JP2002318154A - Vibration and noise analysis system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibration and noise at operation of various kinds of devices smaller than a reference value and reduce time and cost by rapidly performing vibration and noise analysis. SOLUTION: This vibration and noise analysis system is equipped with a vibration and noise analysis software based on a statistical energy analysis method; and a control table containing a database storing knowledge such as analysis know-how, a trouble case of an analysis target and a measure for it, an index for database search, and an index wherein determination of the analysis result is quantified. The vibration and noise analysis system can be used by Internet and can rapidly and easily perform vibration and noise analysis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration / noise analysis system provided with a database storing knowledge, criteria, and analysis experience suitable for calculating vibration / noise.

[0002]

2. Description of the Related Art The vibration / noise analysis control system disclosed in Japanese Patent Publication No. 2000-81744 inversely analyzes the power of a vibration / noise source from vibration / noise measurement values based on a statistical energy analysis method and evaluates the power using the inverse analysis. The vibration or noise at the point is calculated and compared with an allowable value to change the operation state.

[0003]

SUMMARY OF THE INVENTION During the operation of various devices,
Vibration and noise of equipment and structures are large and may cause environmental problems. Vibration / noise analysis software based on the conventional statistical energy analysis method does not store management information that pairs analysis conditions and analysis result judgment results, and refers to when analysis conditions and targets change. In such a case, it was troublesome or there was a risk of making a mistake. In addition, it was necessary to refer to the analysis know-how, the trouble cases of the analysis object, and the knowledge such as countermeasures separately. The comparison between the vibration and noise tolerance and the analysis results also needed to be arranged on different routes. In addition, vibration
If you did not have noise analysis software, you could not analyze quickly and easily. The present invention has been made to solve at least one of the above problems.

[0004]

[Means for Solving the Problems] In order to solve the above problems, vibration and noise analysis software based on a statistical energy analysis method, a database and a database storing analysis know-how, knowledge of trouble cases and countermeasures of an analysis object, and the like. Build a vibration / noise analysis system with a management table that also includes search indexes and indexes that quantify the determination of analysis results, and make it possible to use the Internet for quick and easy vibration / noise analysis. Make it possible.

[0005]

FIG. 1 shows an embodiment of the present invention. After starting, the vibration / noise analysis software 1 creates a table 2 for managing analysis data. The management table 2 includes analysis attributes such as basic attributes 3 to be analyzed, analysis conditions, analysis operator, analysis date and time, analysis version, various file names or storage addresses of CAD models, analysis models, and analysis results. It is composed of analysis data management information 4, a judgment value 5 of the analysis result, and a memo 6 of a change of the analysis condition. The analysis data management table 2 is a management table database 7
Is accumulated in When creating the analysis management table 2,
Indices may be entered into the analysis management table 2 or, from the second analysis, can be retrieved from the management table database 7 based on the representative basic attributes 3 and quoted and copied. Accumulate every time. The analysis data corresponding to the analysis data management information 4 is stored in the analysis database 8. Next, the vibration / noise analysis software 1 creates a table 9 for managing knowledge for analysis and design reference. The management table 9 includes basic attributes 10 to be analyzed and knowledge management information 11 including file names or storage addresses of various knowledge. The knowledge management table 9 is stored in the management table database 7.
When creating the knowledge management table 9, an index may be entered into the knowledge management table 9, and from the second analysis,
Management table database 7 with typical basic attributes 10
You can search and quote from. This knowledge management table 9 is 2
In principle, the index does not need to be changed after the first time, but an index may be added as needed. Knowledge corresponding to the knowledge management information 11 is stored in the knowledge database 12. next,
In the vibration / noise analysis software 1, shape data is read in a routine 13. If the analysis data management information 4 includes CAD data or drawing indices, it is retrieved from the analysis database 8 and brought.

Reference is made to the physical property data of the analysis database 8 using CAD data or drawings and, if necessary, to the design knowledge and the knowledge of analysis modeling of the knowledge database 12, and 14 FEM (finite element method). Create FEM mesh by preprocessor. Further, the vibration / noise analysis software 1 has an automatic conversion routine 15 for converting mesh data of FEM to combined data of SEA.
Automatic creation of three-dimensional sound absorbing material elements is also performed. The boundary condition setting routine 16 calculates parameters for modeling the non-reflective boundary of the outdoor space. In the next routine 17, an external power action point or a vibration / noise reference point for external power inverse analysis is set on the mesh data. FEM mesh data and SEA analysis data are stored in the analysis database 8. Further, the number of vibration modes and the coupling loss coefficient are calculated to assemble the coefficient matrix of the equilibrium equation, and triangular decomposition is performed at 18. The subsequent route differs depending on the condition of the external input power. If the external input power is unknown, the route of (2) is selected, the actual vibration / noise measurement value is set at 18, and the vibration / noise power is obtained at routine 20 by inverse analysis. This is to identify vibration sources and noise sources in consideration of not only the airborne sound but also the effect of the solidborne sound. When the contributions of the vibration source and the noise source to the evaluation points are required, the vibration / noise power calculated in 20 is passed through the route of (3) and 21
Calculate the contribution. When calculating the vibration and noise at each point, it is possible to use the route of (2)-(3)-(5) or (2)-(4) depending on the necessity of the degree of contribution. If the calculation of vibration and noise is unnecessary after calculating the contribution, (2)-(3)-
Proceed along the route of (6). If the external input powers are known and their contributions need to be measured, (1)-(8)-(5)
Follow the route. When the external input powers are known and their contributions are unnecessary, the vibration noise is calculated by the route of (1)-(7). Analyze the calculation results in the database 22
Put in.

After the calculation at the predetermined frequency is completed, 23
Judge the calculation result. A standard for determination is determined, and the determination result is expressed quantitatively. The criterion is stored and referred to as part of the permissible criterion data 24 in the knowledge database 12. The quantitative determination result is 25, which is entered into the analysis data management table 2 together with the analysis condition change memo 6 as the determination result data 5 of the analysis result. When performing calculations under different analysis conditions or targets, the determination values can be referred to as necessary.

[0008] Vibration and noise allowable reference values differ depending on the basic attributes such as the specification, location, and owner of the object to be analyzed, and are determined by the relevant organization. These reference values are collected and stored as allowable reference data 24, and can be searched and referred to by an index of a basic attribute or an index such as a file name or a storage address of the knowledge management information 11 of the knowledge management table 9. When the design standards are published on the Internet, their URLs are entered in the allowable standard data 24.
Stored in the knowledge management information 11 of the knowledge management table 9 and searched by the index of the basic attribute.
5 and acceptance criteria data 27 through the Internet 26
Allows search and reference of allowable values from.

The vibration / noise analysis system 1 is connected to the Internet 26, and a start button 28, a stop button 29 or a UR of the vibration / noise analysis system 1
L, by displaying the system name, the user can start and stop the system from the Internet terminal 30 through the Internet. FIG. 2 shows a specific example of a service business in which analysis software and knowledge can be used. A user of the vibration / noise analysis system receives a message requesting the use of the vibration / noise analysis system to a vibration / noise analysis service provider (1). On the other hand, the vibration / noise analysis service provider presents the contents and fee of the vibration / noise analysis service menu. Alternatively, when a menu is selected, the charge of each menu and the total charge may be automatically displayed (2). The user confirms the content and the fee, and applies for use (3). Vibration and noise analysis service providers, on the other hand, provide several methods to select a payment method for usage fees. For example, a method in which the user remits money to a vibration / noise analysis service provider, or a method in which the vibration / noise analysis service provider withdraws from the user's account may be used (4). When the user answers this (5), the vibration / noise analysis service provider approves the use of the vibration / noise analysis system and informs the password (6). A user accesses the vibration / noise analysis system using a password via the Internet and performs vibration / noise analysis. At this time, if the contents of the contracted menu are included, CA
D data, mesh data, physical property data, excitation source data, and various kinds of knowledge in the knowledge database 12 may be used (7). When the user reports that the use of the vibration / noise analysis system has been completed or at predetermined intervals, the vibration / noise analysis service provider notifies the usage fee. Also,
The usage fee may be automatically displayed as appropriate, or the user may be allowed to search (8). The fee is settled according to the selected method (9). On the other hand, when the vibration / noise analysis service provider can know the contents of the vibration / noise analysis with the consent of the user, it negotiates the purchase of the analysis model and the analysis know-how as necessary. At that time, the company will negotiate the data disclosure range and show the price (10). If the user agrees (11), the vibration / noise analysis service provider pays the user a fee and obtains the right to use according to (10) (12). Also, if another user B has applied for the use and found that there is a shortage in the analysis function or modeling, and the user requests a function extension for a fee (1
3) A single or multiple vibration and noise analysis service providers
Indicate the use of the modification to the CAE system developer and issue an inquiry (14). There is an estimate from the CAE system developer (15), and after agreement between both parties, the vibration and noise analysis service provider orders work from the CAE system developer. (1
6) After remodeling work by CAE system developer (1
7), the vibration and noise analysis service provider pays the CAE system developer for compensation (18). The vibration / noise analysis service provider presents the new function to the user (19). Depending on the proportion of the modification cost burden of user B of the modification requester, exclusive use right for a fixed period is given. If the proportion of the cost burden of the user B is small, other users can be used simultaneously with the user B at a predetermined fee (20).

FIG. 3 shows a data file structure of a vibration / noise analysis service provider, a user, and a CAE system developer.

[0011] It can be changed by a selection menu.

[0012]

According to the present invention, the vibration / noise analysis of various devices can be quickly performed without possessing the vibration / noise analysis software, the influence of the vibration source and the noise source can be grasped, and the vibration / noise analysis can be performed. The suppression can be performed effectively. Total cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a vibration / noise analysis / analysis system according to the present invention.

FIG. 2 is a specific diagram of a business according to an embodiment of the present invention.

FIG. 3 is a diagram showing items of contents of a business data file according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vibration / noise analysis software, 2 ... Analysis data management table, 3 ... Basic attributes of analysis object, 4 ... Analysis data management information, 5 ... Judgment value of analysis result, 6 ... Memo of change of analysis condition, 7 ... Management table database, 8: analysis database, 9: knowledge management table, 10: basic attributes to be analyzed, 11: knowledge management information, 12: knowledge database, 1
4 FEM preprocessor, 15 FEM-SEA automatic conversion routine, 20 reverse analysis routine, 21 vibration source and noise source contribution analysis routine, 23 analysis result determination unit, 24 allowable vibration and noise reference data, 26 ... Internet, 27
... vibration / noise permissible standard data, 30 ... Internet terminal.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yojiro Hayashi 603, Kandamachi, Tsuchiura-shi, Ibaraki Pref. Industrial Machinery Systems Division, Hitachi, Ltd. Shinichi Shimoide (72) 502 Shinkane, Tsuchiura-shi, Ibaraki F-term (reference) 2M064 AA11 AB15 CC29 DD29 5B075 ND02 NK06 UU40

Claims (4)

[Claims] 1. A system consisting of a structure, a fluid, and the ground is modeled by a structural element, an acoustic element, and a non-reflective boundary element, and an external input power applied to the element from the outside, an internal loss power dissipated in the element, and a coupling element. Constructs an equilibrium equation between the transmitted powers transmitted to the robot, solves the equilibrium equation to find the kinetic energy of each element, and calculates the vibration or noise and calculates the external input power from the reference point vibration and noise. A statistical energy analysis method (SE) that has the function of analyzing the overall vibration and noise and the function of calculating the contribution of vibration and noise sources to the evaluation points of the target system
A) vibration and noise analysis software based on the basic attributes of the analysis target (product name, specifications, owner, location), analysis conditions, analysis workers, analysis date, analysis version, C
The AD model, analysis model, analysis results such as the file name or storage address of analysis results, and the evaluation results of analysis results are graded, and an index indicating the stage with numerical values or symbols is provided for single analysis or multiple analysis. A vibration table, characterized by combining a management table characterized by the fact that a database system capable of searching, referencing or accumulating data by using the index of the table is provided.
Noise analysis system. 2. A file name or a storage address of a database in which the analysis know-how of the vibration / noise analysis software of claim 1 and the knowledge such as trouble cases and countermeasures of an analysis object are stored. A vibration / noise analysis system characterized in that a search is performed using indices based on various attributes, a new index is added to a management table, and knowledge can be referenced from a database using the index of the knowledge data. 3. The management table according to claim 1 or 2, wherein a design standard defining allowable values of vibration and noise, a file name or a storage address thereof, and a URL for referring to the design standard on the Internet are stored in a database. A vibration / noise analysis system that refers to the design standard value corresponding to the specification, location, or owner of the object to be analyzed through a database or the Internet and compares the analysis result with the analysis result to determine whether or not the standard is acceptable. 4. A start / stop button or a UR on a homepage so that the vibration / noise analysis system according to claim 1, 2 or 3 can be started / stopped on the Internet.
L. A service business that displays the system name and allows the applicant to use analysis software and knowledge.