CN210664961U - Test device for verifying tube beam induced vibration principle - Google Patents
Test device for verifying tube beam induced vibration principle Download PDFInfo
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- CN210664961U CN210664961U CN201921000113.6U CN201921000113U CN210664961U CN 210664961 U CN210664961 U CN 210664961U CN 201921000113 U CN201921000113 U CN 201921000113U CN 210664961 U CN210664961 U CN 210664961U
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Abstract
The utility model provides a test device for verifying pipe beam sends vibration principle, it includes runner groove and experimental analog body, and the runner groove includes: an inlet section, an inlet stabilizing section, a testing section, an outlet stabilizing section and an outlet section. The test simulator is fixed on the test section and comprises a groove and a test tube arranged in the groove, and the test tube can be one of a single straight tube, a straight tube bundle, a single bent tube and a bent tube bundle; when the test tube is a single straight tube or a straight tube bundle, the inlet stable section, the test section and the outlet stable section are all rectangular runner grooves, and the grooves are rectangular grooves; when the test tube is a single bent tube or a bent tube bundle, the inlet stable section, the test section and the outlet stable section are all fan-shaped runner grooves, and the grooves are fan-shaped grooves. One end of the test tube is fixed at the bottom of the groove, and the other end of the test tube is a free end. The utility model discloses a return bend and straight tube test result's contrast can be verified the principle that the return bend line of beam caused the vibration.
Description
Technical Field
The utility model relates to an engineering test technical field especially relates to a test device for verifying pipe beam sends vibration principle.
Background
At present, a nuclear power steam generator or a heat exchanger in the petrochemical industry carries out a pipe beam induced vibration test for a straight pipe or a U-shaped pipe, and a bent pipe beam induced vibration principle verification test applied to a spiral coil pipe is not available at present.
For spiral coil steam generators, the spiral heat transfer tubes are subjected to flow-induced vibrations induced by the reactor coolant flow. There are various mechanisms for flow-induced vibration caused by fluid outside the pipe, such as turbulent random vibration, vortex shedding vibration, and ballistic destabilizing vibration. The above-mentioned flow-induced vibration phenomena may cause abrasion between the spiral tubes and the support bars, thereby causing breakage of the spiral heat transfer tubes, and thus, it is necessary to evaluate the flow-induced vibration of the spiral heat transfer tube bundle.
Semi-empirical formulas for analyzing and calculating various mechanisms of flow-induced vibration are obtained based on tests of straight pipes and equidistantly distributed (equilateral triangle or square) straight pipe bundles. For heat transfer tube bundles with spiral coils and non-equidistant distribution, the applicability of the formulas and parameters used in these specifications needs to be additionally verified, and experimental studies need to be carried out on the flow-induced vibration phenomena of the space bends and the bent tube bundles.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a test device for verifying pipe beam current causes vibration principle not only can develop to single straight tube and straight tube bundle and flow and cause vibration test, can also develop to single return bend and return bend bundle and flow and cause vibration test, through the contrast of return bend and straight tube test result, can verify the principle that the return bend beam current caused the vibration.
The utility model provides a pair of a test device for verifying pipe beam sends vibration principle, including runner groove and experimental analog body, the runner groove include with experimental analog body assorted: an inlet section, an inlet stabilizing section, a testing section, an outlet stabilizing section and an outlet section;
the test simulator comprises a test section, a test simulation body and a test tube, wherein the test simulation body is fixedly arranged on the test section and comprises a groove and a test tube arranged in the groove, and the test tube is one of a single straight tube, a single straight tube bundle, a single bent tube and a single bent tube bundle; when the test tube is a single straight tube or a straight tube bundle, the inlet stable section, the test section and the outlet stable section are all rectangular runner grooves, and the grooves are rectangular grooves; when the test tube is a single bent tube or a bent tube bundle, the inlet stabilizing section, the test section and the outlet stabilizing section are all fan-shaped runner grooves, and the grooves are fan-shaped grooves;
the one end of test tube is fixed the bottom of recess, just the other end of test tube is the free end, two sides of recess are two relative planes, just the top of recess is fixed with the observation window, the bottom, two sides and the top of recess constitute an airtight runner jointly.
Preferably, the straight tube bundle is formed by a plurality of straight tubes distributed in an array;
the width of a flow channel between the outermost straight pipe in the plurality of straight pipes distributed in an array and the side surface of the groove is half of the width of a flow channel between two adjacent straight pipes in the plurality of straight pipes distributed in an array;
the width between the single straight pipe and the side wall surface of the groove is larger than the diameter of the single straight pipe twice.
Preferably, the elbow bundle is a plurality of elbows distributed in an array; the width of the flow channel between the outermost bent pipe in the bent pipes distributed in the array and the side surface of the groove is half of the width of the flow channel between two adjacent bent pipes in the bent pipes distributed in the array.
Preferably, a base is fixed to the bottom of the groove through a bolt, and one end of the test tube is welded to the base.
Preferably, a high-speed camera is installed outside the observation window;
the test tube comprises a test tube body, a test tube is arranged in the test tube body, an acceleration sensor is arranged on the inner wall of the test tube body or the inner wall of the test tube body, and a plurality of strain gauges are arranged on the outer wall of the test tube body or the outer wall of the test tube body along the circumferential direction.
Preferably, two acceleration sensors are arranged on the inner wall of the straight pipe or the inner wall of the bent pipe in the test pipe, wherein one acceleration sensor is positioned on the inner wall of the middle part of the straight pipe or the bent pipe, and the other acceleration sensor is positioned on the inner wall of the free end of the straight pipe or the bent pipe.
Preferably, the free end of each straight pipe or each bent pipe in the test pipes is sealed by a rubber plug.
Implement the utility model discloses, following beneficial effect has: the utility model provides a test simulation body is installed to the experimental section in runner groove among the test device, and the test pipe in the experimental simulation body is one of single straight tube, straight tube bank, single return bend, return bend bundle, can carry out different pipe substreams respectively and send vibration test, the utility model discloses not only can develop to single straight tube and straight tube bundle and flow and send vibration test, can also develop to single return bend and return bend bundle and flow and send vibration test, through the contrast of return bend and straight tube test result, can verify the principle that the return bend beam sent the vibration.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of a single straight tube induced vibration principle testing apparatus provided by the present invention.
Fig. 2 is a side view of the testing apparatus for single straight pipe flow induced vibration principle provided by the present invention.
Fig. 3 is a top view of the testing apparatus for straight tube beam induced vibration principle provided by the present invention.
Fig. 4 is a side view of the testing apparatus for straight tube beam induced vibration principle provided by the present invention.
Fig. 5 is a schematic structural diagram of a single straight pipe test simulator provided by the present invention.
Fig. 6 is a schematic structural diagram of the straight tube bundle test simulator provided by the present invention.
Fig. 7 is a schematic structural diagram of the single elbow test simulator provided by the present invention.
Fig. 8 is a schematic structural diagram of the bent tube bundle test simulator provided by the present invention.
Fig. 9 is an array distribution diagram of a plurality of straight tubes in a straight tube bundle provided by the present invention.
Fig. 10 is a schematic view of an installation of an acceleration sensor provided by the present invention.
Fig. 11 is a schematic view of the installation and fixing manner of the acceleration sensor provided by the present invention.
Fig. 12 is a schematic view of a strain gauge installation method provided by the present invention.
Detailed Description
The utility model provides a test device for verifying pipe beam flow causes vibration principle, as shown in figure 1, figure 2, figure 3, figure 4, it includes runner groove and experimental analog body, the runner groove include with experimental analog body assorted: an inlet section 2, an inlet stabilizing section 3, a testing section 4, an outlet stabilizing section 5 and an outlet section 6. The fluid flows in from the fluid inlet R1 and flows out from the fluid outlet R2.
The test simulator is fixedly arranged on the test section 2 and comprises a groove 7 and a test tube 8 arranged in the groove 7, wherein the test tube 8 is one of a single straight tube shown in fig. 5, a straight tube bundle shown in fig. 6, a single bent tube shown in fig. 7 and a bent tube bundle shown in fig. 8; when the test tube 8 is a single straight tube or a straight tube bundle, the inlet stabilizing section 3, the test section 4 and the outlet stabilizing section 5 are all rectangular runner grooves, and the groove 7 is a rectangular groove; when the test tube 8 is a single bent tube or a bent tube bundle, the inlet stabilizing section 3, the test section 4 and the outlet stabilizing section 5 are all fan-shaped runner grooves, and the groove 7 is a fan-shaped groove. The test simulator shown in fig. 2 is a single straight tube test simulator 11, and the test simulator shown in fig. 3 and 4 is a straight tube bundle test simulator 12.
One end of the test tube 8 is fixed at the bottom of the groove 7, the other end of the test tube 8 is a free end (a straight tube free end 81 shown in fig. 5 and 6, and a bent tube free end 82 shown in fig. 7 and 8), two side surfaces of the groove 7 are two opposite planes, the top of the groove 7 is fixed with an observation window 9, and the bottom, the two side surfaces and the top of the groove 7 form a closed flow channel together. An observation window 9 is also arranged at the test section 4 above the test simulacrum, and a light inlet 50 is arranged at the inlet stabilizing section 3 or the outlet stabilizing section 5 near the bottom of the test simulacrum.
When the test simulator in the test device comprises a plurality of straight pipes distributed in an array or a plurality of bent pipes distributed in an array, the main pipe comprises two sections of inlet stabilizing sections 3 between the inlet section 2 and the test section 4, and a rectifying section 31 is arranged between the two sections of inlet stabilizing sections 3.
Further, the straight tube bundle is a plurality of straight tubes distributed in an array; the width of the flow channel A11 between the outermost straight pipe in the plurality of straight pipes distributed in an array and the side surface of the groove 7 is half of the width of the flow channel between two adjacent straight pipes in the plurality of straight pipes distributed in an array. The straight pipe test simulators with different pitch-diameter ratios can be obtained by simulating the straight pipe bundle test pieces with the same pitch-diameter ratio and adjusting the distance between the straight pipes along the fluid direction. The difference in spatial distribution between the same pitch ratio bundle and the different pitch ratio bundles is shown in fig. 9.
The width between the single straight pipe and the side wall surface of the groove 7 is larger than the diameter of the single straight pipe twice. A flow passage A10 is formed between the single straight pipe and the side wall surface of the groove 7.
The elbow bundle is a plurality of elbows distributed in an array; the width of the flow channel A21 between the outermost bent pipe in the plurality of bent pipes distributed in the array and the side surface of the groove is half of the width of the flow channel between two adjacent bent pipes in the plurality of bent pipes distributed in the array.
The same as the straight tube bundle, the bent tube bundle test simulator also has two test simulators with the same pitch-diameter ratio and different pitch-diameter ratios.
The width between the single bent pipe and the side wall surface of the groove is larger than twice of the diameter of the single bent pipe. A flow passage a20 is formed between the single bend and the side wall surface of the groove 7.
Further, a base 70 is fixed to the bottom of the groove 7 by bolts, and one end of the test tube 8 is welded to the base 70.
A high-speed camera is arranged outside the observation window 9; an acceleration sensor 83 is provided on the inner wall of the straight pipe or the inner wall of the bent pipe of the test pipe 8, and a plurality of strain gauges 84 are attached to the outer wall of the straight pipe or the outer wall of the bent pipe of the test pipe 8 in the circumferential direction.
Two acceleration sensors 83 are arranged on the inner wall of the straight pipe or the inner wall of the bent pipe in the test pipe 8, wherein one acceleration sensor 83 is positioned on the inner wall of the middle part of the straight pipe or the bent pipe, and the other acceleration sensor 83 is positioned on the inner wall of the free end of the straight pipe or the bent pipe.
The free end of each straight pipe or bent pipe in the test pipe 8 is sealed by a rubber plug.
For a single straight tube test phantom, as shown in fig. 10, the vibration acceleration, displacement and strain of the tube can be measured during the test by the acceleration sensor 83, the high speed camera and the strain gauge 84. The 2 acceleration sensors 83 are respectively installed in the midspan and the free end of the tube, the acceleration sensors 83 are fixed through screws and auxiliary installation devices, the tail end of the tube is sealed in a waterproof mode through rubber plugs, the acceleration sensors 83 are installed and fixed in a mode shown in figure 11, the installation position of the acceleration sensors 83 is shown as B1 in figure 11, the installation auxiliary position of the acceleration sensors 83 is shown as B2 in figure 11, 80 is a straight tube, and 85 is a screw hole. The top wall of the runner groove (groove 7) is made of transparent materials and serves as an observation window, and a high-speed camera is erected outside the runner groove and can be used for shooting vibration displacement of the free end of the pipe at a high speed, so that subsequent image analysis is facilitated. At a certain distance from the fixed end of the pipe, 4 strain gauges 84 are uniformly arranged on the outer wall surface of the pipe along the circumferential direction, a rubber sleeve 86 is used for isolation protection outside the strain gauges 84, and the installation mode of the strain gauges 84 can be seen in fig. 12.
The installation type, installation position and installation fixing mode of the sensor in the single bent pipe test simulation body are the same as those of the single straight pipe test simulation body.
The straight tube bundle test simulator and the bent tube bundle test simulator select partial tubes to measure, wherein the installation type, installation position and installation fixing mode of the sensor are the same as those of a single straight tube test simulator.
And each test simulator is provided with a measuring sensor, and the corresponding test device is connected with the hydraulic rack so as to carry out the corresponding flow-induced vibration test.
The utility model also provides a use method for verifying the test device that the tube bundle flow caused the vibration principle, test device are foretell test device, and use method includes following step:
s1, increasing the flow of the fluid in the runner groove by adopting a mode of increasing the flow in a stepped mode;
s2, when the fluid flow is increased to the set target maximum value, the fluid flow is gradually reduced;
s3, when the fluid flow rate is reduced to the set minimum value, returning to the step S1 from the 1 st to the nth time, and executing the step S4 at the n +1 st time;
s4, increasing the flow rate of the fluid in the runner groove in a step mode until the test pipe in the test simulator reaches fatigue fracture;
in each step, under different fluid flow rates, measuring the vibration acceleration and strain response time-course curve of the test tube in the test simulator to obtain the change relation of the vibration acceleration and strain of the test tube in the test simulator along with the fluid flow rate.
The use method of the test device for verifying the tube beam induced vibration principle further comprises the following steps:
when the test pipe is a single straight pipe, obtaining the fluid flow corresponding to the maximum vibration response point when the straight pipe in the test simulator generates vortex shedding and the fluid flow corresponding to the maximum vibration response point when the straight pipe in the test simulator generates vibration locking according to the change relation between the vibration acceleration and the strain of the straight pipe in the test simulator and the fluid flow;
when the test tubes are a plurality of straight tubes distributed in an array, the fluid flow corresponding to the maximum vibration response point when turbulent excitation occurs to the straight tubes in the test simulator or the fluid flow corresponding to the maximum vibration response point when the straight tubes in the test simulator generate fluid elastic instability is obtained according to the change relation between the vibration acceleration and the strain of the straight tubes in the test simulator along with the fluid flow.
The use method of the test device for verifying the tube beam induced vibration principle further comprises the following steps:
when the test pipe is a single bent pipe, obtaining the fluid flow corresponding to the maximum vibration response point when the bent pipe in the test simulator is subjected to vortex shedding and the fluid flow corresponding to the maximum vibration response point when the bent pipe in the test simulator is subjected to vibration locking according to the change relation between the vibration acceleration and the strain of the bent pipe in the test simulator and the fluid flow;
when the test tubes are a plurality of bent tubes distributed in an array, the fluid flow corresponding to the maximum vibration response point when the bent tubes in the test simulator generate turbulent excitation or the fluid flow corresponding to the maximum vibration response point when the bent tubes in the test simulator generate fluid elastic instability is obtained according to the change relation between the vibration acceleration and the strain of the bent tubes in the test simulator and the fluid flow.
The above method can be specifically explained by the following examples:
(1) and (3) carrying out a single straight pipe flow induced vibration test.
The fluid flow in the test device is increased in a step mode, and the vibration response of a single straight pipe under different flow rates (flow velocities) is obtained. When the flow rate is increased to the set target maximum value, the flow rate is gradually reduced to the set minimum value, and then the flow rate is increased to the set target maximum value in a step-by-step mode. After the above process is repeated for 3 times, when the 4 th time of the flow reaches the set maximum value, the flow is continuously and slowly increased in steps until the fatigue fracture of the pipe is reached. The test was stopped after the tube in the test simulant broke. And aiming at an acceleration and strain response time-course curve obtained by measuring in a flow-induced vibration test, obtaining the change relation of the strain and acceleration vibration response of the measured pipe along with the flow (flow velocity) by statistical analysis, fitting the curve, and obtaining the flow corresponding to the vibration response maximum point when the pipe in the test simulation body is vortex shedding according to the fitted curve.
(2) Single bend flow induced vibration test.
The flow is increased in a step mode, and the vibration response of the single bent pipe under different flows (flow speeds) is obtained. When the flow rate is increased to the set target maximum value, the flow rate is gradually reduced, and then the flow rate is increased to the set target maximum value in a step mode. After the above process is repeated for 3 times, when the flow reaches the set maximum value for the 4 th time, the flow is continuously and slowly increased in steps until the pipe reaches fatigue fracture. The test was stopped after the tube broke. And aiming at the acceleration and strain response time course curve obtained by measuring the flow-induced vibration test, obtaining the change relation of the strain and acceleration vibration response of the measured pipe along with the flow velocity by statistical analysis, fitting the curve, and obtaining the flow corresponding to the vibration response maximum point when the vortex shedding occurs to the pipe according to the fitted curve.
And carrying out comparative analysis aiming at the acceleration, displacement and strain values of the single straight pipe and the single bent pipe under the same flow step, and checking the difference value of the same measurement parameter of the bent pipe and the straight pipe. And fitting and correcting the empirical formula of the existing straight pipe based on the measurement parameters of the bent pipe.
(3) And (5) performing a straight tube beam induced vibration test.
The flow is increased in a step mode, and corresponding parameters such as vibration acceleration, vibration strain and the like of the straight tube bundle under different flows (flow velocities) are obtained. When the flow rate is increased to the set target maximum value, the flow rate is gradually reduced, and then the flow rate is increased to the set target maximum value in a step mode. After the above process is repeated for 3 times, when the flow reaches the set target maximum value for the 4 th time, the flow is continuously and slowly increased in steps until the fatigue fracture of the pipe is achieved. The test was stopped after the tube broke. And aiming at an acceleration and strain response time course curve obtained by measuring in a flow induced vibration test, obtaining the change relation of the strain and acceleration vibration response of the measured tube along with the flow velocity through statistical analysis, fitting the curve, and obtaining the flow corresponding to the maximum vibration response point when the straight tube bundle tube generates turbulence excitation or the flow when the straight tube bundle tube generates 'flow bomb instability' according to the fitted curve.
According to the implementation steps, flow-induced vibration tests are respectively carried out on the straight tube bundles with the same pitch-diameter ratio and the straight tube bundles with different pitch-diameter ratios.
(4) Bending tube bundle vibration characteristics and flow induced vibration test.
The flow is increased in a step mode, and corresponding parameters such as vibration acceleration, vibration strain and the like of the downward bent tube bundles with different flows (flow velocities) are obtained. When the flow rate is increased to the set target maximum value, the flow rate is gradually reduced, and then the flow rate is increased to the set target maximum value in a step mode. After the above process is repeated for 3 times, when the flow reaches the set target maximum value for the 4 th time, the flow is continuously and slowly increased in steps until the fatigue fracture of the pipe is achieved. The test was stopped after the tube broke. And aiming at an acceleration and strain response time course curve obtained by measuring in a flow-induced vibration test, obtaining the change relation of the strain and acceleration vibration response of the measured tube along with the flow speed by statistical analysis, fitting the curve, and obtaining the flow corresponding to the maximum vibration response point when the bent tube bundle tube is subjected to turbulence excitation or the flow when the bent tube bundle tube is subjected to fluid bomb instability according to the fitted curve.
According to the implementation steps, flow-induced vibration tests are respectively carried out on the bent pipe bundles with the same pitch-diameter ratio and the bent pipe bundles with different pitch-diameter ratios.
And carrying out comparative analysis aiming at the acceleration, displacement and strain values of the downward bent tube bundle and the straight tube bundle with the same flow step, and checking the difference value of the same measurement parameter of the bent tube bundle and the straight tube bundle. And fitting and correcting the empirical formula of the existing straight tube bundle based on the measurement parameters of the bent tube bundle.
The utility model provides a test device has following advantage:
1) the utility model provides a test device structural style is simple, through diversified modular design, can greatly reduced manufacturing degree of difficulty, reduces test cost.
2) The utility model discloses a cantilever beam form is fixed, changes and realizes flowing and send the vibration phenomenon, great reduction to the specification requirement of hydraulic test bench.
3) The utility model discloses mainly be to the return bend line beam and send the principle of vibration to develop the experiment, can also send the principle of vibration to the straight tube line beam to expand the experiment, test result and conclusion can not be restricted to a certain concrete engineering product, can popularize and be applied to in most of engineering products that contain return bend and straight tube bank.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (7)
1. The utility model provides a test device for verifying tube beam causes vibration principle which characterized in that, includes runner groove and experimental simulacrum body, the runner groove include with experimental simulacrum body assorted: an inlet section, an inlet stabilizing section, a testing section, an outlet stabilizing section and an outlet section;
the test simulator comprises a test section, a test simulation body and a test tube, wherein the test simulation body is fixedly arranged on the test section and comprises a groove and a test tube arranged in the groove, and the test tube is one of a single straight tube, a single straight tube bundle, a single bent tube and a single bent tube bundle; when the test tube is a single straight tube or a straight tube bundle, the inlet stable section, the test section and the outlet stable section are all rectangular runner grooves, and the grooves are rectangular grooves; when the test tube is a single bent tube or a bent tube bundle, the inlet stabilizing section, the test section and the outlet stabilizing section are all fan-shaped runner grooves, and the grooves are fan-shaped grooves;
the one end of test tube is fixed the bottom of recess, just the other end of test tube is the free end, two sides of recess are two relative planes, just the top of recess is fixed with the observation window, the bottom, two sides and the top of recess constitute an airtight runner jointly.
2. The test device for verifying the tube bundle induced vibration principle as claimed in claim 1, wherein the straight tube bundle is a plurality of straight tubes distributed in an array;
the width of a flow channel between the outermost straight pipe in the plurality of straight pipes distributed in an array and the side surface of the groove is half of the width of a flow channel between two adjacent straight pipes in the plurality of straight pipes distributed in an array;
the width between the single straight pipe and the side wall surface of the groove is larger than the diameter of the single straight pipe twice.
3. The testing apparatus for verifying the tube bundle induced vibration principle according to claim 1, wherein the tube bundle is a plurality of bent tubes distributed in an array; the width of the flow channel between the outermost bent pipe in the bent pipes distributed in the array and the side surface of the groove is half of the width of the flow channel between two adjacent bent pipes in the bent pipes distributed in the array.
4. The testing device for verifying the tube beam induced vibration principle as claimed in claim 1, wherein a base is fixed to the bottom of the groove through a bolt, and one end of the testing tube is welded to the base.
5. The test device for verifying the tube beam induced vibration principle as claimed in claim 1, wherein a high-speed camera is installed outside the observation window;
the test tube comprises a test tube body, a test tube is arranged in the test tube body, an acceleration sensor is arranged on the inner wall of the test tube body or the inner wall of the test tube body, and a plurality of strain gauges are arranged on the outer wall of the test tube body or the outer wall of the test tube body along the circumferential direction.
6. A test device for verifying the tube beam induced vibration principle as claimed in claim 5, wherein two acceleration sensors are arranged on the inner wall of the straight tube or the inner wall of the bent tube in the test tube, wherein one acceleration sensor is arranged on the inner wall of the middle part of the straight tube or the bent tube, and the other acceleration sensor is arranged on the inner wall of the free end of the straight tube or the bent tube.
7. A test device for verifying the tube beam induced vibration principle as claimed in claim 5, wherein the free end of each straight tube or each bent tube in the test tube is sealed by a rubber plug.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504593A (en) * | 2020-12-15 | 2021-03-16 | 桂林航天工业学院 | Water-cooling switching device for thermal vibration test |
| CN113375900A (en) * | 2021-05-14 | 2021-09-10 | 东方电气集团科学技术研究院有限公司 | Method for testing amplitude and frequency response of flow-induced vibration of tube bundle structure |
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2019
- 2019-06-27 CN CN201921000113.6U patent/CN210664961U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504593A (en) * | 2020-12-15 | 2021-03-16 | 桂林航天工业学院 | Water-cooling switching device for thermal vibration test |
| CN113375900A (en) * | 2021-05-14 | 2021-09-10 | 东方电气集团科学技术研究院有限公司 | Method for testing amplitude and frequency response of flow-induced vibration of tube bundle structure |
| CN113375900B (en) * | 2021-05-14 | 2023-05-12 | 东方电气集团科学技术研究院有限公司 | Method for testing amplitude and frequency response of flow-induced vibration of tube bundle structure |
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