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CN-121977774-A - Device and method for testing vibration performance of underwater towing rope

CN121977774ACN 121977774 ACN121977774 ACN 121977774ACN-121977774-A

Abstract

The invention discloses an underwater towing rope vibration performance testing device and method, wherein a steel wire rope pulling force is applied by a winch, when a pretension force reaches a set value, a shaft end locking mechanism locks a corresponding steel wire rope winding shaft to realize accurate application of pulling force, the two ends of a towing rope are changed from rigid connection to connection by a split type sealed rotary towing rope connector to realize quick disassembly and assembly of the towing rope, torsional stress can be released, the sealing performance of the towing rope connector can be better adapted to a long-term underwater environment, meanwhile, the winch is provided with a plurality of independently controlled steel wire rope winding shafts, the prestress of each towing rope can be accurately applied to the same preset pulling force, finally, all the tested towing rope pulling forces are completely consistent, testing of a plurality of towing ropes is realized, and the testing efficiency is remarkably improved. The invention realizes the efficient and accurate test of the vibration performance of the underwater towing rope.

Inventors

  • TANG JICHENG
  • YAO SITONG
  • ZHAO XINGHUA
  • Ma Houbiao
  • TIAN ALI

Assignees

  • 江苏科技大学

Dates

Publication Date
20260505
Application Date
20260203

Claims (10)

  1. 1. The device for testing the vibration performance of the underwater towing rope is characterized by comprising a water tank (3), an output end sensor mounting plate (9), an input end sensor mounting plate (12), a vibration exciter (16) and a split towing rope connector (10) with rotating and sealing functions, wherein a water tank outlet (6) and a water tank inlet (18) are respectively arranged at two ends of the water tank (3), an annular water distribution pipeline and a water pump (17) are arranged between the water tank outlet and the water tank inlet, and the water pump (17) is used for regulating the water flow speed in the water tank (3); The top of the pool (3) is provided with a trailer (1) which can move along the length direction and has a position locking function, one end of a towing rope (11) is connected with an output end sensor mounting plate (9) through a towing rope connector (10) and a first pull ring (19), the other end of the towing rope (11) is connected with an input end sensor mounting plate (12) through the towing rope connector (10) and a second pull ring (20), and a plurality of towing ropes (11) share one input end sensor mounting plate (12); a winch (2) with a plurality of independently controlled wire rope winding shafts (5) is arranged on the trailer (1), the wire ropes (8) are wound on the wire rope winding shafts (5), each wire rope winding shaft (5) corresponds to one towing rope (11) to be tested, and each wire rope winding shaft (5) is provided with an independent shaft end locking mechanism (21) for locking the corresponding wire rope winding shaft (5) when the pretension of the wire rope (8) reaches a set value; A support (4) is fixed on a trailer (1), pulleys (7) are arranged at positions, corresponding to each towing rope (11), of the upper end and the lower end of the support (4) and used for changing the direction of a steel wire rope (8) to enable the steel wire rope to be kept horizontal in water, one end of the steel wire rope (8) is connected with a steel wire rope winding shaft (5), the other end of the steel wire rope is connected with a first pull ring (19), a vibration exciter (16) is fixed on a vibration exciter fixing steel frame (14), the vibration exciter fixing steel frame (14) is straddled and fixed on the top of a pool (3), the vibration exciter (16) is used for applying excitation to an input end sensor mounting plate (12), input end steel wire rope fixing steel frames (15) are fixed on the outer sides of the vibration exciter fixing steel frame (14) and are arranged at positions, corresponding to the lower ends of the steel wire rope fixing steel wire ropes (15), corresponding to the steel wire ropes (11) to be detected, of the pulleys (7) are equal in height, the tops of the steel wire rope fixing steel wire ropes (15) are corresponding to the pulleys (7) at the positions corresponding to the pulleys (7) of the lower ends of the support (4), and the steel wire ropes (20) are fixed on the fixing seats of the steel wire ropes (8) after the steel wire ropes (20) are fixed through bolts.
  2. 2. The underwater streamer vibration performance testing device according to claim 1, wherein the edges of the top two sides of the pool (3) are fixed with rails by pre-buried steel plates, and the trailer (1) is arranged on the rails of the two sides.
  3. 3. The underwater towing rope vibration performance testing device according to claim 1, wherein the input end sensor mounting plate (12) is T-shaped and is provided with a vertical plate extending upwards, a magnet head at the front end of the vibration exciter (16) is attracted to the vertical plate above the input end sensor mounting plate (12), two nylon ropes (13) are bound to the vertical plate above the input end sensor mounting plate (12), and the other ends of the two nylon ropes (13) are pulled tightly after being bound with weights and are respectively placed on the ground at two sides of the pool (3).
  4. 4. The underwater towing cable vibration performance testing device according to claim 1, wherein the towing cable connector (10) comprises a small cylindrical block and a large cylinder, the outer diameter of the small cylindrical block is consistent with that of the towing cable (11), a screw hole for adapting to a pull ring is formed in the center of the outer end face of the small cylindrical block, first convex rings are arranged on the circumferential face of the small cylindrical block and the circumferential face of the towing cable (11), the large cylinder is of a two-piece structure, second convex rings are arranged at two ends of the inner wall of the large cylinder, the inner diameter of the second convex rings are matched with the small cylindrical block and the towing cable (11), the two parts of the large cylinder are combined in pairs and fixed through screws, two first convex rings are located on the inner sides of the two second convex rings, an O-shaped sealing ring is embedded on the first convex rings of each of the small cylindrical block and the towing cable (11), the small cylindrical block and the inner wall of the large cylinder form tight sliding fit, and the first pull ring (19) or the second pull ring (20) penetrates through corresponding sensor mounting plates to be connected with the small cylindrical block of the connector (10) through threads.
  5. 5. The underwater streamer vibration performance testing apparatus as claimed in claim 1, wherein mounting holes for fixing the acceleration sensor are reserved on the output end sensor mounting plate (9) and the input end sensor mounting plate (12).
  6. 6. The underwater streamer vibration performance testing apparatus as claimed in claim 1, wherein the winch (2) has a plurality of power output ends and a plurality of intermediate transmission shafts (23), the intermediate transmission shafts (23) being disposed between the power output ends and the wire rope winding shaft (5) for manually operating to effect the clutching between the power output ends and the wire rope winding shaft (5), and the intermediate transmission shafts (23) being manually disengaged from the wire rope winding shaft (5) when the tension of the wire rope (8) reaches a set value.
  7. 7. The device for testing the vibration performance of the underwater towing rope according to claim 1, wherein the tension of the steel wire rope (8) is obtained through torque conversion detected by strain gauges attached to the winding shaft (5) of the steel wire rope.
  8. 8. The underwater streamer vibration performance testing apparatus according to claim 1, wherein the shaft end locking mechanism (21) has a motor and a stopper tooth driven by the motor to rotate, and is capable of locking the wire rope winding shaft (5) when the stopper tooth is fitted to a transmission gear at the end of the wire rope winding shaft (5).
  9. 9. The underwater towing line vibration performance testing device according to claim 1, wherein a stable triangular structure is formed below the input end steel wire rope fixing steel frame (15) through an inclined rib plate so as to offset the tension overturning moment.
  10. 10. A method of testing the vibration performance of an underwater streamer, using the device for testing the vibration performance of an underwater streamer as claimed in any one of claims 1 to 9, comprising: s1, installing a plurality of towing cables (11) to be tested at one time, connecting two ends of the plurality of towing cables (11) to be tested with corresponding sensor mounting plates and pull rings through towing cable connectors (10) respectively, and installing acceleration sensors on the sensor mounting plates; S2, parking the trailer (1) to the outer distance of the longest towing rope (11), locking, and controlling the winch (2) to apply the prestress of each towing rope (11) to a set value respectively; s3, controlling a water pump (17) to adjust the water flow speed according to the requirement; S4, synchronously applying the prestress in each towing rope (11) to the needed prestress by the winch (2), starting the vibration exciter (16), and after the vibration exciter (16) is stabilized, carrying out data acquisition, and closing the vibration exciter (16) after the acquisition is completed; and S5, adjusting the water pump (17), the winch (2) and the vibration exciter (16) according to the working conditions and repeating the step S4 to finish the test of all the working conditions.

Description

Device and method for testing vibration performance of underwater towing rope Technical Field The invention relates to a testing device and a testing method, in particular to a device and a method for testing vibration performance of an underwater towing rope. Background In a towed sonar system, the towing vibration isolation section can reduce the influence of vibration on sonar equipment and improve the working stability and data reliability of the sonar equipment. Therefore, it is clearly important to study the underwater vibration reduction and isolation performance of the streamer vibration isolation section. The underwater vibration performance test of the towing rope is the most effective way for obtaining the vibration reduction and isolation performance of the towing rope vibration isolation section. The existing testing device changes the tension of a steel wire rope through a chain block, excitation is applied through an exciter, and data reflecting the vibration reduction and isolation performance of a towing rope vibration isolation section are obtained through an acceleration sensor. The technical problems are that: 1) The tensile force is applied by a manual operation chain block, the precision is poor, 2) the two ends of the towing rope are rigidly connected, the negative influence of tangential stress on the test under the action of the tensile force and vibration is not considered, 2) only one towing rope can be detected at a time, the two ends of the towing rope are rigidly connected, the disassembly and the assembly are troublesome, the detection efficiency is low, and 4) the test is carried out in a still water environment and does not accord with the actual working condition of the towing rope. Disclosure of Invention The first object of the invention is to provide a device capable of effectively and accurately testing the vibration performance of the underwater towing rope, and the second object of the invention is to provide a method for testing the vibration performance of the underwater towing rope by using the device. The invention adopts the technical scheme that the device for testing the vibration performance of the underwater towing rope comprises a water tank, an output end sensor mounting plate, an input end sensor mounting plate, a vibration exciter and a split towing rope connector with rotation and sealing functions, wherein a water tank outlet and a water tank inlet are respectively arranged at two ends of the water tank, an annular water distribution pipeline and a water pump are arranged between the water tank outlet and the water tank inlet, and the water pump is used for adjusting the water flow speed in the water tank; The top of the pool is provided with a trailer which can move along the length direction and has a position locking function, one end of the towing rope is connected with an output end sensor mounting plate through a towing rope connector and a first pull ring, and the other end of the towing rope is connected with an input end sensor mounting plate through a towing rope connector and a second pull ring; the winch with a plurality of independently controlled wire rope winding shafts is arranged on the trailer, and the wire ropes are wound on the wire rope winding shafts, and each wire rope winding shaft corresponds to one towing rope to be tested; A bracket is fixed on the trailer, and pulleys are arranged at the upper end and the lower end of the bracket corresponding to the position of each towing rope and used for changing the direction of the steel wire rope to keep the steel wire rope horizontal in water; one end of the steel wire rope is connected with the steel wire rope winding shaft, the other end of the steel wire rope is connected with the first pull ring, the vibration exciter is fixed on the vibration exciter fixing steel frame, the vibration exciter fixing steel frame is arranged on the top of the water tank in a crossing mode and is fixed on the sensor mounting plate of the input end, the steel wire rope fixing steel frame of the input end is fixed on the outer side of the vibration exciter fixing steel frame, the pulleys with the same height are arranged at the positions, corresponding to each towing rope to be detected, of the lower end of the steel wire rope fixing steel frame, the pulleys are equal in height, steel wire rope fixing seats with fastening bolts are arranged at the positions, corresponding to the pulleys, of the top of the steel wire rope fixing steel frame of the input end, and the steel wire rope connected with the second pull ring penetrates through the pulleys on the steel wire rope fixing steel frame of the input end and is fixed on the steel wire rope fixing seat. Further, the edges of the two sides of the top of the pool are fixed with rails through pre-buried steel plates, and the trailer is arranged on the rails of the two sides. The input end sensor mounting plate is of a T shape and is provided with a vertica