cylindrical charge blast hole, relating to the fields of rock dynamics and blasting engineering. The system includes a dynamic loading system, an incident system, a stress wave converter, and a sample model. The dynamic loading system generates a plane stress wave, which is transmitted through the incident system to the stress wave converter. The converter, through a semi-cylindrical pressure arc surface, conforms to the semi-cylindrical channel of the sample model, converting the plane stress wave into a cylindrical stress wave that acts on the sample. This invention generates a controllable plane stress wave through the dynamic loading system, which is shaped and directionally transmitted by the incident system, ensuring waveform stability, low energy loss, and consistent input conditions. The stress wave converter, with its flat-arc structure, converts the plane stress wave into a cylindrical stress wave conforming to the cylindrical blast hole, highly simulating the radial diffusion characteristics of real blasting stress waves. This allows for the simulation of stress wave loading during a cylindrical charge blast hole blast in a mine within the laboratory.

Voltage wave gears in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 50.3 mm < TDFS < 51.3 mm, in particular 50.8 mm, and / or that for the flex spline inner diameter IDFS: 48.6 mm < IDFS < 49.6 mm, in particular IDFS = 49.1 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 2.81, in particular LFS < IDFS / 2.97 or LFS < IDFS / 3.74, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 18.205 mm and Hmax = 18.213 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, the following holds: | R(φ) | > c, where c = 17.802 mm, and - For all φ ∈ {π / 2 + k·π | k E ℤ}, the following holds: | R(φ) | < d, where d = 17.32 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 18.205 mm and Hmax = 18.213 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 17.802 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 17.32 mm.

The application discloses a Hopkinson pressure bar system multi-environment bin rapid switching and accurate coaxial positioning device and a test method, and belongs to the technical field of material dynamic mechanics test equipment. The device comprises an orthogonal distribution track system, a track switching system, a plane bearing steering system, an integral support, a lifting system and a physical positioner. The application realizes rapid transfer and online reconstruction of the environment bin and the test host through the track switching system and the steering system. The application innovatively proposes a conical positioning block and a positioning hole self-adaptive embedding mechanism, realizes lossless and high-precision coaxial centering of the environment bin port and the SHPB rod, and avoids the blindness of manual adjustment. The application fundamentally solves the problems of existing transfer difficulty and axis offset damage to the "one-dimensional stress wave assumption", and provides a reliable means for real-time and efficient continuous dynamic impact test under multi-environment conditions.

Voltage wave gears in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 320 < Cz < 324, in particular Cz = 322 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 63.0 mm < TDFS < 64.0 mm, in particular 63.5 mm, and / or that for the flex spline inner diameter IDFS: 60.8 mm < IDFS < 61.8 mm, in particular IDFS = 61.3 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 3.00, in particular LFS < IDFS / 3.17 or LFS < IDFS / 3.73, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 22.858 mm and Hmax = 22.866 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, the following holds: | R(φ) | > c, where c = 22.625 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d, where d = 22.36 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 22.858 mm and Hmax = 22.866 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 22.625 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 22.36 mm.

The application provides a method for phase interference-based energy-gathering directional blasting of a water-soaked softening joint rock mass and slope damage control, and belongs to the technical field of slope damage control.The application realizes precise damage control of directional blasting of a water-soaked softening joint rock mass through multiple ways of joint-containing softening slope crack repair, main blasting area energy directional phase interference and fluid consumption of explosion energy, fuses rock mass damage dynamics, stress wave interference theory and environmental engineering, solves the problem that after a mine water body is soaked, the slope rock mass is softened, cracks develop and collapse is caused under explosion load, significantly improves crack filling rate, reduces vibration speed of the joint-containing softening slope, effectively eliminates collapse risk and environmental hazards caused by explosion load, has high construction efficiency, simple operation process, high reliability, high resource reuse rate and good use prospect.

This invention discloses a high-load-bearing backing bearing with a multi-layered composite wall thickness outer ring. The bearing's dynamic blocking transition layer is composed of polyhedral rigid microparticles and a viscoplastic matrix, with the microparticle volume fraction limited within a critical blocking threshold range. Under quasi-static radial heavy loads, the microparticles are in a blocked state, forming a rigid force chain that transmits hydrostatic stress. Under high-frequency transverse shear stress wave excitation, the matrix undergoes transient superplastic rheology, and the force chain enters a locally unblocked state, resulting in micro-rheology and a sudden drop in transverse shear stiffness. Based on the orthogonal decoupling of stress states and the dual-state phase transition characteristics, this invention actively disrupts the subsurface standing wave resonance condition, resolving the contradiction between macroscopic compressive strength and microscopic dissipation. This effectively suppresses deep peeling failure under high-speed, heavy-load conditions, and its material selection and process design fully embody the energy-saving and high-efficiency concept of green manufacturing.

The application provides a photovoltaic pile driver control method, system, terminal and storage medium, relates to the technical field of photovoltaic pile driver control, and comprises the following steps: acquiring original image data and pile body physical parameters; controlling the posture of the preset pile body according to the original image data, and acquiring a correction completion signal; acquiring a stress wave original signal and a current soil penetration depth based on the correction completion signal; analyzing the pile body physical parameters and the stress wave original signal to determine a real-time geological type; controlling the pile driver to hammer the pile body according to the pile body physical parameters, the current soil penetration depth and the real-time geological type to determine a state switching instruction; controlling the pile driver to hammer the pile body based on the state switching instruction to determine a final hammering instruction; and controlling the pile driver to perform a preset hammering operation based on the final hammering instruction to complete the work. The application has the effect of improving the construction efficiency of the photovoltaic pile driver.

This invention discloses a finite element method and apparatus for a refined distributed projectile-guided system. The method constructs simulation models of the projectile body and target plate. The projectile model consists of three propellant charges, two propellant separators positioned between adjacent charges, a fuze holder mounted at the bottom of the projectile, and an outer shell. A sensor is installed in each of the two propellant separators, and a sensor is installed in each base fuze within the fuze holder. Finite element simulation of the penetration process is performed, and acceleration time history curves from sensors located at the projectile tip, mid-projectile, and base are collected. The signals from the three sensors are cross-correlated and filtered to obtain acceleration time history curves decoupled from stress wave aliasing. This invention can reproduce the actual projectile-guided system structure, supports distributed sensor arrangement, and, with the aid of signal processing algorithms, can solve signal aliasing and noise interference problems, achieving high-precision overload signal acquisition.

Voltage wave gears in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 63.0 mm < TDFS < 64.0 mm, in particular 63.5 mm, and / or that for the flex spline inner diameter IDFS: 60.8 mm < IDFS < 61.8 mm, in particular IDFS = 61.3 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 3.00, in particular LFS < IDFS / 3.17 or LFS < IDFS / 3.73, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 23.124 mm and Hmax = 23.132 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k E ℤ}, the following holds: | R(φ) | > c, where c = 22.627 mm, and - For all φ ∈ {π / 2 + k·π | k E ℤ}, the following holds: | R(φ) | < d, where d = 22.03 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 23.124 mm and Hmax = 23.132 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k E ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 22.627 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 22.03 mm.

This invention discloses a segmented combined grouting device and its grouting support process for fractured surrounding rock in high-stress wave chambers, relating to the field of support technology for fractured surrounding rock chambers. The grouting device includes a support sleeve, a splicable grouting conduit, and a combined material grouting machine. The splicable grouting conduit extends into the support sleeve and is connected to the combined material grouting machine. The splicable grouting conduit includes multiple threaded, detachable hollow grouting rods. The support sleeve includes a hollow sleeve rod body with a set of grout outlet holes, the spacing between adjacent grout outlet holes being consistent with the length of a single detachable hollow grouting rod section. This invention is applicable to the support and reinforcement of damaged chambers, tunnels, coal mine roadways affected by high-stress waves, and fractured areas in deep underground engineering projects. The entire grouting support process has multiple functions, including segmented grouting, combined support of reinforcing and wave-damping zones, wave-damping buffering, and effective reinforcement of surrounding rock, and features simple operation and stable performance.

This application relates to the field of tunnel blasting technology, and particularly to a tunnel blasting construction method. In this blasting construction method, blasting design is first performed, and a delay design is conducted based on the principle of phase-shifted superposition and cancellation of stress waves. Drilling and blasting tests are then conducted based on the delay design scheme to determine the specific blasting delay suitable for the site conditions. This ensures better accuracy of the blasting delay design parameters, achieving a better peak-shifting and vibration reduction effect. This not only reduces the impact of blasting vibration on the surrounding environment but also ensures better blasting results, thereby maximizing blasting efficiency. Specifically, this construction method simplifies the blasting waveform to the superposition of single-hole waveforms. The phase difference is adjusted by adjusting the detonation time of different boreholes. To achieve the effect of perfectly offsetting and canceling each other out of adjacent seismic waves, the period difference between the two adjacent seismic waves must be an odd multiple of π. This allows for mutual cancellation of adjacent seismic waves, achieving the goal of reducing the impact of blasting vibration.

This invention discloses a stress wave protection structure, relating to the field of stress wave protection technology. It includes multiple sets of impedance mismatched structural segments and multiple sets of high-damping dissipation structural segments, with the impedance mismatched structural segments and the high-damping dissipation structural segments arranged alternately. The impedance mismatched structural segments directly reflect a portion of the stress wave transmitted to the protection structure, reducing the transmitted wave energy within the protection structure. The stress wave transmitted into the impedance mismatched structural segments undergoes multiple reflections and transmissions within the impedance layer, increasing the vibration frequency of the stress wave propagating into the high-damping dissipation structural segments. This leverages the stress wave attenuation capability of the high-damping material, and the high-damping dissipation structural segments convert the elastic energy generated during stress wave reflection into heat energy, thus dissipating the stress wave energy.