Hydrophone suspension system and deployment method for underwater radiated noise measurement of ships

Abstract

The invention relates to a hydrophone suspension system and deployment method for underwater radiation noise measurement of ships, including an equipment accommodation mechanism, a vibration reduction mechanism, and a measurement mechanism. The equipment accommodation mechanism includes a main buoy, an equipment installation top box, and a main buoy press The load-bearing block, the main connecting rod is pierced in the center of the main buoy, the top of the main connecting rod is connected with the equipment installation top box, and the bottom end is connected with the ballast block of the main buoy through the main rope; The center of the vibration-damping buoy is equipped with a vibration-damping connecting rod, and its top is connected to the main rope through an elastic rope; the measuring mechanism includes a hydrophone, a bracket and a floating ball, the hydrophone is connected to the bracket, the top of the bracket is connected to the floating ball, and the bracket The elastic rope is connected with the vibration-damping rope, and the hydrophone is connected with the equipment installation set-top box through the cable. The invention is easy to deploy, has strong anti-interference ability and accurate measurement.

Description

technical field [0001] The invention belongs to the technical field of ship underwater radiation testing, in particular to a hydrophone suspension system and deployment method for ship underwater radiation noise measurement. Background technique [0002] The hydrophone suspension system is used for the installation of hydrophones for underwater radiated noise measurement of ships, to isolate the interference caused by the environmental vibration and noise of ocean wind and waves to the measurement hydrophones, and to ensure the correctness of test data. [0003] With the launch of China Classification Society (CCS) ship underwater radiated noise measurement certification and classification work, the underwater radiated noise test of civilian ships is becoming more and more extensive. The measurement suspension system used in CCS "Guidelines for Underwater Radiated Noise of Ships" and related national military standards is currently the most commonly used, as shown in figure...

AI Technical Summary

Problems solved by technology

[0006] The signal cable of the hydrophone suspended at the end of the system is finally connected to the measurement ship through the floating cable. The floating cable fluctuates under the action of wind and waves on the sea surface, which interferes with the measurement hydrophone; , there is relative motion and force, and the system cable and traction rope are prone to vibration under the impact of water flow

These vibrations will be transmitted to the measuring hydrophone, causing the measurement results to contain hydroacoustic signals that do not belong to the characteristics of the ship under test, and even lead to distortion of the test results in severe cases;

[0007] 2) The system is complex and difficult to deploy at sea

[0008] The wind and wave interference introduced by floating cables can be eliminated by measures such as floating balls and uneven cable laying, but the technical requirements are high, and the length of floating cables is long, resulting in complex systems and difficulties in offshore deployment;

[0009] 3) The suspension system has high requirements on the distance measuring system and complicated installation

In order to measure the distance accurately, the suspension system needs to use the underwater ranging system when carrying out the underwater acoustic measurement of the surface ship, which has high requirements for the ranging system; at the same time, the measured ship needs to be docked separately before and after the measurement to carry out the installation and installation of the ranging system. Disassembly work, increased workload

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