CN115042935A - Water-entering slamming test device for six-degree-of-freedom motion of structure - Google Patents
Water-entering slamming test device for six-degree-of-freedom motion of structure Download PDFInfo
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- CN115042935A CN115042935A CN202210718741.8A CN202210718741A CN115042935A CN 115042935 A CN115042935 A CN 115042935A CN 202210718741 A CN202210718741 A CN 202210718741A CN 115042935 A CN115042935 A CN 115042935A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/20—Designing vessels; Predicting their performance using towing tanks or model basins for designing
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Abstract
The invention discloses a water-entering slamming test device for six-degree-of-freedom movement of a structure, which comprises a longitudinal movement device, a transverse movement device, a vertical movement device, a horizontal plane rotation device and an omnidirectional rotation device, wherein the longitudinal movement device, the transverse movement device, the vertical movement device, the horizontal plane rotation device and the omnidirectional rotation device are arranged on a main truss. The longitudinal movement device comprises a longitudinal guide rail, a cross beam, a longitudinal moving platform, a longitudinal driving motor and a longitudinal driving roller; the transverse motion device comprises a transverse guide rail, a transverse moving platform, a transverse driving motor, a transverse driving gear and a transverse rack; the vertical movement device comprises a heave rod, an inner shaft sleeve, an outer shaft sleeve, a vertical driving motor, a vertical driving gear, a vertical rack and a rack supporting arm; the horizontal plane rotating device comprises a horizontal rotating motor, a horizontal driving gear, a horizontal driven gear and a transmission chain; the omnidirectional rotating device comprises a cantilever rod, a spherical joint mortar, a ball joint rod, a model mounting platform and a hydraulic telescopic rod. The test piece can slam with the fluid in any specified degree of freedom of movement and velocity.
Description
Technical Field
The invention relates to the technical field of structure water-entering slamming tests, in particular to a water-entering slamming test device for six-degree-of-freedom motion of a structure.
Background
Ships and marine structures in service in severe sea conditions inevitably slam against waves, and marine accidents in which the structures are disabled or destroyed due to severe slamming loads occur. Slamming, which involves the interaction of a fluid with a structure, is a strong nonlinear transient fluid-solid coupling problem. The water-entry slamming test of typical structures (e.g., panels, wedges, spheres, partial hulls, etc.) is the classic research in the field of marine and marine engineering.
The slamming load test is an effective and reliable method for researching the fluid-solid coupling problem of the structure in the water process. The conventional falling body water-entering slamming load test device can only realize the vertical single-degree-of-freedom motion of a structure generally, and can not simulate the motion and speed control of other degrees of freedom of the structure. The actual ship generates six-degree-of-freedom swaying motion and slams with waves when sailing in the sea, so that the research of the multi-degree-of-freedom water slamming test is necessary.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a water inlet slamming test device for six-degree-of-freedom movement of a structure, so that a test piece can move according to any specified degree of freedom and speed of movement and slam with fluid in the water inlet and outlet processes.
The purpose of the invention can be realized by the following technical scheme: a water-entering slamming test device for six-degree-of-freedom movement of a structure comprises a longitudinal movement device, a transverse movement device, a vertical movement device, a horizontal plane rotation device and an omnidirectional rotation device, wherein the longitudinal movement device, the transverse movement device, the vertical movement device, the horizontal plane rotation device and the omnidirectional rotation device are arranged on a main truss;
the longitudinal movement device comprises a longitudinal guide rail, a cross beam, a longitudinal moving platform, a longitudinal driving motor and a longitudinal driving roller; the two longitudinal guide rails are arranged in parallel, and the two cross beams are vertically arranged between the two longitudinal guide rails; the longitudinal guide rail is provided with a longitudinal groove, and the cross beam is connected with the longitudinal guide rail in a sliding manner; the two longitudinal moving platforms are respectively arranged at the outer sides of the two longitudinal guide rails and connected with the cross beam; the longitudinal driving motor is arranged on one longitudinal moving platform, a longitudinal driving roller is arranged on an output shaft of the longitudinal driving motor, and the longitudinal driving roller is placed in the longitudinal groove;
the transverse movement device comprises a transverse guide rail, a transverse moving platform, a transverse driving motor, a transverse driving gear and a transverse rack; the two transverse guide rails are arranged on the cross beam; the transverse moving platform is connected with the transverse guide rail in a sliding manner; the transverse driving motor is arranged on the other longitudinal moving platform, a transverse driving gear is arranged on an output shaft of the transverse driving motor, a transverse rack is fixed on the transverse moving platform, and the transverse driving gear is meshed with the transverse rack;
the vertical motion device comprises a heave rod, an inner shaft sleeve, an outer shaft sleeve, a vertical driving motor, a vertical driving gear, a vertical rack and a rack supporting arm; the vertical driving motor is arranged on the transverse moving platform, a vertical driving gear is arranged on an output shaft of the vertical driving motor, two ends of a vertical rack are respectively connected with the vertical swinging rod through rack supporting arms, and the vertical driving gear is meshed with the vertical rack;
the horizontal plane rotating device comprises a horizontal rotating motor, a horizontal driving gear, a horizontal driven gear and a transmission chain; the horizontal rotating motor is arranged on the transverse moving platform, and a horizontal driving gear is arranged on an output shaft of the horizontal rotating motor; the horizontal driven gear is sleeved on the inner shaft sleeve, and the horizontal driving gear is connected with the horizontal driven gear through a transmission chain;
the omnidirectional rotating device comprises a cantilever rod, a spherical joint mortar, a ball joint rod, a model mounting platform and a hydraulic telescopic rod; one end of each cantilever rod is connected with the heave rod, and the spherical joint mortar is arranged at the bottom end of the heave rod; one end of the ball joint rod is embedded into the spherical joint mortar, and the other end of the ball joint rod is connected with the model mounting platform; one end of each hydraulic telescopic rod is hinged with the tail end of the cantilever rod, and the other end of each hydraulic telescopic rod is hinged with the ball joint rod.
Furthermore, longitudinal sliding blocks are fixedly mounted at two ends of the two cross beams, the longitudinal moving platform is connected with the cross beams through the longitudinal sliding blocks, longitudinal driven rollers are arranged on the longitudinal sliding blocks, and the longitudinal driven rollers are placed in the longitudinal grooves.
Furthermore, a longitudinal rack is arranged in the longitudinal groove, the longitudinal driving roller and the longitudinal driven roller are gears, and the longitudinal driving roller and the longitudinal driven roller are respectively meshed with the longitudinal rack.
Furthermore, the transverse movement device further comprises a transverse sliding block and a transverse driven roller, a transverse groove is formed in the transverse guide rail, the transverse sliding block is installed on the transverse moving platform, the transverse driven roller is installed on the transverse sliding block, and the transverse driven roller is placed in the transverse groove.
Further, the rack support arm is connected with the heave bar through a bearing.
Furthermore, the number of the cantilever rods is three, and the three cantilever rods are uniformly arranged.
Further, a wedge-shaped body model test piece is arranged below the model mounting platform.
Furthermore, the main truss comprises four longitudinal connecting rods, four transverse connecting rods and four vertical connecting rods, and the longitudinal connecting rods, the transverse connecting rods and the vertical connecting rods are connected to form a cuboid frame structure.
Furthermore, the longitudinal connecting rod, the transverse connecting rod and the vertical connecting rod are steel pipes with square sections.
Further, the test device is installed on the guide rail of the pool navigation vehicle.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the structure test piece can enter water according to any given six-degree-of-freedom motion (including vertical motion, horizontal motion, pitching motion, rolling motion and yawing motion) and speed in the water inlet and outlet process.
2. The six-degree-of-freedom motion of the structure test piece in the water inlet and outlet process can be actively controlled by arranging the driving devices such as the motor, and the defects that the conventional device can only provide the initial water inlet speed by depending on the gravity action in the falling process, the speed in the water inlet process is uncontrollable, and the like are overcome.
3. The device can be installed in a conventional ship model towing tank and is connected with a guide rail of a navigation vehicle on the tank. Through the wave environment simulated by the wave making machine in the towing tank, the slamming load test of the structure test piece in still water can be realized, and the slamming load test of the structure test piece in the wave environment can also be realized.
Drawings
FIG. 1 is a structural view of a test apparatus in an embodiment of the present invention;
FIG. 2 is a view showing a structure of a main truss according to an embodiment of the present invention;
FIG. 3 is a block diagram of a longitudinal movement means and a lateral movement means in an embodiment of the present invention;
FIG. 4 is a structural view of a longitudinal movement device, a lateral movement device, a vertical movement device, and a horizontal rotation device in an embodiment of the present invention;
FIG. 5 is a block diagram of a vertical motion device and a horizontal rotation device in an embodiment of the present invention;
FIG. 6 is a partial view of a horizontal plane turning device according to an embodiment of the present invention;
fig. 7 is a structural view of an omnidirectional rotating apparatus in an embodiment of the present invention.
Wherein: 1: longitudinal link, 2: transverse link, 3: vertical connecting rod, 4: longitudinal guide rail, 5: cross member, 6: longitudinal moving platform, 7: longitudinal slide, 8: longitudinal driving motor, 9: longitudinal driving roller, 10: longitudinal driven roller, 11: cross rail, 12: lateral movement platform, 13: transverse drive motor, 14: transverse drive gear, 15: lateral rack, 16: heave bar, 17: inner sleeve, 18: outer sleeve, 19: vertical drive motor, 20: rack support arm, 21: bearing, 22: horizontal rotation motor, 23: horizontal driven gear, 24: drive chain, 25: cantilever rod, 26: spherical joint socket, 27: ball joint rod, 28: model mounting platform, 29: hydraulic telescoping rod, 30: articulated joint, 31: wedge model specimen, 32: lateral slider, 33: lateral driven roller, 34: vertical drive gear, 35: vertical rack, 36: a horizontal drive gear.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
A water-entering slamming test device for six-degree-of-freedom movement of a structure comprises a main truss, a longitudinal movement device, a transverse movement device, a vertical movement device, a horizontal plane rotation device and an omnidirectional rotation device.
The main truss comprises four longitudinal connecting rods 1, four transverse connecting rods 2 and four vertical connecting rods 3, and the longitudinal connecting rods, the transverse connecting rods and the vertical connecting rods are connected to form a cuboid frame structure. The longitudinal connecting rod, the transverse connecting rod and the vertical connecting rod are made of steel pipes with square sections.
The longitudinal movement device comprises a longitudinal guide rail 4, a cross beam 5, a longitudinal moving platform 6, a longitudinal sliding block 7, a longitudinal driving motor 8, a longitudinal driving roller 9 and a longitudinal driven roller 10. The two longitudinal guide rails are positioned right above the two longitudinal connecting rods at the upper part of the main truss and are arranged in parallel with the longitudinal connecting rods. The two cross beams are vertically arranged between the two longitudinal guide rails. The two ends of the two beams are fixedly provided with longitudinal sliding blocks, and the longitudinal sliding blocks wrap the longitudinal guide rails and can move horizontally along the longitudinal guide rails. The two longitudinal moving platforms are respectively arranged at the outer sides of the two longitudinal guide rails and connected with the outer sides of the longitudinal sliding blocks. The two longitudinal moving platforms and the two cross beams form a frame structure under the connection of the longitudinal sliding blocks, and the frame structure can translate along the longitudinal guide rails without constraint. The longitudinal driving motor is installed on one longitudinal moving platform, a longitudinal driving roller is arranged on an output shaft of the longitudinal driving motor, a longitudinal groove is formed in the longitudinal guide rail, the longitudinal driving roller is placed in the longitudinal groove, and the longitudinal groove serves as a moving track of the longitudinal driving roller. The longitudinal slide block is provided with a longitudinal driven roller, so that the friction force of longitudinal movement is reduced. The bottom parts of the longitudinal driving roller and the longitudinal driven roller are tangent to the bottom surface of the longitudinal groove. In the embodiment, the longitudinal rack is arranged on the bottom surface of the longitudinal groove, and the longitudinal driving roller and the longitudinal driven roller are in a gear form, so that the stability of the rollers in sliding in the longitudinal guide rail is improved, and the relative sliding and idle running of the rollers are prevented.
The transverse movement device comprises a transverse guide rail 11, a transverse moving platform 12, a transverse driving motor 13, a transverse driving gear 14, a transverse rack 15, a transverse sliding block 32 and a transverse driven roller 33. The two transverse guide rails are respectively positioned right above the two cross beams and are arranged in parallel with the cross beams. And a transverse groove is arranged on the transverse guide rail and is used as a moving track of the transverse driven roller. And the transverse sliding block is fixedly arranged on the transverse moving platform, wraps the transverse guide rail and can translate along the transverse guide rail. And a transverse driven roller is arranged on the transverse sliding block and is positioned in the transverse groove. The transverse driving motor is installed on the other longitudinal moving platform, and a transverse driving gear is arranged on an output shaft of the transverse driving motor. The transverse rack is fixed on the transverse moving platform, and the transverse driving gear is meshed with the transverse rack, so that transverse motion control of the transverse moving platform is realized under the action of the transverse driving motor.
The vertical movement device comprises a heave rod 16, an inner shaft sleeve 17, an outer shaft sleeve 18, a vertical driving motor 19, a vertical driving gear 34, a vertical rack 35, a rack supporting arm 20 and a bearing 21. The outer shaft sleeve is fixedly arranged at the center of the transverse moving platform and penetrates through the upper surface and the lower surface of the transverse moving platform. The section of the heave rod is in a circular shape provided with a groove channel, the groove channel of the heave rod penetrates through the length of the whole rod, and the heave rod is provided with four groove channels which are uniformly distributed along the circumference. The inner shaft sleeve is rotatably sleeved on the inner side of the outer shaft sleeve, the inner shaft sleeve and the outer shaft sleeve are matched to form a rotary bearing, and the inner shaft sleeve and the outer shaft sleeve can rotate without constraint but cannot move with other degrees of freedom. The inner shaft sleeve is in a hollow tubular shape, and four keys are arranged on the circular section of the inner wall of the inner shaft sleeve and can be matched with four concave channels of the heave bar. The heave rod is connected with the inner shaft sleeve through the key slot, so that the unconstrained relative motion in the vertical direction can be generated, but the relative rotation cannot be generated. The vertical driving motor is installed on one side of the transverse moving platform, and a vertical driving gear is arranged on an output shaft of the vertical driving motor. The upper end and the lower end of the vertical rack are fixedly connected with rack supporting arms, and the other ends of the rack supporting arms are connected with the heave rod through bearings. Under the action of the bearing, the rack support arm and the heave rod only perform unconstrained rotary motion, but cannot perform other degrees of freedom motion. The transverse moving platform is provided with a rectangular hole for the vertical rack to pass through, and the width of the hole is slightly larger than the width of the vertical rack, so that the vertical movement of the vertical rack is not limited, and the transverse moving of the vertical rack can be prevented. The vertical driving gear is meshed with the vertical rack, so that the vertical motion control of the heaving rod is realized under the action of the vertical driving motor.
The horizontal plane rotating device comprises a horizontal rotating motor 22, a horizontal driving gear 36, a horizontal driven gear 23 and a transmission chain 24. The horizontal rotating motor is installed on the other side of the transverse moving platform, a horizontal driving gear is arranged on an output shaft of the horizontal rotating motor, a horizontal driven gear sleeve is arranged on the inner shaft sleeve, and the horizontal driving gear is connected with the horizontal driven gear through a transmission chain, so that the horizontal rotation control of the vertical swinging rod is realized under the action of the horizontal rotating motor.
The omnidirectional rotation device comprises a cantilever rod 25, a spherical joint mortar 26, a ball joint rod 27, a model mounting platform 28, a hydraulic telescopic rod 29 and an articulated joint 30. The three cantilever rods are arranged along the horizontal direction, and one ends of the three cantilever rods are respectively arranged on the heave rods. The three cantilever rods are uniformly arranged in the circumferential range of the outer surface of the heave rod, and the included angles are all 120 degrees. The spherical joint mortar is arranged at the bottom end of the heave rod. The ball head at one end of the ball head joint rod is embedded into the spherical joint mortar to form an omnidirectional rotating joint, and the other end of the ball head joint rod is connected with the model mounting platform. A wedge model test piece 31 is installed below the model installation platform. One end of each hydraulic telescopic rod is connected with the tail end of the cantilever rod through a hinged joint, and the other end of each hydraulic telescopic rod is connected with the ball joint rod through a hinged joint. Through the cooperation of the three hydraulic telescopic rods, the control over the transverse rocking, the longitudinal rocking and the partial horizontal rotation of the model installation platform and the wedge-shaped body model test piece can be realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A water-entering slamming test device for six-degree-of-freedom movement of a structure is characterized by comprising a longitudinal movement device, a transverse movement device, a vertical movement device, a horizontal plane rotation device and an omnidirectional rotation device, wherein the longitudinal movement device, the transverse movement device, the vertical movement device, the horizontal plane rotation device and the omnidirectional rotation device are arranged on a main truss;
the longitudinal movement device comprises a longitudinal guide rail, a cross beam, a longitudinal moving platform, a longitudinal driving motor and a longitudinal driving roller; the two longitudinal guide rails are arranged in parallel, and the two cross beams are vertically arranged between the two longitudinal guide rails; the longitudinal guide rail is provided with a longitudinal groove, and the cross beam is connected with the longitudinal guide rail in a sliding manner; the two longitudinal moving platforms are respectively arranged at the outer sides of the two longitudinal guide rails and connected with the cross beam; the longitudinal driving motor is arranged on one longitudinal moving platform, a longitudinal driving roller is arranged on an output shaft of the longitudinal driving motor, and the longitudinal driving roller is placed in the longitudinal groove;
the transverse motion device comprises a transverse guide rail, a transverse moving platform, a transverse driving motor, a transverse driving gear and a transverse rack; the two transverse guide rails are arranged on the cross beam; the transverse moving platform is connected with the transverse guide rail in a sliding manner; the transverse driving motor is arranged on the other longitudinal moving platform, a transverse driving gear is arranged on an output shaft of the transverse driving motor, a transverse rack is fixed on the transverse moving platform, and the transverse driving gear is meshed with the transverse rack;
the vertical motion device comprises a heave rod, an inner shaft sleeve, an outer shaft sleeve, a vertical driving motor, a vertical driving gear, a vertical rack and a rack supporting arm; the vertical driving motor is arranged on the transverse moving platform, a vertical driving gear is arranged on an output shaft of the vertical driving motor, two ends of a vertical rack are respectively connected with the vertical swinging rod through rack supporting arms, and the vertical driving gear is meshed with the vertical rack;
the horizontal plane rotating device comprises a horizontal rotating motor, a horizontal driving gear, a horizontal driven gear and a transmission chain; the horizontal rotating motor is arranged on the transverse moving platform, and a horizontal driving gear is arranged on an output shaft of the horizontal rotating motor; the horizontal driven gear is sleeved on the inner shaft sleeve, and the horizontal driving gear is connected with the horizontal driven gear through a transmission chain;
the omnidirectional rotating device comprises a cantilever rod, a spherical joint mortar, a ball joint rod, a model mounting platform and a hydraulic telescopic rod; one end of each cantilever rod is connected with the heave rod, and the spherical joint mortar is arranged at the bottom end of the heave rod; one end of the ball joint rod is embedded into the spherical joint mortar, and the other end of the ball joint rod is connected with the model mounting platform; one end of each hydraulic telescopic rod is hinged with the tail end of the cantilever rod, and the other end of each hydraulic telescopic rod is hinged with the ball joint rod.
2. The water inlet slamming test device for six-degree-of-freedom motion of a structure as claimed in claim 1, wherein two ends of two beams are fixedly provided with longitudinal sliding blocks, the longitudinal moving platform is connected with the beams through the longitudinal sliding blocks, the longitudinal sliding blocks are provided with longitudinal driven rollers, and the longitudinal driven rollers are placed in the longitudinal grooves.
3. The apparatus of claim 2, wherein the longitudinal groove is provided with a longitudinal rack, the longitudinal driving roller and the longitudinal driven roller are gears, and the longitudinal driving roller and the longitudinal driven roller are respectively engaged with the longitudinal rack.
4. The apparatus of claim 1, wherein the lateral motion device further comprises a lateral slide block and a lateral follower roller, the lateral guide rail is provided with a lateral groove, the lateral slide block is mounted on the lateral moving platform, the lateral follower roller is mounted on the lateral slide block, and the lateral follower roller is disposed in the lateral groove.
5. The apparatus of claim 1 wherein the rack support arm is coupled to the heave bar by a bearing.
6. The apparatus of claim 1 wherein the number of cantilever bars is three, and the three cantilever bars are arranged uniformly.
7. The six-degree-of-freedom motion water-entering slamming test device for the structure as claimed in claim 1, wherein a wedge-shaped body model test piece is mounted below the model mounting platform.
8. The device for the six-degree-of-freedom motion water-entering slamming test of the structure according to claim 1, wherein the main body truss comprises four longitudinal connecting rods, four transverse connecting rods and four vertical connecting rods, and the longitudinal connecting rods, the transverse connecting rods and the vertical connecting rods are connected to form a rectangular frame structure.
9. The apparatus of claim 8, wherein the longitudinal, transverse and vertical links are steel pipes with square cross-sections.
10. The apparatus of claim 1 wherein the apparatus is mounted on a pool car guideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210718741.8A CN115042935B (en) | 2022-06-23 | 2022-06-23 | Water-entering slamming test device for six-degree-of-freedom movement of structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210718741.8A CN115042935B (en) | 2022-06-23 | 2022-06-23 | Water-entering slamming test device for six-degree-of-freedom movement of structure |
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| CN115042935A true CN115042935A (en) | 2022-09-13 |
| CN115042935B CN115042935B (en) | 2023-08-18 |
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| CN115848581A (en) * | 2022-12-05 | 2023-03-28 | 华南理工大学 | Aircraft experimental platform capable of realizing multi-attitude motion of aircraft |
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| Publication number | Publication date |
|---|---|
| CN115042935B (en) | 2023-08-18 |
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