CN110044580B - Physical simulation method and device for coupling wave and movable downward storm - Google Patents
Physical simulation method and device for coupling wave and movable downward storm Download PDFInfo
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- CN110044580B CN110044580B CN201910436501.7A CN201910436501A CN110044580B CN 110044580 B CN110044580 B CN 110044580B CN 201910436501 A CN201910436501 A CN 201910436501A CN 110044580 B CN110044580 B CN 110044580B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 31
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 4
- 241000270295 Serpentes Species 0.000 claims description 3
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- 238000004880 explosion Methods 0.000 claims 1
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- 238000010586 diagram Methods 0.000 description 6
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- 230000000694 effects Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000009429 distress Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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Abstract
The invention discloses a physical simulation method for coupling wave and movable downward storm flow, which comprises the following steps: 1) Installing the test model structure in the wave groove; 2) Opening the wave groove, forming waves with set directions and sizes in the wave groove, and measuring the load applied to the test model structure under the action of the waves; 3) Starting a down-rush current simulator to simulate the down-rush current with the set wind power, setting a moving path of the down-rush current simulator, driving the down-rush current simulator to move by using a moving device of the down-rush current simulator, and enabling the moving path of the down-rush current simulator to pass through a test model structure from far to near or from near to far; 4) And measuring the characteristics of the wind field after the waves are coupled with the downburst wind field in a moving state and the coupling load of the test model structure under different distance conditions of the downburst wind field. The invention also discloses a physical simulation method and device for coupling the wave and the movable downward storm flow.
Description
Technical Field
The invention belongs to the technical field of wind tunnels, and particularly relates to a physical simulation method and device for coupling waves and movable downward storm flow.
Background
The ocean environment has abundant resources, and under the situation that the contradiction between the shortage of global resources and energy supply and the rapid population growth is increasingly prominent, the development and the utilization of the ocean resources are the trend of global economic development. However, the ocean environment is quite complex, and various load coupling actions are faced for a long time to damage ocean engineering. There are cases where there is a coupling of the three flows of the impinging currents, waves and background wind. Downburst refers to a localized strong sinking airflow in thunderstorm cloud, and the wind speed is larger near the ground or sea level, and the maximum wind power can reach fifteen levels. Wave loading is caused by the relative motion of wave water particles and a structure, is random motion, and is difficult to accurately describe by using a mathematical model. For example, 6 months 2015, "eastern star" passenger ships suffer from downburst attacks, which under the combined action of storms and wave loads lead to ship turning, resulting in distress for 442 people.
At present, a method for analyzing the coupling effect of wave load and downburst wind load on a structure is to analyze the effects of the wave load and downburst wind load on the structure independently, and then analyze the response of different load coupling effects on the structure in a superposition mode. This method of analyzing recombination alone cannot take into account the effects of interactions, mutual coupling between several loads. In practice, the characteristics of the wind field are time and space varying as downburst occurs, and the wave load is also a random motion. Therefore, the prior art method cannot consider the interaction and coupling effects of various loads, and meanwhile cannot simulate the change condition of the loads along with space and time, so that the real response of the structure under the coupling effect of various loads cannot be obtained.
Disclosure of Invention
In view of the above, the present invention aims to provide a physical simulation method and a device for coupling waves and mobile downburst, which can simulate the coupling effect of downburst wind load and wave load on a structure, consider the randomness of downburst and wave load, and analyze the real response situation of the structure under the coupling effect of two different loads more accurately.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The invention firstly provides a physical simulation method for coupling wave and movable downward storm flow, which comprises the following steps:
1) Installing the test model structure in the wave groove;
2) Opening the wave groove, forming waves with set directions and sizes in the wave groove, and measuring the load applied to the test model structure under the action of the waves;
3) Starting a down-rush current simulator to simulate the down-rush current with the set wind power, setting a moving path of the down-rush current simulator, driving the down-rush current simulator to move by using a moving device of the down-rush current simulator, and enabling the moving path of the down-rush current simulator to pass through a test model structure from far to near or from near to far;
4) And measuring the characteristics of the wind field after the waves are coupled with the downburst wind field in a moving state and the coupling load of the test model structure under different distance conditions of the downburst wind field.
Further, in the step 2), a bottom vibration box and a side vibration box are arranged in the wave groove, high-frequency pulsation signals are respectively input to the bottom vibration box and the side vibration box, waves in different directions and sizes can be simulated in the wave groove, and a pressure scanning valve is used for measuring the load applied to the test model structure under the action of the waves.
In step 4), a cobra wind speed detector is used for measuring the characteristics of the wind field after the waves are coupled with the downburst in a moving state, and a pressure scanning valve is used for measuring the coupling load born by the test model structure.
The invention also provides a physical simulation device for wave and mobile down-storm coupling, which is suitable for the physical simulation method for wave and mobile down-storm coupling, and is characterized in that: the device comprises a wave groove and a lower-impact storm simulator moving device arranged above the wave groove, wherein the lower-impact storm simulator moving device comprises longitudinal sliding plates respectively positioned at two sides, a transverse sliding rail is arranged between the two longitudinal sliding plates, a simulator mounting plate in sliding fit with the transverse sliding rail is arranged on the transverse sliding rail, and a transverse movement driving mechanism for driving the simulator mounting plate to move along the transverse sliding rail is arranged on the longitudinal sliding plate;
the sliding device also comprises longitudinal sliding rails which are arranged in one-to-one correspondence with the longitudinal sliding plates, and the longitudinal sliding plates are arranged on the longitudinal sliding rails in a sliding fit manner; the two ends of the longitudinal sliding rail are respectively provided with a fixing frame, and the fixing frames are provided with a longitudinal movement driving mechanism for driving the longitudinal sliding plate to move along the longitudinal sliding rail;
A supporting upright post is arranged below the fixing frame;
the simulator mounting plate is provided with a down-storm flow simulator for simulating down-storm flow.
Further, the transverse movement driving mechanism comprises transverse screws which are arranged between the two longitudinal sliding plates and parallel to the transverse sliding rails, the transverse screws are in threaded fit with the simulator mounting plates, and the longitudinal sliding plates are provided with transverse driving motors for driving the transverse screws to rotate.
Further, the longitudinal movement driving mechanism comprises a longitudinal screw rod parallel to the longitudinal sliding rail, two ends of the longitudinal screw rod are respectively and rotatably matched with the fixing frame, the longitudinal screw rod is in threaded fit with the longitudinal sliding plate, and the fixing frame is provided with a longitudinal driving motor for driving the longitudinal screw rod to rotate.
Further, the support upright post adopts a telescopic rod and comprises a loop bar positioned below and a core bar sleeved in the loop bar in a sliding way.
Further, a side baffle plate for shielding wind is arranged between the loop bars of the supporting upright posts.
Further, be equipped with the simulator mounting bracket on the simulator mounting panel, be equipped with vertical slide rail on the simulator mounting bracket, down hit the sudden and violent flow simulator sliding fit and install on the vertical slide rail, just be equipped with on the simulator mounting bracket and be used for driving down hit the sudden and violent flow simulator along the simulator actuating mechanism that vertical slide rail removed.
Further, be equipped with on the downhill and violent class simulator with vertical slide rail sliding fit's vertical slider, simulator actuating mechanism include with the parallel simulator drive screw of vertical slide rail, simulator drive screw with wherein between the vertical slider screw thread fit, just fixed mounting is equipped with on the vertical slide rail be used for the drive simulator drive screw pivoted simulator driving motor.
The invention has the beneficial effects that:
According to the physical simulation method for coupling the waves and the movable down-storm flows, the down-storm flows are simulated by using the down-storm flow simulator through simulating the waves with the size and the direction in the wave groove, and the down-storm flow simulator moves under the action of the moving device of the down-storm flow simulator, so that the moving path of the down-storm flow simulator can be planned, the path of the down-storm flow simulator passes through the test model structure from far to near or from near to far, the characteristics of a wind field after the waves are coupled with the down-storm flows in a moving state and the coupling load born by the test model structure can be directly measured, the randomness of the down-storm flows and the wave loads can be considered, and the real response condition of the test model structure under the coupling action of background wind and two different loads can be more accurately analyzed.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of an embodiment of a physical simulation device for coupling waves with mobile downburst according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a detail A of FIG. 1;
FIG. 4 is a schematic structural diagram of a down-stroke storm flow simulator, specifically a state diagram when an air outlet duct is communicated with a main duct;
Fig. 5 is a schematic structural diagram of the down-stroke flow simulator, specifically, a state diagram when the down-stroke flow duct is communicated with the main duct.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
Fig. 1 is a schematic structural diagram of an embodiment of a physical simulation device for coupling waves and mobile downburst according to the present invention. The mobile downburst coupled physical device of this embodiment includes a downburst simulator mobile device. The downward-striking-storm simulator moving device of the embodiment comprises longitudinal sliding plates 1 respectively positioned at two sides, a transverse sliding rail 2 is arranged between the two longitudinal sliding plates 1, a simulator mounting plate 3 in sliding fit with the transverse sliding rail 2 is arranged on the transverse sliding rail 2, and a transverse movement driving mechanism for driving the simulator mounting plate 3 to move along the transverse sliding rail 2 is arranged on the longitudinal sliding plate 1. The number of the transverse sliding rails 2 in this embodiment is two, and the two transverse sliding rails 2 are respectively arranged at two sides of the down-striking storm simulator 7.
The moving device of the down-rush current simulator of the embodiment further comprises longitudinal sliding rails 4 which are arranged in one-to-one correspondence with the longitudinal sliding plates 1, and the longitudinal sliding plates 1 are mounted on the longitudinal sliding rails 4 in a sliding fit manner; the two ends of the longitudinal slide rail 4 are respectively provided with a fixing frame 5, and the fixing frames 5 are provided with a longitudinal movement driving mechanism for driving the longitudinal slide plate 1 to move along the longitudinal slide rail 4. The number of the longitudinal sliding rails 4 in the embodiment is two, and the two longitudinal sliding rails 4 are respectively in sliding fit with the two longitudinal sliding plates 1.
The support column 6 is arranged below the fixing frame 5, and the support column 6 of the embodiment adopts a telescopic rod and comprises a sleeve rod 6a arranged below and a core rod 6b sleeved in the sleeve rod 6a in a sliding manner, so as to adjust the height of the lower storm simulator 7. Preferably, a side baffle 17 for shielding wind is arranged between the loop bars 6a of the supporting upright posts, so that the influence of wind in the horizontal direction on the experimental structure is prevented.
The simulator mounting plate 3 is provided with a lower storm flow simulator 7 for simulating lower storm flow, and in particular, the simulator mounting plate 3 is provided with a simulated air port corresponding to an air outlet of the lower storm flow simulator 7.
Further, the lateral movement driving mechanism of the present embodiment includes a lateral screw 8 disposed between the two longitudinal sliding plates 1 and parallel to the lateral slide rail 2, the lateral screw 8 is in threaded engagement with the simulator mounting plate 3, and a lateral driving motor 9 for driving the lateral screw 8 to rotate is provided on the longitudinal sliding plate 1. The simulator mounting plate 3 can be driven to move along the transverse slide rail 2 by using a threaded fit structure between the transverse screw 8 and the simulator mounting plate 3.
Further, the longitudinal movement driving mechanism of the embodiment comprises a longitudinal screw rod 10 parallel to the longitudinal slide rail 4, two ends of the longitudinal screw rod 10 are respectively and rotatably mounted on the fixing frame 5, the longitudinal screw rod 10 is in threaded fit with the longitudinal slide plate 1, and a longitudinal driving motor 11 for driving the longitudinal screw rod 10 to rotate is arranged on the fixing frame 5. By utilizing the threaded matching structure between the longitudinal screw rod 10 and the longitudinal sliding plate 1, the longitudinal sliding plate 1 can be driven to move along the longitudinal sliding rail 4, so as to drive the down-rush current simulator 7 to move longitudinally.
Further, the simulator mounting board 3 of the embodiment is provided with a simulator mounting frame 12, the simulator mounting frame 12 is provided with a vertical sliding rail 13, the lower storm simulator 7 is mounted on the vertical sliding rail 13 in a sliding fit manner, and the simulator mounting frame 12 is provided with a simulator driving mechanism for driving the lower storm simulator 7 to move along the vertical sliding rail 13. The lower storm simulator 7 of the embodiment is provided with a vertical sliding block 14 in sliding fit with the vertical sliding rail 13, the simulator driving mechanism comprises a simulator driving screw 15 parallel to the vertical sliding rail 13, the simulator driving screw 15 is in threaded fit with one of the vertical sliding blocks 14, and a simulator driving motor 16 for driving the simulator driving screw 15 to rotate is fixedly arranged on the vertical sliding rail 13. By providing the simulator drive mechanism, the lower storm simulator 7 can be driven to move along the vertical slide rail 13, and the vertical height of the lower storm simulator 7 is adjusted.
Further, the lower storm flow simulator 7 of the embodiment comprises a main air duct 18, an air outlet air duct 19 and a lower storm flow duct 20 are arranged at the air outlet end of the main air duct 18, a switching valve 21 is arranged between the air outlet air duct 19 and the lower storm flow duct 20, and the switching valve 21 is used for controlling the disconnection between the lower storm flow duct 20 and the main air duct 18 when the air outlet air duct 19 is communicated with the main air duct 18; or when the lower storm duct 20 is communicated with the main duct 18, the air outlet duct 19 is disconnected from the main duct 18. The air outlet of the lower storm air duct 20 is aligned with a simulated air port arranged on the simulator mounting plate 3, and a lower storm fan 25 is arranged in the main air duct 18. The downburst air duct 20 of the present embodiment includes a horizontal section coaxial with the main air duct 18 and a vertical section perpendicular to the main air duct 18, a flow deflector 22 is disposed between the horizontal section and the vertical section, a damping net 23 and a honeycomb 24 are disposed in the vertical section, and the honeycomb 24 is disposed below the damping net 23. In normal operation, the air outlet duct 19 is communicated with the main duct 18, and the lower storm duct 20 is disconnected from the main duct 18; when the downward storm flow needs to be simulated, the downward storm flow channel 20 is communicated with the main air channel 18 through the switching valve 21, and the air outlet channel 19 is disconnected from the main air channel 18, so that the downward storm flow can be output; of course, the switching frequency of the switching valve 21 is controlled, i.e. the downburst gust can be simulated, i.e. the downburst simulator 7 of the present embodiment can simulate both downburst and downburst gusts.
The physical simulation method for wave and mobile downward storm coupling by adopting the physical simulation device for wave and mobile downward storm coupling of the embodiment comprises the following steps:
1) Mounting the test pattern structure in the wave trough 26;
2) Opening the wave groove 26, forming waves with set directions and sizes in the wave groove 26, and measuring the load applied by the test model structure under the action of the waves; the wave groove 26 in this embodiment is provided with a bottom vibration box 26a and a side vibration box 26b, and high-frequency pulse signals are respectively input to the bottom vibration box 26a and the side vibration box 26b, so that waves with different directions and sizes can be simulated in the wave groove 26, and the load of the test model structure under the action of the waves is measured by adopting a pressure scanning valve;
3) Starting a lower storm flow simulator 7 to simulate the lower storm flow with the set wind power, setting the moving path of the lower storm flow simulator 7, driving the lower storm flow simulator 7 to move by using a lower storm flow simulator moving device, and enabling the moving path of the lower storm flow simulator 7 to pass through a test model structure from far to near or from near to far;
4) And measuring the characteristics of the wind field after the waves are coupled with the downburst wind field in a moving state and the coupling load of the test model structure under different distance conditions of the downburst wind field. In the embodiment, a cobra wind speed detector is used for measuring the characteristics of a wind field after coupling of waves and downburst flows in a moving state, and a pressure scanning valve is used for measuring the coupling load born by a test model structure.
According to the physical simulation method for coupling the waves and the movable down-storm flows, the down-storm flows are simulated by the down-storm flow simulator through simulating the waves with the size and the direction in the wave groove, and the down-storm flow simulator moves under the action of the moving device of the down-storm flow simulator, so that the moving path of the down-storm flow simulator can be planned, the path of the down-storm flow simulator passes through the test model structure from far to near or from near to far, the characteristics of wind fields after the waves are coupled with the down-storm flows in a moving state and the coupling load born by the test model structure can be directly measured, the randomness of the down-storm flows and the wave load can be considered, and the real response condition of the test model structure under the coupling action of background wind and two different loads can be more accurately analyzed.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (1)
1. A physical simulation method for coupling wave and movable downward storm is characterized in that: the method comprises the following steps:
1) Installing the test model structure in the wave groove;
2) Opening the wave groove, forming waves with set directions and sizes in the wave groove, and measuring the load applied to the test model structure under the action of the waves;
3) Starting a down-rush current simulator to simulate the down-rush current with the set wind power, setting a moving path of the down-rush current simulator, driving the down-rush current simulator to move by using a moving device of the down-rush current simulator, and enabling the moving path of the down-rush current simulator to pass through a test model structure from far to near or from near to far;
4) Measuring the characteristics of the wind field after the waves are coupled with the downburst wind field in a moving state and the coupling load of the test model structure under different distance conditions of the downburst wind field;
The method is realized by adopting a physical simulation device of wave and mobile downward storm coupling, the physical simulation device of wave and mobile downward storm coupling comprises a wave groove and a downward storm simulator moving device arranged above the wave groove, the downward storm simulator moving device comprises longitudinal sliding plates (1) respectively positioned at two sides, a transverse sliding rail (2) is arranged between the two longitudinal sliding plates (1), a simulator mounting plate (3) in sliding fit with the transverse sliding rail (2) is arranged on the transverse sliding rail (2), and a transverse movement driving mechanism for driving the simulator mounting plate (3) to move along the transverse sliding rail (2) is arranged on the longitudinal sliding plate (1);
The sliding device further comprises longitudinal sliding rails (4) which are arranged in one-to-one correspondence with the longitudinal sliding plates (1), and the longitudinal sliding plates (1) are installed on the longitudinal sliding rails (4) in a sliding fit manner; the two ends of the longitudinal sliding rail (4) are respectively provided with a fixing frame (5), and the fixing frames (5) are provided with a longitudinal movement driving mechanism for driving the longitudinal sliding plate (1) to move along the longitudinal sliding rail (4);
a supporting upright post (6) is arranged below the fixing frame (5);
a down-surge flow simulator (7) for simulating down-surge flow is arranged on the simulator mounting plate (3);
The simulator comprises a simulator mounting plate (3), wherein a simulator mounting frame (12) is arranged on the simulator mounting plate (12), a vertical sliding rail (13) is arranged on the simulator mounting frame (12), the lower storm flow simulator (7) is mounted on the vertical sliding rail (13) in a sliding fit manner, and a simulator driving mechanism for driving the lower storm flow simulator (7) to move along the vertical sliding rail (13) is arranged on the simulator mounting frame (12);
The lower storm flow simulator (7) is provided with a vertical sliding block (14) which is in sliding fit with the vertical sliding rail (13), the simulator driving mechanism comprises a simulator driving screw rod (15) which is parallel to the vertical sliding rail (13), the simulator driving screw rod (15) is in threaded fit with one of the vertical sliding blocks (14), and a simulator driving motor (16) for driving the simulator driving screw rod (15) to rotate is fixedly arranged on the vertical sliding rail (13);
In the step 2), a bottom vibration box and a side vibration box are arranged in the wave groove, high-frequency pulsation signals are respectively input to the bottom vibration box and the side vibration box, waves in different directions and sizes can be simulated in the wave groove, and a pressure scanning valve is adopted to measure the load applied to the test model structure under the action of the waves;
In the step 4), a cobra wind speed detector is adopted to measure the characteristics of a wind field after the coupling of waves and downburst flows in a moving state, and a pressure scanning valve is utilized to measure the coupling load born by a test model structure;
The transverse movement driving mechanism comprises transverse screws (8) which are arranged between the two longitudinal sliding plates (1) and are parallel to the transverse sliding rails (2), the transverse screws (8) are in threaded fit with the simulator mounting plates (3), and the longitudinal sliding plates (1) are provided with transverse driving motors (9) for driving the transverse screws (8) to rotate;
The longitudinal movement driving mechanism comprises a longitudinal screw rod (10) which is parallel to the longitudinal sliding rail (4), two ends of the longitudinal screw rod (10) are respectively and rotatably matched and installed on the fixing frame (5), the longitudinal screw rod (10) is in threaded fit with the longitudinal sliding plate (1), and the fixing frame (5) is provided with a longitudinal driving motor (11) for driving the longitudinal screw rod (10) to rotate;
the support upright post (6) adopts a telescopic rod and comprises a loop bar (6 a) positioned below and a core bar (6 b) sleeved in the loop bar (6 a) in a sliding way;
A side baffle (17) for shielding wind is arranged between the loop bars (6 a) of the supporting upright posts;
the lower storm flow simulator (7) comprises a main air duct (18), an air outlet air duct (19) and a lower storm flow air duct (20) are arranged at the air outlet end of the main air duct (18), a switching valve (21) is arranged between the air outlet air duct (19) and the lower storm flow air duct (20), and the switching valve (21) is used for controlling the disconnection between the lower storm flow air duct (20) and the main air duct (18) when the air outlet air duct (19) is communicated with the main air duct (18); or when the lower explosion flow air duct (20) is communicated with the main air duct (18), the air outlet air duct (19) is disconnected with the main air duct (18);
an air outlet of the lower storm air duct (20) is aligned with a simulated air outlet arranged on the simulator mounting plate (3), and a lower storm fan (25) is arranged in the main air duct (18); the lower storm air duct (20) comprises a horizontal section and a vertical section, wherein the horizontal section is coaxial with the main air duct (18), the vertical section is perpendicular to the main air duct (18), a guide vane (22) is arranged between the horizontal section and the vertical section, a damping net (23) and a honeycomb device (24) are arranged in the vertical section, and the honeycomb device (24) is located below the damping net (23).
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| CN201910436501.7A CN110044580B (en) | 2019-05-23 | 2019-05-23 | Physical simulation method and device for coupling wave and movable downward storm |
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