A cabin structure vibration and air noise prediction verification test device

Abstract

The present invention discloses a cabin structure vibration and air noise prediction verification test device, comprising a frame structure, a structure support device, a structure mounting base, a frequency conversion device, a vibration reduction element and a wall sound absorbing material; the frame structure is fixed to the ground through the structure mounting base, and a vibration reduction element is provided between the frame structure and the structure mounting base; a target cabin is reserved inside the frame structure; the frequency conversion device is fixed inside the frame structure through the vibration reduction element and is located outside the target cabin; the structure support device is fixed outside the frame structure, and the bottom of the structure support device is fixed to the ground; and the wall sound absorbing material is laid on the inner wall of the frame structure. The present invention can be used to verify the accuracy of the vibration noise prediction method and simulate the vibration noise level of the cabin environment.

Description

Technical Field

[0001] The invention relates to the technical field of ship cabin vibration and noise prediction, and in particular to a cabin structure vibration and air noise prediction verification test device. Background Art

[0002] During the ship design phase, it is necessary to make necessary predictions of vibration and noise for the ship cabin, which is very important for whether the final completed ship cabin can meet the requirements of vibration and noise indicators. There are many different methods for predicting vibration and noise, involving different frequencies and quite a lot of environmental factors. In order to ensure the reliability of vibration and noise prediction, it is necessary to verify its results. Therefore, it is necessary to provide a cabin structure vibration and air noise prediction verification test device. Summary of the invention

[0003] In view of this, the present invention provides a cabin structure vibration and air noise prediction verification test device, which can be used to verify the accuracy of the vibration and noise prediction method and simulate the vibration and noise level of the cabin environment.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A cabin structure vibration and air noise prediction verification test device, comprising a frame structure, a structure support device, a structure installation base, a frequency conversion device, a vibration reduction element and a wall sound absorbing material;

[0006] The frame structure is fixed to the ground through a structural mounting base, and a vibration-damping element is provided between the frame structure and the structural mounting base; a target cabin is reserved inside the frame structure; the frequency conversion equipment is fixed inside the frame structure through the vibration-damping element and is located outside the target cabin; the structural support device is fixed outside the frame structure, and the bottom of the structural support device is fixed to the ground; and the wall sound-absorbing material is laid on the inner wall of the frame structure.

[0007] Furthermore, the frame structure is a two-layer structure.

[0008] Furthermore, the frequency conversion equipment includes a motor, a fan and a water pump;

[0009] The motor and the fan are fixed to the upper layer of the frame structure through vibration reduction elements, and the water pump is fixed to the lower layer of the frame structure through vibration reduction elements.

[0010] Furthermore, the structural mounting base is fixed to the ground by anchor bolts.

[0011] Furthermore, the structural support device is fixed to the external support of the frame structure by bolts, and the bottom is fixed to the ground by anchor bolts.

[0012] Furthermore, the vibration-damping element is a spring vibration damper.

[0013] Beneficial effects:

[0014] 1. The present invention has a compact structure and is easy to install and disassemble, which improves the convenience of workers in construction and maintenance. The present invention is equipped with a frequency conversion device, which generates a specified frequency vibration and air noise by frequency modulation of the frequency conversion device, thereby realizing the simulation of the vibration and noise level of the cabin environment. The wall sound-absorbing material laid on the inner wall of the frame structure simulates the wall vibration and noise transfer characteristics of the actual ship cabin, and the wall sound-absorbing material can be selected from materials with similar transfer characteristics according to needs. The vibration acceleration level and the air noise sound pressure level at the predicted position are measured and compared with the predicted values ​​to verify the vibration and noise prediction.

[0015] 2. The frame structure of the present invention can simulate different cabin structures as required, and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a two-dimensional plan view of the present invention;

[0017] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0018] Among them, 1-frame structure, 2-structural supporting device, 3-motor, 4-fan, 5-water pump, 6-structural mounting base, 7-wall sound absorbing material, 8-vibration reduction element. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] The present invention provides a cabin structure vibration and air noise prediction verification test device, such as Figure 1 , Figure 2 As shown, it includes a frame structure 1, a structural support device 2, a structural mounting base 6, a frequency conversion device, a vibration reduction element 8 and a wall sound absorbing material 7. The frequency conversion device includes a motor 3, a fan 4 and a water pump 5.

[0021] The frame structure 1 is a two-layer structure. A staircase for operators to enter the upper layer is arranged outside the frame structure 1.

[0022] The frame structure 1 is fixed to the ground through a structural mounting base 6, and a vibration reduction element 8 is provided between the frame structure 1 and the structural mounting base 6; the structural mounting base 6 is fixed to the ground through anchor bolts. A target cabin is reserved inside the frame structure 1; the motor 3 and the fan 4 are fixed to the upper layer of the frame structure 1 through the vibration reduction element 8, and the water pump 5 is fixed to the lower layer of the frame structure 1 through the vibration reduction element 8, and they are all located outside the target cabin. The motor 3, the fan 4 and the water pump 5 can also be directly rigidly installed. The structural support device 2 is fixed to the external pillar of the frame structure 1 by bolts, and the bottom is fixed to the ground by anchor bolts. When the frame structure 1 is not tilted, the support device may not be in contact with the bolts. The wall sound absorbing material 7 is laid on the inner wall of the frame structure 1.

[0023] The vibration-damping element 8 is a spring damper.

[0024] When the test device is working, the motor 3, fan 4 and water pump 5 therein operate at a specified frequency through a variable frequency power supply, and sound-absorbing materials are laid on the walls and ceiling of the frame structure 1, which can simulate the wall vibration noise transfer characteristics of a real ship cabin, measure the vibration acceleration level and air noise sound pressure level at the predicted position, compare them with the predicted values, and verify the vibration noise prediction.

[0025] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cabin structure vibration and air noise prediction verification test device, characterized in that: It includes frame structure, structural support device, structural installation base, frequency conversion equipment, vibration reduction elements and wall sound absorbing materials; The frame structure is a two-layer structure, the frame structure is fixed to the ground through a structure mounting base, and a vibration reduction element is provided between the frame structure and the structure mounting base; the structure mounting base is fixed to the ground through anchor bolts; a target cabin is reserved inside the frame structure; The frequency conversion equipment is fixed inside the frame structure through the vibration reduction element and is located outside the target cabin; the structural support device is fixed outside the frame structure, and the bottom of the structural support device is fixed to the ground; the wall sound absorbing material is laid on the inner wall of the frame structure; The frequency conversion equipment includes a motor, a fan and a water pump; the motor and the fan are fixed to the upper layer of the frame structure through vibration reduction elements, and the water pump is fixed to the lower layer of the frame structure through vibration reduction elements.

2. The cabin structure vibration and air noise prediction verification test device according to claim 1, characterized in that: The structural support device is fixed to the external support of the frame structure by bolts, and the bottom is fixed to the ground by anchor bolts.

3. The cabin structure vibration and air noise prediction verification test device according to claim 1, characterized in that: The vibration-damping element is a spring vibration damper.

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