CN115876434B - Pressure load propagation experimental device and method - Google Patents
Pressure load propagation experimental device and method Download PDFInfo
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- CN115876434B CN115876434B CN202310140467.5A CN202310140467A CN115876434B CN 115876434 B CN115876434 B CN 115876434B CN 202310140467 A CN202310140467 A CN 202310140467A CN 115876434 B CN115876434 B CN 115876434B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The embodiment of the invention provides a pressure load propagation experimental device and a pressure load propagation experimental method, and relates to the technical field of tunnel pipeline operation and maintenance. The device is including overflow flat water tank, detachable pipeline and the hydrologic cycle pipeline of head and tail connection in proper order, form hydrologic cycle return circuit, wherein, detachable pipeline level sets up, the water pump is installed on hydrologic cycle pipeline, a plurality of vertical pressure sensor set up along detachable pipeline's length direction interval, a plurality of furcation pipes set up along detachable pipeline's length direction interval, and with detachable pipeline intercommunication, a plurality of horizontal pressure sensor set up along furcation pipe's length direction interval, electric control valve installs the one end that is close to hydrologic cycle pipeline on detachable pipeline. The device and the method can realize more comprehensive and more accurate measurement of the hydraulic pressure characteristics and provide experimental support for safety evaluation, operation and maintenance of hydraulic tunnels and the like.
Description
Technical Field
The invention relates to the technical field of tunnel pipeline operation and maintenance, in particular to a pressure load propagation experimental device and a pressure load propagation experimental method.
Background
Along with the acceleration of the urban process in China, the water use of cities and ecological environments is a necessary development trend by constructing long-distance water delivery projects, even cross-region and cross-river basin water delivery projects.
However, in the pressurized water diversion pipeline system, a series of accidents such as misoperation of a gate valve, accidental power failure of a water pump station, abrupt change of the water level of a water inlet tank and the like, starting of a water pump unit, quick starting and closing of a hydropower station water turbine unit and the like all cause drastic changes of the flow rate of liquid in the pressurized pipeline system, and meanwhile, the liquid pressure in the pipeline is caused to fluctuate greatly, and sometimes the liquid pressure can reach tens of times higher than the normal working pressure of the pipeline. Mishandling may cause strong vibration of the tubing, severe deformation or even bursting of the tubing; meanwhile, pressure pulsation propagates transversely along cracks perpendicular to the pipe wall, and serious consequences such as crack expansion and structural damage can be caused.
The observation of the prototype of the tunnel and the pipeline has the problems of high observation difficulty, high observation cost, long observation period, influence on operation and the like. With the continuous development of sensors and computer technology, model experiment modes are widely applied to the research of water hammer characteristics. At present, model research on non-constant load propagation along a pipeline is limited to single-direction research, water hammer parameters are fixed, along-way change rules of water hammer characteristics cannot be comprehensively reflected, qualitative observation and demonstration are mainly adopted, and research on pressure distribution rules along the transverse direction of the pipeline wall and the longitudinal direction of the pipeline is lacked.
Disclosure of Invention
The invention aims to provide a pressure load propagation experimental device and a pressure load propagation experimental method, which can realize more comprehensive and more accurate measurement of water hammer pressure characteristics and provide experimental support for safety evaluation, operation and maintenance of hydraulic tunnels and the like.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a pressure load propagation experimental device, which comprises an overflow flat water tank, a detachable pipeline and a water circulation pipeline which are sequentially connected end to end, so as to form a water circulation loop, wherein the detachable pipeline is horizontally arranged, and the overflow flat water tank is used for controlling the flow rate of circulating water entering the detachable pipeline;
the device also comprises a water pump, a Y-pipe, a longitudinal pressure sensor, a transverse pressure sensor and an electric control valve, wherein the water pump is arranged on the water circulation pipeline, the longitudinal pressure sensors are arranged at intervals along the length direction of the detachable pipeline, the longitudinal pressure sensor is used for monitoring the water flow pressure along the longitudinal direction in the detachable pipeline, the Y-pipe is used for simulating pipe wall cracks, porous medium materials are filled in the Y-pipe, circulating water flows through the porous medium materials and is used for simulating the water flow through the pipe wall cracks, the Y-pipes are arranged at intervals along the length direction of the detachable pipeline and are communicated with the detachable pipeline, the transverse pressure sensors are arranged at intervals along the length direction of the Y-pipe, and the transverse pressure sensor is used for monitoring the water flow pressure along the transverse direction in the Y-pipe;
the electric control valve is arranged at one end of the detachable pipeline, which is close to the water circulation pipeline, and is used for controlling the vibration amplitude of the circulating water to the detachable pipeline and the pipe wall water attack of the Y-pipe.
In an alternative embodiment, the device further comprises a water return tank and a flow meter connected to the water circulation pipe and located on both sides of the water pump.
In an alternative embodiment, the plurality of longitudinal pressure sensors are uniformly spaced along the length of the removable conduit and the plurality of transverse pressure sensors are uniformly spaced along the length of the furcation tube.
In an alternative embodiment, the angle between the portion of the furcation tube extending with respect to the removable tube and the removable tube is: 30-90 deg..
In an alternative embodiment, the device further comprises a water gauge mounted on the detachable pipe near one end of the return water tank and located on one side of the electric control valve near the overflow water tank, the water gauge being used for visually displaying the water flow pressure when the electric control valve is closed.
In an alternative embodiment, an adjustable overflow plate is arranged inside the overflow flat water tank and is used for controlling the flow rate of circulating water entering the detachable pipeline.
In an alternative embodiment, the device further comprises a controller connected to the longitudinal pressure sensor, the transverse pressure sensor and the electrically controlled valve, the controller being adapted to control the closing speed of the electrically controlled valve.
In an alternative embodiment, a plurality of detachable pipes are connected in sequence and are arranged horizontally, and the number of the detachable pipes is adjusted to control the total length of the detachable pipes.
In a second aspect, the present invention provides a pressure load propagation experimental method, the method comprising:
the pressure load propagation experimental device of the previous embodiment is built;
measuring longitudinal propagation data of water hammer pressure;
measuring transverse propagation data of water hammer pressure;
and processing the longitudinal propagation data and the transverse propagation data to obtain the propagation rule of the water hammer pressure.
In an alternative embodiment, the step of measuring longitudinally-propagating data of the water hammer pressure includes:
the number of the detachable pipelines is adjusted, and the total length of the detachable pipelines is changed, so that the frequency of water hammer is controlled;
the closing speed of the electric control valve is regulated to control the amplitude of the water hammer;
the longitudinal pressure sensor is used for collecting the longitudinal water flow pressure in the detachable pipeline.
In an alternative embodiment, the step of measuring the lateral propagation data of the water hammer pressure comprises:
the number of the detachable pipelines is adjusted, and the total length of the detachable pipelines is changed, so that the frequency of water hammer is controlled;
the closing speed of the electric control valve is regulated to control the amplitude of the water hammer;
and collecting the water flow pressure in the Y-pipe along the transverse direction through a transverse pressure sensor.
The pressure load propagation experimental device and method provided by the embodiment of the invention have the beneficial effects that:
through establishing pipeline water hammer model experimental apparatus, lay a plurality of pressure sensor and realize water hammer pressure along journey measurement to through the adjustment of the parameter such as amplitude, the frequency of control water hammer, research water hammer pressure is along vertical and horizontal propagation law and change characteristics, realize the research to water hammer pressure characteristic more comprehensively, more accurate, and provide experimental support for the safety evaluation and the operation maintenance of hydraulic tunnel etc..
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a pressure load propagation experimental device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another experimental apparatus for pressure load propagation according to an embodiment of the present invention.
Icon: 100-a pressure load propagation experimental device; 1-overflow leveling water tank; 2-removable tubing; 3-a Y-pipe; 4-a water level gauge; 5-an electric control valve; 6-a water return tank; 7-a water circulation pipeline; 8-a water pump; 9-a flow meter; 10-a longitudinal pressure sensor; 11-a lateral pressure sensor; 12-controller.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, arrows indicate water flow directions, and the present embodiment provides a pressure load propagation experimental apparatus 100 (hereinafter referred to as "apparatus"), which mainly relates to an experimental apparatus for non-constant pressure load propagation along a pipe wall in a transverse direction and a pipe longitudinal direction, and the apparatus includes a overflow water tank 1, a detachable pipe 2, a water return tank 6, a water circulation pipe 7, a water pump 8, a flow meter 9, a water level meter 4, a furcation pipe 3, a longitudinal pressure sensor 10, a transverse pressure sensor 11, an electric control valve 5 and a controller 12. Wherein the longitudinal pressure sensor 10 and the transverse pressure sensor 11 are both film-type pressure sensors.
Specifically, overflow flat water tank 1, detachable pipeline 2, return water tank 6 and water circulating pipeline 7 are connected end to end in proper order, form the hydrologic cycle return circuit. Wherein, a plurality of detachable pipelines 2 connect gradually, and all level sets up, adjusts detachable pipeline 2's quantity in order to control detachable pipeline 2's total length to can control the frequency of water hammer.
The overflow flat water tank 1 is used for storing water and providing necessary water flow for experiments through water level difference, and an adjustable overflow plate is arranged in the overflow flat water tank 1 and used for controlling the flow rate of circulating water entering the detachable pipeline 2.
The water pump 8 and the flowmeter 9 are both arranged on the water circulation pipeline 7, the water pump 8 provides necessary power for water flow circulation in the experimental device, and the flowmeter 9 is used for measuring water flow.
A plurality of longitudinal pressure sensors 10 are arranged at intervals along the length direction of the detachable pipe 2, and the longitudinal pressure sensors 10 are used for monitoring the water flow pressure in the detachable pipe 2 along the longitudinal direction. Because the detachable pipeline 2 is horizontally arranged, water flow impacts the inner wall of the detachable pipeline 2, and the impact force of the water flow received by the inner wall of the detachable pipeline 2 is along the longitudinal direction, so the water flow pressure measured by the longitudinal pressure sensor 10 is the longitudinal water flow pressure.
The three-way pipe 3 is used for simulating pipe wall cracks, the porous medium material is filled in the three-way pipe 3, circulating water flows through the porous medium material and is used for simulating circulating water to flow through the pipe wall cracks, and parameters such as porosity and density of the porous medium material can be selected according to requirements. The multiple Y-pipes 3 are uniformly arranged at intervals along the length direction of the detachable pipeline 2 and are communicated with the detachable pipeline 2, the multiple transverse pressure sensors 11 are uniformly arranged at intervals along the length direction of the Y-pipes 3, and the transverse pressure sensors 11 are used for monitoring the water flow pressure in the Y-pipes 3 along the transverse direction.
Wherein, the contained angle between the part that the furcation tube 3 stretches out relative to the detachable pipeline 2 and the detachable pipeline 2 is: 30-90, preferably 90, and the furcation tube 3 extends downwardly relative to the removable tube 2. If the included angle between the extending portion of the detachable pipe 2 and the detachable pipe 2 is a, the pressure value measured by the transverse pressure sensor 11 is b, and b is also the water flow pressure born by the furcation pipe 3 relative to the extending portion of the detachable pipe 2 and is also perpendicular to the inner wall surface of the furcation pipe 3 relative to the extending portion of the detachable pipe 2, then the water flow pressure c=bsina along the transverse direction in the furcation pipe 3. If a is 90 degrees, the pressure value b measured by the transverse pressure sensor 11 is the water flow pressure c along the transverse direction in the Y-pipe 3.
The length of the part of the furcation tube 3 extending out of the detachable pipeline 2 can be flexibly set, and the number of the transverse pressure sensors 11 on the furcation tube can also be flexibly set, for example, the downward extending length of the furcation tube 3 can be reached, and the water flow pressure monitored by the lowest transverse pressure sensor 11 is smaller than a preset value.
In other embodiments, a certain number of the furcation tubes 3 may be provided to protrude upward with respect to the detachable pipe 2, and a lateral pressure sensor 11 for monitoring the water flow pressure in the lateral direction after the water flow permeates upward is disposed on the protruding portion of the furcation tubes 3.
The content to be studied in the lateral measurement section is in fact the propagation law of the water hammer pressure in the wall cracks. The crack is generated in the pipe wall or the tunnel wall (such as a tunnel with concrete as a main material), and the extending direction of the crack depth forms a certain included angle with the pipe wall, so that the length and the angle of the overhanging part in the furcation pipe 3 are actually the depth of the crack simulating the pipe wall and the included angle between the crack simulating the pipe wall and the pipe wall. The actual cracks are always very narrow, and the measuring instrument cannot be arranged in the cracks at all, so that the use of the Y-pipe 3 is equivalent to the enlargement of the cracks, and the propagation rule of the water hammer pressure in the cracks of the pipe wall can be conveniently simulated.
Typically, the pipe wall cracks are relatively narrow and therefore have a certain permeability, so the porous medium material filled in the overhanging portion of the furcation pipe 3 is substantially similar to the permeability of the cracks. The permeability of the actual cracks is related to the width and depth of the cracks, and the permeability of the filled porous medium material is adjusted by adjusting the porosity and density of the filled porous medium material, so that the simulation of the cracks with different sizes is realized, and under the condition that the length of the overhanging part of the Y-pipe 3 is controlled to be unchanged, the simulation of the cracks with different widths is realized in practice; the length of the overhanging part of the Y-pipe 3 can be adjusted, so that the simulation of the propagation rule of the water hammer pressure in cracks with different depths is realized.
The electric control valve 5 is arranged at one end of the detachable pipeline 2 close to the water return tank 6, and the electric control valve 5 is used for controlling the vibration amplitude of the circulating water to the pipe wall water attack of the detachable pipeline 2 and the Y-pipe 3.
The water level gauge 4 is installed on the detachable pipeline 2 and is close to one end of the water return tank 6 and is located on one side of the electric control valve 5, which is close to the overflow water tank 1, and the water level gauge 4 is used for intuitively displaying the water flow pressure when the electric control valve 5 is closed.
The controller 12 is connected to the longitudinal pressure sensor 10, the lateral pressure sensor 11 and the electric control valve 5, and the controller 12 is used for controlling the closing speed of the electric control valve 5.
It is to be easily understood that referring to fig. 2, the pressure load propagation experimental apparatus 100 provided in this embodiment may not be provided with the water return tank 6 and the flow meter 9, and the overflow flat water tank 1, the detachable pipeline 2 and the water circulation pipeline 7 are sequentially connected end to form a water circulation loop.
The embodiment also provides a pressure load propagation experimental method, which mainly relates to an experimental method for non-constant pressure load propagation along the transverse direction of a pipe wall and the longitudinal direction of a pipe, and comprises the following steps:
step 1: the pressure load propagation experimental apparatus 100 of the foregoing embodiment was constructed.
Specifically, the pressure load propagation experimental device 100 is constructed according to the structural description of the pressure load propagation experimental device 100.
The pressure load propagation experimental device 100 is matched with a plurality of specifications of furcation tubes 3, and the lengths of the furcation tubes 3 with different specifications are different relative to the extending parts of the detachable pipeline 2 and the included angles between the furcation tubes 3 and the detachable pipeline 2 are also different.
Step 2: longitudinal propagation data of the water hammer pressure were measured.
Specifically, firstly, the number of the detachable pipelines 2 is adjusted, and the total length of the detachable pipelines 2 is changed, so that the frequency of water hammer is controlled; then, the closing speed of the electric control valve 5 is adjusted to control the amplitude of the water hammer; finally, the longitudinal pressure sensor 10 collects the water flow pressure in the detachable pipeline 2 along the longitudinal direction and sends the water flow pressure to the controller 12, so that different parameters of the water hammer are adjusted, and the controller 12 obtains the longitudinal propagation data of the water hammer pressure under different conditions.
Step 3: lateral propagation data of the water hammer pressure were measured.
Specifically, firstly, the number of the detachable pipelines 2 is adjusted, and the total length of the detachable pipelines 2 is changed, so that the frequency of water hammer is controlled; then, the closing speed of the electric control valve 5 is adjusted to control the amplitude of the water hammer; finally, the transverse pressure sensor 11 collects the transverse water flow pressure in the Y-pipe 3 and sends the water flow pressure to the controller 12, so that different parameters of the water hammer are adjusted to enable the controller 12 to obtain transverse propagation data of the water hammer pressure under different conditions.
Step 4: and processing the longitudinal propagation data and the transverse propagation data to obtain the propagation rule of the water hammer pressure.
Specifically, according to the collected longitudinal propagation data and transverse propagation data, the laws of time domain characteristics, frequency domain characteristics, probability density, along-path distribution, propagation depth, attenuation rate and the like of the water hammer pressure propagated longitudinally and transversely are respectively analyzed, the influence of parameters such as water hammer amplitude, frequency and the like on the water hammer propagation in different directions is discussed, and the difference of the longitudinal propagation and the transverse propagation of the water hammer pressure is compared and analyzed.
For the transverse propagation of the water hammer pressure, besides the analysis content, the extension length of the Y-pipe 3 is controlled to be unchanged, and the influence of different permeabilities, namely different crack widths on the propagation of the water hammer pressure along the path, such as the influence on the properties of amplitude, frequency, propagation depth and the like, is analyzed; similarly, by adjusting the angle and length of the overhanging portion of the furcation tube 3, the difference of the propagation rule of the water hammer pressure in cracks with different angles and depths is analyzed.
The pressure load propagation experimental device 100 and the pressure load propagation experimental method provided by the embodiment of the invention have the beneficial effects that:
through establishing pipeline water hammer model experimental apparatus, lay a plurality of pressure sensor and realize water hammer pressure along journey measurement to through the adjustment of the parameter such as amplitude, the frequency of control water hammer, research water hammer pressure is along vertical and horizontal propagation law and change characteristics, realize the research to water hammer pressure characteristic more comprehensively, more accurate, and provide experimental support for the safety evaluation and the operation maintenance of hydraulic tunnel etc..
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The pressure load propagation experimental device is characterized by comprising an overflow flat water tank (1), a detachable pipeline (2) and a water circulation pipeline (7) which are connected end to end in sequence to form a water circulation loop, wherein the detachable pipeline (2) is horizontally arranged, and the overflow flat water tank (1) is used for controlling the flow rate of circulating water entering the detachable pipeline (2);
the device further comprises a water pump (8), a Y-pipe (3), a longitudinal pressure sensor (10), a transverse pressure sensor (11) and an electric control valve (5), wherein the water pump (8) is installed on the water circulation pipeline (7), a plurality of the longitudinal pressure sensors (10) are arranged at intervals along the length direction of the detachable pipeline (2), the longitudinal pressure sensor (10) is used for monitoring the water flow pressure along the longitudinal direction in the detachable pipeline (2), the Y-pipe (3) is used for simulating pipe wall cracks, the Y-pipe (3) is filled with porous medium materials, circulating water flows through the porous medium materials and is used for simulating the circulating water flow through the pipe wall cracks, a plurality of the Y-pipe (3) are arranged at intervals along the length direction of the detachable pipeline (2) and are communicated with the detachable pipeline (2), a plurality of the transverse pressure sensors (11) are arranged at intervals along the length direction of the Y-pipe (3), and the transverse pressure sensor (11) is used for monitoring the water flow pressure along the transverse direction in the Y-pipe (3);
the electric control valve (5) is arranged at one end, close to the water circulation pipeline (7), of the detachable pipeline (2), and the electric control valve (5) is used for controlling the vibration amplitude of the circulating water to the water hammer on the pipe walls of the detachable pipeline (2) and the Y-pipe (3).
2. The pressure load propagation experimental device according to claim 1, further comprising a water return tank (6) and a flow meter (9), wherein the water return tank (6) and the flow meter (9) are connected to the water circulation pipe (7) and are located at both sides of the water pump (8).
3. The pressure load propagation experimental device according to claim 1, wherein a plurality of the longitudinal pressure sensors (10) are uniformly arranged at intervals along the length direction of the detachable pipe (2), and a plurality of the transverse pressure sensors (11) are uniformly arranged at intervals along the length direction of the furcation pipe (3).
4. The pressure load propagation experimental device according to claim 1, characterized in that an angle between the portion of the furcation tube (3) protruding with respect to the detachable pipe (2) and the detachable pipe (2) is: 30-90 deg..
5. The pressure load propagation experimental device according to claim 2, further comprising a water level gauge (4), wherein the water level gauge (4) is mounted on one end of the detachable pipeline (2) close to the water return tank (6) and is positioned on one side of the electric control valve (5) close to the overflow flat water tank (1), and the water level gauge (4) is used for intuitively displaying the water flow pressure when the electric control valve (5) is closed.
6. The pressure load propagation experimental device according to claim 1, wherein an adjustable overflow plate is arranged inside the overflow flat water tank (1) and is used for controlling the flow rate of circulating water entering the detachable pipeline (2).
7. The pressure load propagation experimental device according to claim 1, wherein a plurality of the detachable pipes (2) are sequentially connected and are horizontally arranged, and the number of the detachable pipes (2) is adjusted to control the total length of the detachable pipes (2).
8. A method of pressure load propagation experiments, the method comprising:
constructing the pressure load propagation experimental device of claim 1;
measuring longitudinal propagation data of water hammer pressure;
measuring transverse propagation data of water hammer pressure;
and processing the longitudinal transmission data and the transverse transmission data to obtain a transmission rule of the water hammer pressure.
9. The method of claim 8, wherein the step of measuring the longitudinal propagation data of the water hammer pressure comprises:
adjusting the number of the detachable pipelines (2), and changing the total length of the detachable pipelines (2) so as to control the frequency of water hammer;
adjusting the closing speed of the electric control valve (5) to control the amplitude of the water hammer;
the longitudinal pressure sensor (10) is used for collecting the water flow pressure in the detachable pipeline (2) along the longitudinal direction.
10. The method of claim 8, wherein the step of measuring lateral propagation data of the water hammer pressure comprises:
adjusting the number of the detachable pipelines (2), and changing the total length of the detachable pipelines (2) so as to control the frequency of water hammer;
adjusting the closing speed of the electric control valve (5) to control the amplitude of the water hammer;
and collecting the water flow pressure in the cross pipe (3) along the transverse direction through the transverse pressure sensor (11).
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| 局部外包方钢管连接混凝土构件工作性能试验研究;李青宁;徐改革;姜维山;郑先超;徐明堂;;《西安建筑科技大学学报(自然科学版)》;第45卷(第03期);第12-17页 * |
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