Patrol ship vibration and noise reduction manufacturing method

Abstract

The invention discloses a patrol ship vibration and noise reduction manufacturing method. The method comprises the steps that technical indexes covering noise control, vibration control and material process suitability are determined; determining economic indexes covering the weight and speed balance of the ship body, the test cost and the cost performance of the effect; based on the technical indexes and the economic indexes, ship structure optimization, turbine equipment vibration and noise reduction treatment and built-in material vibration and noise reduction optimization are carried out; establishing a whole ship statistical energy acoustic model to calculate and evaluate the noise level; performing targeted optimization on the exceeding area and the noise source according to an evaluation result until a limit value requirement is met; formulating and auditing a construction drawing; compiling a construction technical specification to guide on-site construction; and cabin vibration noise testing is carried out and a test report is compiled. According to the method, the vibration and noise reduction target can be systematically achieved, the work and life comfort of sailors is effectively guaranteed, later reworking is avoided, the construction period is shortened, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and more specifically, to a method for manufacturing a patrol boat with vibration reduction and noise reduction capabilities. Background Technology

[0002] As high-speed maritime law enforcement vessels, patrol boats have high requirements for technical condition, navigation safety, and comfort. Currently, high-horsepower patrol boats are equipped with four main engines with a total power of 12,400 kW and four spray pumps. They adopt a fore and aft engine room layout, with the fore engine room close to the living and working area. During patrols, the vibration and noise control in the living and working area is quite difficult, which greatly affects the comfort of the crew's work and life. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide a method for manufacturing a patrol boat with vibration reduction and noise reduction, so as to achieve the goal of vibration reduction and noise reduction and ensure the comfort of the crew's work and life.

[0004] The technical solution of this invention is: a method for manufacturing a patrol boat with vibration reduction and noise reduction capabilities, comprising the following steps: Step 1. Determine the technical specifications, which include: Noise control: Under conditions of full-load navigation and normal engine speed, the noise in each compartment and area must meet the set limits. Vibration control: Under full-load navigation and main engine operating conditions, the vibration of each compartment and area must meet the requirements of the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2 standard. The materials and processes used are compatible; the damping materials, insulation materials, and deck coverings have all been approved by authoritative bodies. Step 2. Determine economic indicators, including: The balance between hull weight and speed is achieved by optimizing the selection and installation of vibration and noise reduction materials to control the hull weight without significant increase and ensure that the ship's full-load speed reaches the design target. Consider the cost-effectiveness of testing, develop efficient testing plans, and keep project testing costs within budget. Step 3. Based on the determined technical and economic indicators, optimize the hull structure, reduce vibration and noise in the engine equipment, and optimize the vibration and noise reduction of the interior materials; Step 4. Establish a statistical energy acoustic model for the entire ship, calculate the noise in the main compartments of each deck under cruise and full-speed conditions, and evaluate whether the design optimization in Step 3 meets the noise limit requirements. Step 5. Based on the initial assessment results, take corresponding optimization measures and perform iterative calculations for the identified noise-exceeding areas and key noise sources until the noise in all cabins meets the limit requirements. Step 6. Prepare detailed construction drawings and review them to ensure that the design fully complies with the specifications and classification society requirements; Step 7. Based on the approved construction drawings, prepare a construction technical specification to guide on-site construction; Step 8. Compile a test outline for cabin vibration and noise. Then, during the construction phase or the ship trial and sea trial phase, conduct cabin vibration and noise tests according to the test outline, and finally compile a test report.

[0005] As a further improvement, the noise levels in each cabin and area must meet the following limits: engine room ≤110dB(A), control room ≤75dB(A), dining room ≤70dB(A), bridge ≤65dB(A), command center ≤65dB(A), senior crew quarters ≤60dB(A), other living quarters ≤65dB(A). The noise reduction effect of the main unit silencer and auxiliary unit silencer is no less than 25dB(A), and the noise index of the nacelle fan and pump meets the low noise product standard.

[0006] Furthermore, in vibration control, the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2 "Comprehensive Evaluation Standard for Vibration of Merchant Ships Less Than 100m in Length" are referenced to ensure that vibration in living and working areas is within a slight range, and vibration in machinery areas is within an acceptable range; the ship has no strong overall vibration or local vibration of the hull, and does not affect the normal operation of machinery and equipment or the comfort of personnel.

[0007] Furthermore, hull structure optimization requires strict adherence to the drawings approved by the classification society and the design department, controlling construction precision; strengthening the structure in the main engine base and generator set base installation areas, optimizing construction techniques, and avoiding vibration sources caused by improper construction; and adopting chamfered or rounded transition designs for structural abrupt changes and component transition areas, and welding according to the structural node drawing specifications.

[0008] Furthermore, the vibration reduction and noise reduction treatment of marine equipment first selects equipment with excellent vibration performance, adopts vibration reduction installation methods for generator sets, engine room fans and air compressors, and adds vibration dampers to the control boxes of important equipment.

[0009] Furthermore, silencers are installed on the main unit and auxiliary units to ensure that the noise reduction effect is not less than 25dB(A); the nacelle fan adopts a high-efficiency, low-noise model and is equipped with frequency conversion control, and the pump is selected as a low-noise product.

[0010] Furthermore, the optimization of interior materials for vibration reduction and noise reduction includes: Select ultra-lightweight deck base material, A60 floating fire-resistant deck material, anti-slip ceramic tiles, or PVC flooring according to the function of the cabin; lay floating flooring on the restaurant deck; and add a 1m wide rubber mat to the control console area of ​​the bridge or central control room. Based on cabin noise requirements, lightweight A60 fireproof insulation or lightweight heat and sound insulation of a specified thickness is used to cover the cabin walls and ceiling area. Apply QY-DP1 single-component water-based damping coating to the decks, bulkheads, and equipment bases of the engine room, pump room, and living quarters; apply a damping of not less than 8mm to the deck of the command center, a damping of not less than 12mm to the deck of the central control room, and a damping of not less than 8mm to the base of the main engine and the base of the diesel generator set. The interior wall panels are made of composite rock wool or aluminum honeycomb panels. In designated areas, high sound insulation composite rock wool sound-absorbing panels with perforated galvanized steel or aluminum sheet are used. The interior wall panels are installed using flexible connections. The top groove is connected with angle steel using flexible components, and the bottom groove is equipped with an insulating rubber sheet.

[0011] Furthermore, a statistical energy acoustic model of the entire ship was established using VA One software.

[0012] Furthermore, during the construction process, we strictly followed the drawings and the supplier's process requirements, first laying the damping material, then installing the insulation material, and finally installing the deck covering; we strengthened quality control in key areas such as the equipment base and the transition of the bulkhead.

[0013] Furthermore, porous sound-absorbing aluminum panels are installed in the ceilings and walls between the nacelle, air ducts, and fans.

[0014] Beneficial effects Compared with the prior art, the advantages of this invention are as follows: This invention first optimizes the hull structure, reduces vibration and noise in engine equipment, and optimizes interior materials based on technical and economic indicators. Then, it calculates the noise levels in the main cabins of each deck under cruising and full-speed conditions using a statistical energy acoustic model of the entire ship. For identified areas exceeding noise limits and key noise sources, corresponding optimization measures are taken until the noise meets the required limits. Finally, construction drawings and technical specifications are developed to guide on-site construction, achieving the vibration and noise reduction goals and ensuring the comfort of the crew. Applying this invention significantly reduces rework due to vibration or noise after the patrol vessel construction is completed, or even eliminates the need for rework altogether, achieving the vibration and noise reduction goals in one go, effectively shortening the construction period and reducing production costs. Attached Figure Description

[0015] Figure 1 This is a flowchart of the present invention; Figure 2 A schematic diagram illustrating the use of interior wall panels as cabin decoration materials; Figure 3 A schematic diagram illustrating the use of flexible connections for interior wall panels; Figure 4 A schematic diagram of the deck covering and flooring. Figure 5This is a schematic diagram of the installation of an A60 floating floor.

[0016] Among them: 1-Angle steel, 2-Top channel, 3-Steel wall, 4-Interior wall panel, 5-Bottom channel, 6-Deck, 7-Shim, 8-Deck covering, 9-Ceiling panel, 10-Independent enclosure, 11-Flexible component, 12-Insulating rubber sheet, 13-Composite rock wool board, 14-Kickboard, 15-Floor, 16-Sealant, 17-Steel mesh, 18-Ceramic wool partition strip, 19-Ceramic wool board, 20-Waterproof membrane. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0018] See Figures 1-5 A method for manufacturing a patrol boat with vibration reduction and noise reduction includes the following steps 1 to 8: Step 1. Determine the technical specifications, which include: 1) Noise control: Under full-load navigation and main engine operating speed conditions, the noise levels in each compartment and area must meet the set limits. Specifically, the noise levels in each compartment and area must meet the following set limits: Engine room ≤ 110 dB(A), Central control room ≤ 75 dB(A), Dining room ≤ 70 dB(A), Bridge room ≤ 65 dB(A), Command center ≤ 65 dB(A), Senior crew quarters ≤ 60 dB(A), Other living quarters ≤ 65 dB(A). The noise reduction effect of the main engine silencer and auxiliary engine silencer shall not be less than 25 dB(A), and the noise levels of the engine room fans and pumps shall meet the low-noise product standards.

[0019] 2) Vibration control: Under full-load navigation and main engine operating conditions, the vibration of each compartment and area must comply with the requirements of the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2. Specifically, referring to the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2 "Comprehensive Evaluation Standard for Vibration of Merchant Ships Less Than 100m in Length," ensure that the vibration in living and working areas is within a slight range, and the vibration in machinery spaces (fore and aft engine rooms, aft deck, and roof deck) is within an acceptable range; the ship should not experience strong overall vibration or local vibration of the hull (outer plating, decks, etc.), and should not affect the normal operation of machinery and equipment or the comfort of personnel.

[0020] 3) Material and process compatibility: The damping materials, insulation materials, and deck coverings used are all authoritatively approved. Specifically, the damping materials, insulation materials, and deck coverings are all approved by the classification society. For example, the PVC and rubber flooring surfaces have low flame propagation properties. The flexible connection process of the interior wall panels and the order of damping material installation (damping first, then insulation and coverings) comply with construction specifications, ensuring the stable effectiveness of vibration reduction and noise reduction measures.

[0021] Step 2. Determine economic indicators, including: 1) Balancing hull weight and speed: By optimizing the selection of vibration reduction and noise reduction materials (such as using QY-DP1 single-component water-based damping coating with a density that matches the hull load requirements) and the laying scheme (such as laying only in key areas to avoid large-area redundant coverage of the entire ship), the hull weight is controlled to prevent a significant increase, ensuring that the ship's full-load speed reaches the design target (≥31 knots) without any speed loss.

[0022] 2) Cost-effectiveness of testing: An efficient testing plan was developed, and the project testing costs were kept within the budget. The tests were mainly used for deck vibration testing and cabin noise testing. The final test results showed that at a speed of 31 knots, the vibration measurement values ​​were much lower than the reference limits, and the cabin noise measurement values ​​were all lower than the recommended values. The vibration reduction and noise reduction goals were achieved with reasonable testing investment, avoiding the increase in rework costs due to the failure of the measures. The cost-effectiveness was significant (the project testing cost was controlled within 200,000 yuan).

[0023] Step 3. Based on the determined technical and economic indicators, and taking into account the characteristics of the ship's high-horsepower main engine, waterjet propulsion, and fore and aft engine room layout, optimize the hull structure, reduce vibration and noise in the engine equipment, and optimize the vibration and noise reduction of the interior materials.

[0024] Step 4. Establish a statistical energy acoustic model of the entire ship. Simulate the hull model that has undergone hull structure optimization, engine equipment vibration and noise reduction treatment, and interior material vibration and noise reduction optimization through the acoustic model. Calculate the noise of the main compartments on each deck under cruising and full-speed conditions, and evaluate whether the design optimization in Step 3 meets the noise limit requirements.

[0025] In this embodiment, a statistical energy acoustic model of the entire ship is established using VA One software.

[0026] Step 5. Based on the initial assessment results, corresponding optimization measures are taken for the identified noise-exceeding areas and key noise sources, and iterative calculations are performed until the noise levels in all cabins meet the limit requirements. This significantly reduces the noise levels in each cabin, ensuring they all meet the noise index requirements, and effectively improves the overall comfort of the ship.

[0027] Step 6. Develop and review detailed construction drawings to ensure the design fully complies with regulations and classification society requirements. Specifically, refine the deck coverings, insulation materials, damping coatings, and woodwork treatments, creating detailed production design drawings (such as GJ4113-392-02 Deck Covering Layout Diagram, GJ4113-392-03 Shipwide Damping Material Laying Principle Diagram, etc.), clearly specifying material types, laying locations, thicknesses, and other parameters. The construction drawings require review and approval from the classification society to ensure the design meets regulatory requirements.

[0028] Step 7. Based on the approved construction drawings, prepare a construction technical specification to guide on-site construction. During construction, strictly follow the drawings and supplier's process requirements, first laying damping materials, then installing insulation materials, and finally installing deck coverings; strengthen quality control in key areas such as equipment bases and bulkhead transitions to ensure the effective implementation of vibration reduction and noise reduction measures.

[0029] Step 8. Develop a test outline for cabin vibration and noise. Subsequently, during the construction phase or the ship's sea trials, conduct cabin vibration and noise tests according to the test outline, and finally compile a test report. During the testing process, each step is tested and optimized to ensure that each test step achieves the vibration reduction and noise reduction goals.

[0030] Step 3 specifically includes: 1) Hull structure optimization: Hull structure optimization requires strict construction in accordance with the drawings approved by the classification society and the design department, and control of construction accuracy; strengthen the structural strength in the main engine base and generator set base installation areas, optimize the construction process, and avoid vibration sources caused by improper construction; adopt chamfer or rounded corner transition design for structural abrupt changes and component transition areas, and weld according to the structural node drawing specifications to ensure the reliability of structural connections and reduce vibration transmission.

[0031] 2) Vibration and noise reduction of marine equipment: The first step in vibration and noise reduction of marine equipment is to select equipment with excellent vibration performance. Vibration-reducing installation methods are adopted for generator sets, engine room fans and air compressors. Vibration dampers are added to the control boxes of important equipment to reduce vibration output from the source.

[0032] Silencers are installed on the main unit and auxiliary units to ensure that the noise reduction effect is not less than 25dB(A); the nacelle fan adopts a high-efficiency, low-noise model and is equipped with frequency conversion control, and the pump is selected as a low-noise product to reduce noise generation.

[0033] 3) Optimization of interior materials for vibration reduction and noise reduction includes: Deck materials: Select ultra-lightweight deck base material, A60 floating fire-resistant deck material, non-slip ceramic tiles, or PVC flooring according to the function of the cabin; lay floating flooring on the restaurant deck; add 1m wide rubber pads to the control console area of ​​the bridge or central control room to improve vibration reduction and sound insulation.

[0034] Insulation materials: Based on the cabin noise requirements, lightweight A60 fireproof insulation or lightweight heat and sound insulation insulation of a specified thickness (such as 30mm thick, (20+20)mm thick, 50mm thick, 75mm thick lightweight A60 fireproof insulation, etc.) are used to cover the cabin walls and ceiling area to block noise transmission.

[0035] Damping materials: QY-DP1 single-component water-based damping coating is applied to the decks, bulkheads, and equipment bases of the engine room, pump room, and living quarters; at least 8mm of damping is applied to the deck of the command center, at least 12mm of damping is applied to the deck of the central control room, and at least 8mm of damping is applied to the base of the main engine and the base of the diesel generator set. By increasing the damping energy of the plates, the transmission of structural sound is reduced.

[0036] Woodwork treatment: The interior wall panels use composite rock wool boards or aluminum honeycomb panels. In designated areas (areas close to vibration or noise sources), high sound insulation composite rock wool sound-absorbing boards with perforated galvanized steel or aluminum sheet cladding are selected. The interior wall panels are installed using flexible connections. The top groove is connected with angle steel using flexible components, and the bottom groove is equipped with an insulating rubber sheet.

[0037] Specifically, such as Figure 2 , Figure 3 As shown, the upper end of the steel wall 3 is provided with angle steel 1, and the bottom of the angle steel 1 is connected to the top groove 2 through a flexible component 11. The top surface of the deck 6 is covered with deck covering material 8. The deck 6 is provided with shims 7, and the top of the shims 7 is provided with a bottom groove 5. An insulating rubber plate 12 is added inside the bottom groove 5. The upper and lower ends of the inner wall panel 4 are inserted into the top groove 2 and the bottom groove 5, respectively. The top of the inner wall panel 4 is provided with a ceiling panel 9 (ceiling). The material of the ceiling panel 9 is the same as that of the inner wall panel 4, and composite rock wool board and aluminum honeycomb board can be selected. When the distance between the two steel walls 3 is too large (>10m), an independent enclosure wall 10 can be set between the two steel walls 3. Similar to the installation method of the inner wall panel 4, the bottom surface of the upper deck 6 is provided with angle steel 1, and the bottom of the angle steel 1 is connected to the top groove 2 through a flexible component 11. The upper and lower ends of the independent enclosure wall 10 are inserted into the top groove 2 and the bottom groove 5 on the deck 6, respectively. By employing a flexible connection method and adding an insulating rubber sheet inside the bottom groove, noise caused by structural vibration can be eliminated to the greatest extent, and resonance can be avoided. The flexible component 11 adopts a mature product from existing technology.

[0038] Figure 4 This diagram illustrates the floor covering with decking material and flooring. Decking material 8 is first laid on the top surface of deck 6, followed by flooring 15 (wooden or ceramic) on top of decking material 8. A skirting board 14, made of sound-insulating material, is installed between the interior wall panel 4 and flooring 15. This reduces structurally transmitted vibrations and noise, as well as noise generated by personnel activities.

[0039] Figure 5This diagram illustrates the installation of the A60 floating floor. Ceramic wool separator strips 18 are installed on the lower side of the steel wall 3. Ceramic wool boards 19 are installed on the top surface of the deck 6. A waterproof membrane 20 is then installed on the top surface of the ceramic wool boards 19, followed by deck covering 8. The deck covering 8 is made of lightweight fire-resistant deck covering and contains a steel mesh 17 to improve its strength. Finally, sealant 16 is applied to the ceramic wool separator strips 18, flush with the deck covering 8. The sound insulation can reach 50 dB.

[0040] In addition, porous sound-absorbing aluminum panels can be installed in the ceilings and walls of the cabin, air ducts and fan rooms to reduce air noise at the source by utilizing the Helmholtz resonance effect of the sound-absorbing structure of the aluminum panels.

[0041] The doors leading from the cabin to other compartments or passageways are made of high-insulation material, which can effectively block airborne noise from spreading to other compartments.

[0042] For example, the initial assessment results showed that the noise levels in the command center (65.2 dB(A), dining hall (74.7 dB(A), and central control room (77.1 dB(A))) all exceeded the limits; while the noise levels in the A08 engine room (64.4 dB(A)) and the A09 second turbine room (62.5 dB(A)) were close to the limits. The main noise sources were the air noise and structural noise from the main propulsion diesel engine.

[0043] Optimization measures: For compartments that exceed or are close to exceeding the standards, adjustments will be made to the thickness of the damping material, the type of deck covering will be changed, and sound-absorbing insulation layers will be added. Specific optimization measures are shown in Table 1 below:

[0044] Table 1 Optimization results: After optimization, the noise levels in each cabin were significantly reduced and all met the noise index requirements, effectively improving the overall comfort of the ship.

[0045] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for manufacturing a patrol boat to reduce vibration and noise, characterized in that, Includes the following steps: Step 1. Determine the technical specifications, which include: Noise control: Under conditions of full-load navigation and normal engine speed, the noise in each compartment and area must meet the set limits. Vibration control: Under full-load navigation and main engine operating conditions, the vibration of each compartment and area must meet the requirements of the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2 standard. The materials and processes used are compatible; the damping materials, insulation materials, and deck coverings have all been approved by authoritative bodies. Step 2. Determine economic indicators, including: The balance between hull weight and speed is achieved by optimizing the selection and installation of vibration and noise reduction materials to control the hull weight without significant increase and ensure that the ship's full-load speed reaches the design target. Consider the cost-effectiveness of testing, develop efficient testing plans, and keep project testing costs within budget. Step 3. Based on the determined technical and economic indicators, optimize the hull structure, reduce vibration and noise in the engine equipment, and optimize the vibration and noise reduction of the interior materials; Step 4. Establish a statistical energy acoustic model for the entire ship, calculate the noise in the main compartments of each deck under cruise and full-speed conditions, and evaluate whether the design optimization in Step 3 meets the noise limit requirements. Step 5. Based on the initial assessment results, take corresponding optimization measures and perform iterative calculations for the identified noise-exceeding areas and key noise sources until the noise in all cabins meets the limit requirements. Step 6. Prepare detailed construction drawings and review them to ensure that the design fully complies with the specifications and classification society requirements. Step 7. Based on the approved construction drawings, prepare a construction technical specification to guide on-site construction; Step 8. Compile a test outline for cabin vibration and noise. Then, during the construction phase or the ship trial and sea trial phase, conduct cabin vibration and noise tests according to the test outline, and finally compile a test report.

2. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, Noise levels in all cabins and areas must meet the following limits: engine room ≤ 110 dB(A), control room ≤ 75 dB(A), dining room ≤ 70 dB(A), bridge ≤ 65 dB(A), command center ≤ 65 dB(A), senior crew quarters ≤ 60 dB(A), other living quarters ≤ 65 dB(A); The noise reduction effect of the main unit silencer and auxiliary unit silencer is no less than 25dB(A), and the noise index of the nacelle fan and pump meets the low noise product standard.

3. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, In vibration control, refer to the China Classification Society's "Guidelines for Vibration Control on Ships" and GB / T 7452.2 "Comprehensive Evaluation Standard for Vibration of Merchant Ships with a Length of Less Than 100m" to ensure that the vibration in living and working areas is within a slight range and the vibration in machinery areas is within an acceptable range; the ship has no strong overall vibration or local vibration of the hull, and does not affect the normal operation of machinery and equipment or the comfort of personnel.

4. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, The optimization of the hull structure requires strict construction in accordance with the drawings approved by the design department and the classification society, and control of construction accuracy; strengthen the structural strength in the main engine base and generator set base installation areas, optimize the construction process, and avoid vibration sources caused by improper construction; adopt chamfer or rounded corner transition design for structural abrupt changes and component transition areas, and weld according to the structural node drawing specifications.

5. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, Vibration reduction and noise reduction treatment for marine equipment first selects equipment with excellent vibration performance, adopts vibration reduction installation methods for generator sets, engine room fans and air compressors, and adds vibration dampers to the control boxes of important equipment.

6. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 5, characterized in that, Silencers are installed on the main unit and auxiliary units to ensure that the noise reduction effect is not less than 25dB(A); the nacelle fan adopts a high-efficiency, low-noise model and is equipped with frequency conversion control, and the pump is a low-noise product.

7. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, Interior material vibration reduction and noise reduction optimization includes: Select ultra-lightweight deck base material, A60 floating fire-resistant deck material, anti-slip ceramic tiles, or PVC flooring according to the function of the cabin; lay floating flooring on the restaurant deck; and add a 1m wide rubber mat to the control console area of ​​the bridge or central control room. Based on cabin noise requirements, lightweight A60 fireproof insulation or lightweight heat and sound insulation of a specified thickness is used to cover the cabin walls and ceiling area. Apply QY-DP1 single-component water-based damping coating to the decks, bulkheads, and equipment bases of the engine room, pump room, and living quarters; apply a damping of not less than 8mm to the deck of the command center, a damping of not less than 12mm to the deck of the central control room, and a damping of not less than 8mm to the base of the main engine and the base of the diesel generator set. The interior wall panels are made of composite rock wool or aluminum honeycomb panels. In designated areas, high sound insulation composite rock wool sound-absorbing panels with perforated galvanized steel or aluminum sheet are used. The interior wall panels are installed using flexible connections. The top groove is connected with angle steel using flexible components, and the bottom groove is equipped with an insulating rubber sheet.

8. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, A statistical energy acoustic model of the entire ship was established using VA One software.

9. The method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, During construction, we strictly followed the drawings and the supplier's process requirements, first laying damping materials, then installing insulation materials, and finally installing deck coverings; we strengthened quality control in key areas such as equipment bases and bulkhead transitions.

10. A method for manufacturing a patrol boat with vibration reduction and noise reduction according to claim 1, characterized in that, Perforated sound-absorbing aluminum panels are installed on the ceilings and walls of the nacelle, air ducts, and fan rooms.

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