WO2023098559A1 - Method for assessing underwater radiation noise caused by device under real ship installation conditions - Google Patents
Method for assessing underwater radiation noise caused by device under real ship installation conditions Download PDFInfo
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- WO2023098559A1 WO2023098559A1 PCT/CN2022/134026 CN2022134026W WO2023098559A1 WO 2023098559 A1 WO2023098559 A1 WO 2023098559A1 CN 2022134026 W CN2022134026 W CN 2022134026W WO 2023098559 A1 WO2023098559 A1 WO 2023098559A1
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- the invention relates to the technical field of ships, in particular to an evaluation method for underwater radiation noise caused by equipment installed on a real ship.
- Underwater radiated noise is an important design index at each design stage of a ship.
- underwater radiated noise has a potential negative impact on the marine environment and marine life.
- the International Maritime Organization and major classification societies of various countries have The limit value of underwater radiated noise of ships puts forward specific limit value requirements.
- the level of underwater radiation noise directly determines the acoustic stealth capability of the ship detected by sonar and its battlefield survivability. Therefore, underwater radiated noise is one of the important components of the ship's comprehensive performance index.
- the general traditional method is to conduct combined modeling of equipment-vibration isolation system-hull structure-water area, and then apply The vibration response of the machine feet measured by the laboratory test when the equipment leaves the factory is used to analyze and calculate the underwater radiation noise caused by equipment excitation.
- This traditional method There are two deficiencies in this traditional method: First, the vibration level of the equipment feet measured in the laboratory installation environment when the marine machinery equipment leaves the factory cannot truly reflect the actual ship due to the difference between the laboratory environment and the installation conditions of the actual ship. Second, combined modeling analysis involves the entire equipment vibration isolation system, structural system and external flow field, the calculation and analysis cycle will be lengthened, and the required underwater noise level indicators cannot be quickly analyzed and obtained.
- the present inventor proposes a method for evaluating the underwater radiation noise caused by equipment installed on a real ship.
- the technical solution of the present invention is as follows:
- a method for evaluating underwater radiated noise caused by equipment installed on a real ship comprising:
- the underwater radiated noise caused by the marine machinery equipment operating under the real ship installation condition is calculated.
- the vibration test data of the marine mechanical equipment operating under laboratory conditions at least include: the vibration acceleration a b of the machine feet when the marine mechanical equipment operates under laboratory conditions and the vibration acceleration a b of the marine mechanical equipment under laboratory conditions
- the installation parameters include the mechanical admittance Y m of the installation feet of the marine mechanical equipment, the parameters of the laboratory vibration isolation system used when the marine mechanical equipment is installed under laboratory conditions, and the parameters of the laboratory installation foundation used.
- the parameters of the laboratory vibration isolation system include the number N b of laboratory vibration isolators in the laboratory vibration isolation system and the mechanical admittance of each laboratory vibration isolator, and the parameters of the laboratory installation foundation Including the mechanical admittance Y bf of the laboratory installed base.
- the installation parameters of marine mechanical equipment under the actual ship installation conditions include the mechanical admittance Y m of the installation machine feet of the marine mechanical equipment, the actual ship separation of the marine mechanical equipment when installed under the actual ship installation conditions The parameters of the vibration system and the parameters of the actual ship installation basis adopted.
- the parameters of the real ship vibration isolation system include the number N e of the real ship vibration isolators of the real ship vibration isolation system and the mechanical admittance of each real ship vibration isolator, and the parameters of the real ship installation basis include the actual The mechanical admittance Y f of the ship's installed foundation.
- This application discloses a method for evaluating underwater radiated noise caused by equipment installed on a real ship. Conversion, without combined modeling, based on the data of marine machinery and equipment in the laboratory and real ship installation conditions, the underwater radiated noise caused by marine machinery and equipment under the conditions of real ship installation can be quickly evaluated, and it overcomes the traditional method due to the direct The calculation error introduced by using the laboratory vibration data of marine mechanical equipment improves the calculation efficiency of underwater radiated noise under the actual ship installation conditions of marine mechanical equipment, and saves calculation and evaluation time.
- Fig. 1 is a schematic flowchart of the evaluation method of underwater radiated noise disclosed in the present application.
- Figure 2 is a schematic diagram of the installation of marine machinery and equipment under laboratory conditions in an example.
- This application discloses a method for evaluating underwater radiated noise caused by equipment installed on a real ship. Please refer to the flow chart shown in Figure 1. The method includes the following steps:
- the vibration test data here mainly includes two types: marine machinery and equipment operating under laboratory conditions The foot vibration acceleration a b and the installation parameters of marine mechanical equipment under laboratory conditions.
- the foot vibration acceleration a b and the installation parameters of marine mechanical equipment under laboratory conditions.
- the installation parameters of marine mechanical equipment under laboratory conditions include: the mechanical admittance Y m of the installation feet of marine mechanical equipment, the parameters of the laboratory vibration isolation system used when marine mechanical equipment is installed under laboratory conditions, and the adopted Parameters for laboratory installations.
- the parameters of the laboratory vibration isolation system include the number N b of laboratory vibration isolators in the laboratory vibration isolation system and the mechanical admittance Y' 11 , Y' 22 , Y' 21 , Y' of each laboratory vibration isolator 22.
- the parameters of the laboratory installation foundation include the mechanical admittance Y bf of the laboratory installation foundation.
- the unconstrained vibration acceleration a 0 of marine mechanical equipment is determined as:
- the installation structure of marine mechanical equipment under the installation conditions of the real ship is the same as that under the laboratory conditions: the installation feet of the marine mechanical equipment are installed on the installation foundation of the real ship through the vibration isolation system of the real ship.
- the installation parameters under the installation conditions include: the mechanical admittance Y m of the installation feet of the marine mechanical equipment, the parameters of the real ship vibration isolation system used when the marine mechanical equipment is installed under the real ship installation conditions, and the parameters of the real ship installation foundation. parameter.
- the parameters of the real ship vibration isolation system include the number N e of the real ship vibration isolators of the real ship vibration isolation system and the mechanical admittances Y 11 , Y 12 , Y 21 , Y 22 of each real ship vibration isolator, the installation basis of the real ship
- the parameters of include the mechanical admittance Y f of the actual ship's installed foundation.
- the acoustic transfer function T from the installation foundation of the real ship to the underwater radiated noise represents the underwater radiated noise sound source level of the hull when the vibration acceleration at the installation foundation of the real ship is unit value, and the acoustic transfer function T has passed the vibration and noise test of the real ship obtained or obtained through numerical analysis.
- the variables involved in the above methods are all in the International System of Units.
- this application takes the SI data at a single fixed frequency point of 100 Hz as an example to describe in detail the calculation process of underwater radiated noise caused by certain marine machinery and equipment installed on a real ship.
- the schematic diagram of the installation of the vibration test of the marine mechanical equipment 1 under laboratory conditions is shown in Figure 2.
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Abstract
The present invention relates to the technical field of ships. Disclosed is a method for assessing underwater radiation noise caused by a device under real ship installation conditions. The method comprises: determining an unconstrained vibration acceleration of a marine mechanical device on the basis of vibration test data of the marine mechanical device when the marine mechanical device operates under laboratory conditions; determining, on the basis of an installation parameter of the marine mechanical device under real ship installation conditions, a vibration acceleration of a real ship installation foundation that is caused when the marine mechanical device operates under the real ship installation conditions; and calculating underwater radiation noise on the basis of a sound transfer function. According to the method, vibration excitation conversion under real ship installation conditions is performed on vibration test data of a marine mechanical device under laboratory conditions when the marine mechanical device leaves a factory, combined modeling is not required, and a calculation error that is introduced by the direct use of laboratory vibration data of the marine mechanical device in a traditional method is overcome, thereby improving the efficiency of calculation of underwater radiation noise of the marine mechanical device under the real ship installation conditions, and saving the time required for calculation and assessment.
Description
本发明涉及船舶技术领域，尤其是一种设备在实船安装条件下引起的水下辐射噪声的评估方法。The invention relates to the technical field of ships, in particular to an evaluation method for underwater radiation noise caused by equipment installed on a real ship.
水下辐射噪声是船舶各设计阶段一项重要的设计指标，对民用船舶来说，水下辐射噪声对海洋环境和海洋生物有着潜在的负面影响，目前国际海事组织和各国主要船级社都对船舶水下辐射噪声的限值提出了具体限值要求。对于军用作战舰艇来说，水下辐射噪声水平的大小直接决定着船舶被声呐探测到的声隐身能力和其战场生存力。因此，水下辐射噪声是船舶综合性能指标的重要组成之一。Underwater radiated noise is an important design index at each design stage of a ship. For civil ships, underwater radiated noise has a potential negative impact on the marine environment and marine life. At present, the International Maritime Organization and major classification societies of various countries have The limit value of underwater radiated noise of ships puts forward specific limit value requirements. For military warships, the level of underwater radiation noise directly determines the acoustic stealth capability of the ship detected by sonar and its battlefield survivability. Therefore, underwater radiated noise is one of the important components of the ship's comprehensive performance index.
为了评估船用机械设备在实船安装条件下引起的水下辐射噪声大小，一般传统方法是对设备-隔振系统-船体结构-水域进行组合建模，然后在所建分析模型的设备位置处施加设备出厂时实验室试验所测得的机脚振动响应，以此分析计算设备激励而引起的水下辐射噪声。此传统方法存在着二项不足：一是，船用机械设备出厂时实验室安装环境下所测的设备机脚振动水平，由于实验室环境和实船安装条件的差异，并不能真实地反映实船条件的设备振动水平；二是组合建模分析由于涉及到整个设备隔振系统、结构系统和外流场，计算分析周期就会加长，无法快速地分析获取到所需要的水下噪声水平指标。In order to evaluate the magnitude of underwater radiated noise caused by marine mechanical equipment under the actual ship installation conditions, the general traditional method is to conduct combined modeling of equipment-vibration isolation system-hull structure-water area, and then apply The vibration response of the machine feet measured by the laboratory test when the equipment leaves the factory is used to analyze and calculate the underwater radiation noise caused by equipment excitation. There are two deficiencies in this traditional method: First, the vibration level of the equipment feet measured in the laboratory installation environment when the marine machinery equipment leaves the factory cannot truly reflect the actual ship due to the difference between the laboratory environment and the installation conditions of the actual ship. Second, combined modeling analysis involves the entire equipment vibration isolation system, structural system and external flow field, the calculation and analysis cycle will be lengthened, and the required underwater noise level indicators cannot be quickly analyzed and obtained.
发明内容Contents of the invention
本发明人针对上述问题及技术需求，提出了一种设备在实船安装条件下引起的水下辐射噪声的评估方法，本发明的技术方案如下：In view of the above-mentioned problems and technical requirements, the present inventor proposes a method for evaluating the underwater radiation noise caused by equipment installed on a real ship. The technical solution of the present invention is as follows:
一种设备在实船安装条件下引起的水下辐射噪声的评估方法，该方法包括：A method for evaluating underwater radiated noise caused by equipment installed on a real ship, the method comprising:
基于船用机械设备在实验室条件下运行的振动试验数据确定船用机械设备的无约束振动加速度a
0；
Determine the unconstrained vibration acceleration a 0 of the marine machinery and equipment based on the vibration test data of the marine machinery and equipment operating under laboratory conditions;
基于船用机械设备在实船安装条件下的安装参数以及无约束振动加速度a
0，确定船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度a
f；
Based on the installation parameters of the marine machinery and equipment under the installation conditions of the actual ship and the unconstrained vibration acceleration a 0 , determine the vibration acceleration a f of the installation foundation of the actual ship caused by the operation of the marine mechanical equipment under the installation conditions of the actual ship;
根据实船安装基础的振动加速度a
f，以及实船安装基础到水下辐射噪声的声传递函数计算得到船用机械设备在实船安装条件下运行时引起的水下辐射噪声。
According to the vibration acceleration a f of the real ship installation foundation and the acoustic transfer function from the real ship installation foundation to the underwater radiated noise, the underwater radiated noise caused by the marine machinery equipment operating under the real ship installation condition is calculated.
其进一步的技术方案为，船用机械设备在实验室条件下运行的振动试验数据至少包括：船用机械设备在实验室条件下运行时的机脚振动加速度a
b以及船用机械设备在实验室条件下的安装参数，安装参数包括船用机械设备的安装机脚的机械导纳Y
m、船用机械设备在实验室条件下安装时采用的实验室隔振系统的参数以及采用的实验室安装基础的参数。
Its further technical solution is that the vibration test data of the marine mechanical equipment operating under laboratory conditions at least include: the vibration acceleration a b of the machine feet when the marine mechanical equipment operates under laboratory conditions and the vibration acceleration a b of the marine mechanical equipment under laboratory conditions The installation parameters include the mechanical admittance Y m of the installation feet of the marine mechanical equipment, the parameters of the laboratory vibration isolation system used when the marine mechanical equipment is installed under laboratory conditions, and the parameters of the laboratory installation foundation used.
其进一步的技术方案为，实验室隔振系统的参数包括实验室隔振系统中的实验室隔振器的数量N
b以及每个实验室隔振器的机械导纳，实验室安装基础的参数包括实验室安装基础的机械导纳Y
bf。
Its further technical scheme is that the parameters of the laboratory vibration isolation system include the number N b of laboratory vibration isolators in the laboratory vibration isolation system and the mechanical admittance of each laboratory vibration isolator, and the parameters of the laboratory installation foundation Including the mechanical admittance Y bf of the laboratory installed base.
其进一步的技术方案为，船用机械设备的无约束振动加速度为：Its further technical solution is that the unconstrained vibration acceleration of marine mechanical equipment is:
其中，B
1＝(N
bY
bf+Y'
22)(N
bY
m+Y'
11)，B
2＝Y'
11(N
bY
bf+Y'
22)，B
3＝Y'
12Y'
21，Y'
11、Y'
12、Y'
21、Y'
22为实验室隔振系统中每个实验室隔振器的机械导纳。
Among them, B 1 =(N b Y bf +Y' 22 )(N b Y m +Y' 11 ), B 2 =Y' 11 (N b Y bf +Y' 22 ), B 3 =Y' 12 Y ' 21 , Y' 11 , Y' 12 , Y' 21 , Y' 22 are the mechanical admittance of each laboratory vibration isolator in the laboratory vibration isolation system.
其进一步的技术方案为，船用机械设备在实船安装条件下的安装参数包括船用机械设备的安装机脚的机械导纳Y
m、船用机械设备在实船安装条件下安装时采用的实船隔振系统的参数以及采用的实船安装基础的参数。
Its further technical solution is that the installation parameters of marine mechanical equipment under the actual ship installation conditions include the mechanical admittance Y m of the installation machine feet of the marine mechanical equipment, the actual ship separation of the marine mechanical equipment when installed under the actual ship installation conditions The parameters of the vibration system and the parameters of the actual ship installation basis adopted.
其进一步的技术方案为，实船隔振系统的参数包括实船隔振系统的实船隔振器的数量N
e以及各个实船隔振器的机械导纳，实船安装基础的参数包括实船安装基础的机械导纳Y
f。
Its further technical scheme is that the parameters of the real ship vibration isolation system include the number N e of the real ship vibration isolators of the real ship vibration isolation system and the mechanical admittance of each real ship vibration isolator, and the parameters of the real ship installation basis include the actual The mechanical admittance Y f of the ship's installed foundation.
其进一步的技术方案为，船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度为：Its further technical solution is that the vibration acceleration of the installation foundation of the actual ship caused by the marine machinery and equipment operating under the installation conditions of the actual ship is:
其中，E
1＝(N
eY
f+Y
22)(N
eY
m+Y
11)，E
2＝N
eY
fY
21，E
3＝Y
12Y
21，Y
11、Y
12、Y
21、Y
22为实船隔振系统中每个实船隔振器的机械导纳。
Among them, E 1 =(N e Y f +Y 22 )(N e Y m +Y 11 ), E 2 =N e Y f Y 21 , E 3 =Y 12 Y 21 , Y 11 , Y 12 , Y 21 , Y 22 is the mechanical admittance of each real ship vibration isolator in the real ship vibration isolation system.
其进一步的技术方案为，实船安装基础到水下辐射噪声的声传递函数通过实船振动噪声测试试验获得或者通过数值分析计算获得。Its further technical solution is that the acoustic transfer function from the installation foundation of the real ship to the underwater radiated noise is obtained through the vibration and noise test of the real ship or through numerical analysis and calculation.
其进一步的技术方案为，确定船用机械设备在实船安装条件下运行时引起的水下辐射噪声为P＝T×a
f，其中，T为声传递函数。
Its further technical solution is to determine the underwater radiated noise caused by the marine mechanical equipment operating under the actual ship installation condition as P=T×a f , where T is the sound transfer function.
本发明的有益技术效果是：The beneficial technical effect of the present invention is:
本申请公开了一种设备在实船安装条件下引起的水下辐射噪声的评估方法，该方法采用对船用机械设备出厂时在实验室条件下的振动试验数据进行实船安装条件下的振动激励换算，无需组合建模，根据船用机械设备在实验室和实船安装条件下的数据即可快速评估船用机械设备在实船安装条件下引起的水下辐射噪声，且克服了传统方法中由于直接使用船用机械设备的实验室振动数据而引入的计算误差，提高了船用机械设备的实船安装条件下的水下辐射噪声的计算效率，节省了计算评估时间。This application discloses a method for evaluating underwater radiated noise caused by equipment installed on a real ship. Conversion, without combined modeling, based on the data of marine machinery and equipment in the laboratory and real ship installation conditions, the underwater radiated noise caused by marine machinery and equipment under the conditions of real ship installation can be quickly evaluated, and it overcomes the traditional method due to the direct The calculation error introduced by using the laboratory vibration data of marine mechanical equipment improves the calculation efficiency of underwater radiated noise under the actual ship installation conditions of marine mechanical equipment, and saves calculation and evaluation time.
图1是本申请公开的水下辐射噪声的评估方法的流程示意图。Fig. 1 is a schematic flowchart of the evaluation method of underwater radiated noise disclosed in the present application.
图2是一个实例中船用机械设备在实验室条件下的安装示意图。Figure 2 is a schematic diagram of the installation of marine machinery and equipment under laboratory conditions in an example.
下面结合附图对本发明的具体实施方式做进一步说明。The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
本申请公开了一种设备在实船安装条件下引起的水下辐射噪声的评估方法，请参考图1所示的流程图，该方法包括如下步骤：This application discloses a method for evaluating underwater radiated noise caused by equipment installed on a real ship. Please refer to the flow chart shown in Figure 1. The method includes the following steps:
1、基于船用机械设备在实验室条件下运行的振动试验数据确定船用机械设备的无约束振动加速度a
0。
1. Determine the unconstrained vibration acceleration a 0 of the marine mechanical equipment based on the vibration test data of the marine mechanical equipment operating under laboratory conditions.
将船用机械设备在实验室条件下安装并在预定工况下运行测量船用机械设备在实验室条件下运行的振动试验数据，这里振动试验数据主要包括两类：船用机械设备在实验室条件下运行时的机脚振动加速度a
b以及船用机械设备在实验室条件下的安装参数。船用机械设备在实验室条件下安装时，船用机械设备的安装机脚通过实验室隔振系统安装在实验室安装基础上。则船用机械设备在实验室条件下的安装参数包括：船用机械设备的安装机脚的机械导纳Y
m、船用机械设备在实验室条件下安装时采用的实验室隔振系统的参数以及采用的实验室安装基础的参数。
Install marine machinery and equipment under laboratory conditions and operate under predetermined working conditions to measure the vibration test data of marine machinery and equipment operating under laboratory conditions. The vibration test data here mainly includes two types: marine machinery and equipment operating under laboratory conditions The foot vibration acceleration a b and the installation parameters of marine mechanical equipment under laboratory conditions. When the marine mechanical equipment is installed under laboratory conditions, the mounting machine feet of the marine mechanical equipment are installed on the laboratory installation foundation through the laboratory vibration isolation system. The installation parameters of marine mechanical equipment under laboratory conditions include: the mechanical admittance Y m of the installation feet of marine mechanical equipment, the parameters of the laboratory vibration isolation system used when marine mechanical equipment is installed under laboratory conditions, and the adopted Parameters for laboratory installations.
实验室隔振系统的参数包括实验室隔振系统中的实验室隔振器的数量N
b以及每个实验室隔振器的机械导纳Y'
11、Y'
22、Y'
21、Y'
22，实验室安装基础的参数包括实验室安装基础的机械导纳Y
bf。
The parameters of the laboratory vibration isolation system include the number N b of laboratory vibration isolators in the laboratory vibration isolation system and the mechanical admittance Y' 11 , Y' 22 , Y' 21 , Y' of each laboratory vibration isolator 22. The parameters of the laboratory installation foundation include the mechanical admittance Y bf of the laboratory installation foundation.
据此，确定船用机械设备的无约束振动加速度a
0为：
Accordingly, the unconstrained vibration acceleration a 0 of marine mechanical equipment is determined as:
其中，B
1＝(N
bY
bf+Y'
22)(N
bY
m+Y'
11)，B
2＝Y'
11(N
bY
bf+Y'
22)，B
3＝Y'
12Y'
21。
Among them, B 1 =(N b Y bf +Y' 22 )(N b Y m +Y' 11 ), B 2 =Y' 11 (N b Y bf +Y' 22 ), B 3 =Y' 12 Y '21 .
2、基于船用机械设备在实船安装条件下的安装参数以及无约束振动加速度a
0，确定船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度a
f。
2. Based on the installation parameters of the marine mechanical equipment under the actual ship installation conditions and the unconstrained vibration acceleration a 0 , determine the vibration acceleration a f of the actual ship installation foundation caused by the operation of the marine mechanical equipment under the actual ship installation conditions.
船用机械设备在实船安装条件下的安装结构与实验室条件下相同：船用机械设备的安装机脚通过实船隔振系统安装在实船安装基础上，则类似的，船用机械设备在实船安装条件下的安装参数包括：船用机械设备的安装机脚的机械导纳Y
m、船用机械设备在实船安装条件下安装时采用的实船隔振系统的参数以及采用的实船安装基础的参数。实船隔振系统的参数包括实船隔振系统的实船隔振器的数量N
e以及各个实船隔振器的机械导纳Y
11、Y
12、Y
21、Y
22，实船安装基础的参数包括实船安装基础的机械导纳Y
f。
The installation structure of marine mechanical equipment under the installation conditions of the real ship is the same as that under the laboratory conditions: the installation feet of the marine mechanical equipment are installed on the installation foundation of the real ship through the vibration isolation system of the real ship. The installation parameters under the installation conditions include: the mechanical admittance Y m of the installation feet of the marine mechanical equipment, the parameters of the real ship vibration isolation system used when the marine mechanical equipment is installed under the real ship installation conditions, and the parameters of the real ship installation foundation. parameter. The parameters of the real ship vibration isolation system include the number N e of the real ship vibration isolators of the real ship vibration isolation system and the mechanical admittances Y 11 , Y 12 , Y 21 , Y 22 of each real ship vibration isolator, the installation basis of the real ship The parameters of include the mechanical admittance Y f of the actual ship's installed foundation.
则可以确定船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度a
f为：
Then it can be determined that the vibration acceleration a f of the installation foundation of the actual ship caused by the operation of the marine mechanical equipment under the installation condition of the actual ship is:
其中，E
1＝(N
eY
f+Y
22)(N
eY
m+Y
11)，E
2＝N
eY
fY
21，E
3＝Y
12Y
21。
Wherein, E 1 =(N e Y f +Y 22 )(N e Y m +Y 11 ), E 2 =N e Y f Y 21 , E 3 =Y 12 Y 21 .
3、根据实船安装基础的振动加速度a
f，以及实船安装基础到水下辐射噪声的声传递函数T计算得到船用机械设备在实船安装条件下运行时引起的水下辐射噪声。
3. According to the vibration acceleration af of the actual ship installation foundation and the acoustic transfer function T from the actual ship installation foundation to the underwater radiation noise, the underwater radiated noise caused by the marine machinery and equipment operating under the actual ship installation conditions is calculated.
其中，实船安装基础到水下辐射噪声的声传递函数T表示实船安装基础处的振动加速度为单位值时的船体水下辐射噪声声源级，声传递函数T通过实船振动噪声测试试验获得或者通过数值分析计算获得。具体的，可以确定船用机械设备在实船安装条件下运行时引起的水下辐射噪声为P＝T×a
f。上述方法中涉及到的变量均为国际单位制。
Among them, the acoustic transfer function T from the installation foundation of the real ship to the underwater radiated noise represents the underwater radiated noise sound source level of the hull when the vibration acceleration at the installation foundation of the real ship is unit value, and the acoustic transfer function T has passed the vibration and noise test of the real ship obtained or obtained through numerical analysis. Specifically, it can be determined that the underwater radiated noise caused by the marine mechanical equipment operating under the installation condition of a real ship is P=T×a f . The variables involved in the above methods are all in the International System of Units.
经过本申请提供的方法，可以在无需建模的条件下，实现实验室振动试验数据与实船安装条件下的振动激励换算，实现水下辐射噪声的评估，为了更清楚的说明本申请的方法，本申请以单一固定频率点100赫兹处的国际单位制数据为例，详细说明某船用机械设备在实船安装条件下引起的水下辐射噪声的计 算过程。Through the method provided by this application, the conversion of laboratory vibration test data and the vibration excitation under the installation condition of the real ship can be realized without modeling, and the evaluation of underwater radiated noise can be realized. In order to explain the method of this application more clearly , this application takes the SI data at a single fixed frequency point of 100 Hz as an example to describe in detail the calculation process of underwater radiated noise caused by certain marine machinery and equipment installed on a real ship.
(1)获取船用机械设备出厂时实验室的振动试验数据。(1) Obtain the vibration test data of the laboratory when the marine machinery and equipment leave the factory.
船用机械设备1在实验室条件下的振动试验安装示意图如图2所示，船用机械设备出厂时实验室的振动试验数据包括：实验室条件下该船用机械设备1在预定工况运行时的机脚振动加速度a
b＝0.01，该船用机械设备1的安装机脚2的机械导纳Y
m＝0.001，该船用机械设备1采用的实验室隔振器3的机械导纳为Y'
11＝0.01、Y'
12＝0.001、Y'
21＝0.001、Y'
22＝0.02，该船用机械设备1安装的实验室隔振器3的数量N
b＝4，该船用机械设备1安装的实验室安装基础4的机械导纳Y
bf＝0.002。
The schematic diagram of the installation of the vibration test of the marine mechanical equipment 1 under laboratory conditions is shown in Figure 2. The vibration test data of the laboratory when the marine mechanical equipment leaves the factory includes: Foot vibration acceleration a b = 0.01, the mechanical admittance Y m of the installation foot 2 of the marine mechanical equipment 1 = 0.001, the mechanical admittance of the laboratory vibration isolator 3 used in the marine mechanical equipment 1 is Y' 11 = 0.01 , Y' 12 ＝0.001, Y' 21 ＝0.001, Y' 22 ＝0.02, the number N b of the laboratory vibration isolators 3 installed on the marine mechanical equipment 1 is 4, the laboratory installation basis installed on the marine mechanical equipment 1 The mechanical admittance of 4 Y bf =0.002.
(2)计算得到该船用机械设备的无约束振动加速度a
0为：
其中B
1＝(N
bY
bf+Y'
22)(N
bY
m+Y'
11)＝0.000392，B
2＝Y'
11(N
bY
bf+Y'
22)＝0.00028，B
3＝Y'
12Y'
21＝0.000001。
(2) The calculated unconstrained vibration acceleration a 0 of the marine mechanical equipment is: where B 1 =(N b Y bf +Y' 22 )(N b Y m +Y' 11 )=0.000392, B 2 =Y' 11 (N b Y bf +Y' 22 )=0.00028, B 3 =Y ' 12 Y' 21 =0.000001.
(3)获取船用机械设备在实船安装条件下的安装参数，安装机脚2的机械导纳与实验室条件下相同为Y
m＝0.001，不同的是，该船用机械设备1采用的实船隔振器的机械导纳为Y
11＝0.02、Y
12＝0.002、Y
21＝0.002、Y
22＝0.03，该船用机械设备1安装的实船隔振器的数量N
b＝4，该船用机械设备1安装的实船安装基础的机械导纳Y
f＝0.005。
(3) Obtain the installation parameters of the marine mechanical equipment under the actual ship installation conditions. The mechanical admittance of the installed machine foot 2 is the same as Y m = 0.001 under the laboratory conditions. The difference is that the actual ship mechanical equipment 1 used The mechanical admittance of the vibration isolator is Y 11 =0.02, Y 12 =0.002, Y 21 =0.002, Y 22 =0.03, the number of actual ship vibration isolators installed in the marine machinery equipment 1 is N b =4, the marine machinery The mechanical admittance Y f of the installation foundation of the actual ship where the equipment 1 is installed is 0.005.
(4)计算船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度a
f为
其中，E
3＝Y
12Y
21＝0.000004，E
2＝N
eY
fY
21＝0.00004，E
1＝(N
eY
f+Y
22)(N
eY
m+Y
11)＝0.0012。
(4) Calculate the vibration acceleration a f of the installation foundation of the actual ship caused by the operation of the marine machinery and equipment under the installation condition of the actual ship: Wherein, E 3 =Y 12 Y 21 =0.000004, E 2 =N e Y f Y 21 =0.00004, E 1 =(N e Y f +Y 22 )(N e Y m +Y 11 )=0.0012.
(5)通过数值分析技术获取声传递函数T＝6。(5) Obtain the acoustic transfer function T=6 by numerical analysis technique.
(6)计算得到船用机械设备在实船安装条件下运行时引起的水下辐射噪声为P＝T×a
f＝0.00351。
(6) Calculate and obtain the underwater radiated noise caused by marine mechanical equipment operating under the condition of real ship installation as P=T×a f =0.00351.
以上所述的仅是本申请的优选实施方式，本发明不限于以上实施例。可以理解，本领域技术人员在不脱离本发明的精神和构思的前提下直接导出或联想到的其他改进和变化，均应认为包含在本发明的保护范围之内。What is described above is only a preferred embodiment of the present application, and the present invention is not limited to the above examples. It can be understood that other improvements and changes directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.
Claims (9)
- 一种设备在实船安装条件下引起的水下辐射噪声的评估方法，其特征在于，所述方法包括：A method for evaluating underwater radiated noise caused by equipment installed on a real ship, characterized in that the method includes:基于船用机械设备在实验室条件下运行的振动试验数据确定所述船用机械设备的无约束振动加速度a 0； Determining the unconstrained vibration acceleration a0 of the marine mechanical equipment based on the vibration test data of the marine mechanical equipment operating under laboratory conditions;基于所述船用机械设备在实船安装条件下的安装参数以及所述无约束振动加速度a 0，确定所述船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度a f； Based on the installation parameters of the marine mechanical equipment under the actual ship installation conditions and the unconstrained vibration acceleration a 0 , determine the vibration acceleration a f of the actual ship installation foundation caused by the marine mechanical equipment operating under the actual ship installation conditions ;根据所述实船安装基础的振动加速度a f，以及所述实船安装基础到水下辐射噪声的声传递函数计算得到所述船用机械设备在实船安装条件下运行时引起的水下辐射噪声。 According to the vibration acceleration af of the real ship installation foundation, and the acoustic transfer function from the real ship installation foundation to the underwater radiated noise, the underwater radiated noise caused by the marine mechanical equipment operating under the real ship installation condition is calculated. .
- 根据权利要求1所述的方法，其特征在于，所述船用机械设备在实验室条件下运行的振动试验数据至少包括：所述船用机械设备在实验室条件下运行时的机脚振动加速度a b以及所述船用机械设备在实验室条件下的安装参数，所述安装参数包括所述船用机械设备的安装机脚的机械导纳Y m、所述船用机械设备在实验室条件下安装时采用的实验室隔振系统的参数以及采用的实验室安装基础的参数。 The method according to claim 1, characterized in that, the vibration test data of the marine mechanical equipment operating under laboratory conditions at least includes: vibration acceleration a b of the machine feet when the marine mechanical equipment is operating under laboratory conditions And the installation parameters of the marine mechanical equipment under laboratory conditions, the installation parameters include the mechanical admittance Y m of the installation feet of the marine mechanical equipment, the The parameters of the laboratory vibration isolation system and the parameters of the laboratory installation foundation used.
- 根据权利要求2所述的方法，其特征在于，所述实验室隔振系统的参数包括所述实验室隔振系统中的实验室隔振器的数量N b以及每个实验室隔振器的机械导纳，所述实验室安装基础的参数包括所述实验室安装基础的机械导纳Y bf。 The method according to claim 2, wherein the parameters of the laboratory vibration isolation system include the number N of laboratory vibration isolators in the laboratory vibration isolation system and the number N of each laboratory vibration isolator. Mechanical admittance, the parameters of the laboratory installation foundation include the mechanical admittance Y bf of the laboratory installation foundation.
- 根据权利要求3所述的方法，其特征在于，所述船用机械设备的无约束振动加速度为：The method according to claim 3, wherein the unconstrained vibration acceleration of the marine mechanical equipment is:
其中，B 1＝(N bY bf+Y′ 22)(N bY m+Y′ 11)，B 2＝Y′ 11(N bY bf+Y′ 22)，B 3＝Y′ 12Y′ 21，Y′ 11、Y′ 12、Y′ 21、Y′ 22为所述实验室隔振系统中每个实验室隔振器的机械导纳。 Among them, B 1 =(N b Y bf +Y′ 22 )(N b Y m +Y′ 11 ), B 2 =Y′ 11 (N b Y bf +Y′ 22 ), B 3 =Y′ 12 Y ' 21 , Y' 11 , Y' 12 , Y' 21 , and Y' 22 are the mechanical admittance of each laboratory vibration isolator in the laboratory vibration isolation system. - 根据权利要求1所述的方法，其特征在于，所述船用机械设备在实船安装条件下的安装参数包括所述船用机械设备的安装机脚的机械导纳Y m、所述船 用机械设备在实船安装条件下安装时采用的实船隔振系统的参数以及采用的实船安装基础的参数。 The method according to claim 1, characterized in that, the installation parameters of the marine mechanical equipment under the actual ship installation conditions include the mechanical admittance Y m of the installation machine feet of the marine mechanical equipment, the mechanical admittance Y m of the marine mechanical equipment in The parameters of the real ship vibration isolation system and the parameters of the real ship installation foundation used during installation under the real ship installation conditions.
- 根据权利要求5所述的方法，其特征在于，所述实船隔振系统的参数包括所述实船隔振系统的实船隔振器的数量N e以及各个实船隔振器的机械导纳，所述实船安装基础的参数包括所述实船安装基础的机械导纳Y f。 The method according to claim 5, wherein the parameters of the real ship vibration isolation system include the number Ne of the real ship vibration isolators of the real ship vibration isolation system and the mechanical guidance of each real ship vibration isolator. Admittance, the parameters of the actual ship installation foundation include the mechanical admittance Y f of the actual ship installation foundation.
- 根据权利要求6所述的方法，其特征在于，所述船用机械设备在实船安装条件下运行时引起的实船安装基础的振动加速度为：The method according to claim 6, characterized in that, the vibration acceleration of the installation foundation of the actual ship caused when the marine mechanical equipment operates under the installation condition of the actual ship is:
其中，E 1＝(N eY f+Y 22)(N eY m+Y 11)，E 2＝N eY fY 21，E 3＝Y 12Y 21，Y 11、Y 12、Y 21、Y 22为所述实船隔振系统中每个实船隔振器的机械导纳。 Among them, E 1 =(N e Y f +Y 22 )(N e Y m +Y 11 ), E 2 =N e Y f Y 21 , E 3 =Y 12 Y 21 , Y 11 , Y 12 , Y 21 , Y 22 is the mechanical admittance of each real ship vibration isolator in the real ship vibration isolation system. - 根据权利要求1所述的方法，其特征在于，所述实船安装基础到水下辐射噪声的声传递函数通过实船振动噪声测试试验获得或者通过数值分析计算获得。The method according to claim 1, characterized in that the acoustic transfer function from the installation foundation of the real ship to the underwater radiated noise is obtained through a real ship vibration and noise test test or through numerical analysis and calculation.
- 根据权利要求1所述的方法，其特征在于，确定所述船用机械设备在实船安装条件下运行时引起的水下辐射噪声为P＝T×a f，其中，T为所述声传递函数。 The method according to claim 1, characterized in that the underwater radiated noise caused by the marine mechanical equipment operating under the actual ship installation condition is determined to be P=T×a f , where T is the acoustic transfer function .
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