JPH04254734A - Evaluating apparatus of stress of piping system - Google Patents

Evaluating apparatus of stress of piping system

Info

Publication number
JPH04254734A
JPH04254734A JP3036918A JP3691891A JPH04254734A JP H04254734 A JPH04254734 A JP H04254734A JP 3036918 A JP3036918 A JP 3036918A JP 3691891 A JP3691891 A JP 3691891A JP H04254734 A JPH04254734 A JP H04254734A
Authority
JP
Japan
Prior art keywords
stress
piping
model
analysis
piping system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3036918A
Other languages
Japanese (ja)
Other versions
JP3046850B2 (en
Inventor
Moriyoshi Suzuki
盛喜 鈴木
Toshio Tanaka
敏夫 田中
Mamoru Tanaka
守 田中
Yoshitsugu Nekomoto
善続 猫本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP3036918A priority Critical patent/JP3046850B2/en
Publication of JPH04254734A publication Critical patent/JPH04254734A/en
Application granted granted Critical
Publication of JP3046850B2 publication Critical patent/JP3046850B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To make it possible to evaluate a stress simply at all necessary places by a method wherein a vibrational characteristic of a vibration analysis model is made to accord with the vibrational characteristic measured by an accelerometer and the stress of each part of a piping system is evaluated by estimation. CONSTITUTION:Accelerometers 1 are fitted at several places to a branch piping 3 connected to a main piping 2, and the piping 3 is supported by a fixed wall through a support 8 and provided with a valve 7, etc. The accelerometers 1 deliver outputs to a personal computer 6 through amplifiers 4 etc. In the computer 6, an analysis model is prepared by modeling the piping 3, and the frequency of this model and the sensitivity for a change in the vibration in a normal mode of the model are determined by analysis respectively. Subsequently, the frequency of an actual piping and that of the analysis model are compared with each other, the frequencies of them are made to accord with each other with the rigidity of the support and the mass of the valve adjusted, and thereby a final analysis model is determined. By using this model, a response analysis is executed and the correspondence of a response acceleration to a generated stress is made clear. Based on this, the stress is estimated from a signal of acceleration measured from the actual piping and evaluation of the stress is conducted.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は配管系の応力評価装置に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping system stress evaluation device.

【0002】0002

【従来の技術】図3斜視図に示すような配管系において
、主配管2の振動により分岐配管3が振動し、その振動
により分岐配管の付根部等に損傷が生じることがある。 そこで、従来は同図に示すように、分岐配管3の各所に
ひずみゲージ21を貼り付け、その出力信号をアンプ4
及びA/D変換器5を介してパーソナルコンピューター
6に入力し、そのひずみの計測結果をもとに配管の応力
評価を行っている。図4はこの応力評価装置のソフトウ
エアを示したフロー図である。
2. Description of the Related Art In a piping system as shown in the perspective view of FIG. 3, the branch piping 3 vibrates due to the vibration of the main piping 2, and the vibration may cause damage to the base of the branch piping. Therefore, conventionally, as shown in the figure, strain gauges 21 are pasted at various locations on the branch pipe 3, and the output signals are sent to the amplifier 4.
The strain is input to the personal computer 6 via the A/D converter 5, and the stress in the piping is evaluated based on the strain measurement results. FIG. 4 is a flow diagram showing the software of this stress evaluation device.

【0003】0003

【発明が解決しようとする課題】しかしながらこのよう
な従来の配管系の応力評価装置では下記の問題がある。 (1) 従来の装置では応力が発生すると考えられる箇
所にすべてひずみゲージを貼りつける必要があり、作業
に手間がかかる。 (2) ひずみゲージを貼りつけるには熟練した技術が
必要であり、手軽に行うことはできない。 (3) ひずみゲージを貼りつけていない箇所の応力評
価はできない。本発明はこのような事情に鑑みて提案さ
れたものであり、貼りつけ作業に手間を要することなく
、配管系の必要とするすべての箇所応力が簡単に求めら
れる配管系の応力評価装置を提供することを目的とする
However, such conventional piping system stress evaluation devices have the following problems. (1) With conventional equipment, it is necessary to attach strain gauges to all locations where stress is likely to occur, which is time-consuming. (2) Attaching strain gauges requires a skilled technique and cannot be done easily. (3) It is not possible to evaluate stress in areas where strain gauges are not attached. The present invention has been proposed in view of these circumstances, and provides a piping system stress evaluation device that can easily determine stress at all required points in the piping system without requiring time and effort for pasting work. The purpose is to

【0004】0004

【課題を解決するための手段】そのため本発明は対象と
なる配管系の振動解析モデルが作成されているコンピュ
ーターと、対象となる配管系に取り付けられている加速
度計と、該加速度計の測定データを前記コンピューター
に入力するためのアンプとA/D変換器とを具え、前記
振動解析モデルの振動特性を、前記加速度計から測定さ
れた振動特性と合致させることによって、対象となる配
管系の各部の応力を推定評価することを特徴とする。
[Means for Solving the Problems] Therefore, the present invention provides a computer in which a vibration analysis model of a target piping system is created, an accelerometer attached to the target piping system, and measurement data of the accelerometer. and an A/D converter for inputting the data into the computer, and by matching the vibration characteristics of the vibration analysis model with the vibration characteristics measured from the accelerometer, each part of the target piping system is It is characterized by estimating and evaluating the stress of

【0005】[0005]

【作用】このような構成によれば配管に取り付けるのは
加速度計であり、その個数は数個で良く、取扱いが容易
である。また、解析モデルを用いて発生応力を推定する
ので、任意の点の応力が得られる。
[Operation] According to such a configuration, only a few accelerometers are attached to the piping, and the number of accelerometers is only a few, making it easy to handle. Furthermore, since the generated stress is estimated using an analytical model, the stress at any point can be obtained.

【0006】[0006]

【実施例】本発明の一実施例を図面について説明すると
、図1はその全体斜視図で、主配管2に接続された分岐
配管3が対象とする配管であり、これに加速度計1を数
か所に取り付ける。一般に分岐配管3は幾つかのサポー
ト8を介して固定壁に支持されており、所々に弁7等が
設置されている。加速度計1からの出力はアンプ4及び
A/D変換器5を介してパーソナルコンピューター6に
入力する。図2はこの応力評価装置のソフトウエアのフ
ローを示す図であり、コンピューター内では図示のよう
に分岐配管3を分岐配管ビームモデル13,サポート剛
性11,バルブ質量12でモデル化し、解析モデル作成
10を行う。次にこのモデルの振動数を固有振動解析1
4によって求める。求められた振動数は通常実機配管振
動数計測16の結果とは異なるが、これはサポート剛性
11や弁質量12のモデル化のときの設定が実際のもの
と異なることによるものと考えられる。
[Embodiment] An embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is an overall perspective view of the same, in which a branch pipe 3 connected to a main pipe 2 is the target pipe, and an accelerometer 1 is attached to this pipe. Attach it in place. Generally, the branch pipe 3 is supported by a fixed wall via several supports 8, and valves 7 and the like are installed here and there. The output from the accelerometer 1 is input to a personal computer 6 via an amplifier 4 and an A/D converter 5. FIG. 2 is a diagram showing the software flow of this stress evaluation device. In the computer, the branch pipe 3 is modeled using a branch pipe beam model 13, support rigidity 11, and valve mass 12 as shown in the figure, and an analysis model creation step 10 is performed. I do. Next, the frequency of this model is determined by natural vibration analysis 1.
Find it by 4. The obtained frequency is usually different from the result of the actual piping frequency measurement 16, but this is considered to be because the settings of the support rigidity 11 and the valve mass 12 when modeling were different from the actual ones.

【0007】そのため、モデルの振動数を実機のそれに
一致させるように、サポート剛性11やバルブ質量12
を調整する必要がある。そこで、サポート剛性11,バ
ルブ質量12の変更によるモデルの固有振動数変化に対
する影響(感度)を感度解析15によって求める。実機
配管の振動数と解析モデルの振動数の比較17を行い、
感度を用いてサポート剛性11やバルブ質量12を調整
しながら両者の振動数を一致させ、最終的な解析モデル
を決定する。求められた解析モデルを用いて応答解析1
9を行い、応答加速度と発生応力との対応を明らかにす
る。これをもとに、実機で計測される加速度信号18か
ら応力を推定し、応力評価20を行うことができる。
[0007] Therefore, in order to match the vibration frequency of the model to that of the actual machine, the support rigidity 11 and the valve mass 12 are adjusted.
need to be adjusted. Therefore, the influence (sensitivity) on changes in the natural frequency of the model due to changes in the support rigidity 11 and valve mass 12 is determined by sensitivity analysis 15. A comparison17 was made between the frequency of the actual piping and the frequency of the analytical model.
The final analysis model is determined by adjusting the support rigidity 11 and valve mass 12 using sensitivity to match the vibration frequencies of both. Response analysis 1 using the obtained analytical model
9 to clarify the correspondence between response acceleration and generated stress. Based on this, stress can be estimated from the acceleration signal 18 measured by the actual machine, and stress evaluation 20 can be performed.

【0008】[0008]

【発明の効果】本発明によれば、次のような効果が得ら
れる。 (1) 加速度計を数ケ所に取り付けるだけなので、計
測,評価時間が短くて済む。 (2) 設置作業は容易で、熟練は必要とせず誰でも手
軽に行うことが可能である。 (3) 応力は解析モデルから推定するため任意の点で
、多くの発生応力を推定評価できる。 (4) 局部の応力だけでなく、分岐配管全体の応力,
変位,加速度等の応答が把握できる。 要するに本発明によれば、対象となる配管系の振動解析
モデルが作成されているコンピューターと、対象となる
配管系に取り付けられている加速度計と、該加速度計の
測定データを前記コンピューターに入力するためのアン
プとA/D変換器とを具え、前記振動解析モデルの振動
特性を、前記加速度計から測定された振動特性と合致さ
せることによって、対象となる配管系の各部の応力を推
定評価することにより、貼りつけ作業に手間を要するこ
となく、配管系の必要とするすべての箇所応力が簡単に
求められる配管系の応力評価装置を得るから、本発明は
産業上きわめて有益なものである。
[Effects of the Invention] According to the present invention, the following effects can be obtained. (1) Since accelerometers are only installed in several locations, measurement and evaluation time can be shortened. (2) The installation work is easy and does not require any skill and can be easily performed by anyone. (3) Since stress is estimated from an analytical model, many generated stresses can be estimated and evaluated at any point. (4) Not only local stress but also stress of the entire branch piping,
Responses such as displacement and acceleration can be understood. In short, according to the present invention, a computer in which a vibration analysis model of a target piping system is created, an accelerometer attached to the target piping system, and measurement data of the accelerometer are input into the computer. The system includes an amplifier and an A/D converter for estimating and evaluating the stress in each part of the target piping system by matching the vibration characteristics of the vibration analysis model with the vibration characteristics measured from the accelerometer. As a result, the present invention is extremely useful industrially because it provides a piping system stress evaluation device that can easily determine stress at all required points in the piping system without requiring much time and effort in pasting work.

【図面の簡単な説明】[Brief explanation of the drawing]

【図1】本発明の一実施例を示す全体斜視図である。FIG. 1 is an overall perspective view showing an embodiment of the present invention.

【図2】図1における応力評価装置のソフトウエアのフ
ロー図である。
FIG. 2 is a software flow diagram of the stress evaluation device in FIG. 1;

【図3】公知の配管系の応力評価要領を示す説明図であ
る。
FIG. 3 is an explanatory diagram showing a known stress evaluation procedure for a piping system.

【図4】図3における従来の応力評価装置のソフトウエ
アのフロー図である。
FIG. 4 is a software flow diagram of the conventional stress evaluation device in FIG. 3;

【0009】[0009]

【符号の説明】[Explanation of symbols]

1  加速度計 2  主配管 3  分岐配管 4  アンプ 5  A/D変換器 6  パーソナル・コンピューター 7  バルブ 8  サポート 9  固定壁 10  解析モデル作成 11  サポート剛性 12  バルブ質量 13  枝配管ビームモデル 14  固有振動解析 15  感度解析 16  実機配管振動数計測 17  実機振動数と解析モデルの振動数比較18  
実機加速度信号計測 19  応答解析 20  応力評価 21  ひずみゲージ 22  実機ひずみ計測
1 Accelerometer 2 Main piping 3 Branch piping 4 Amplifier 5 A/D converter 6 Personal computer 7 Valve 8 Support 9 Fixed wall 10 Analysis model creation 11 Support rigidity 12 Valve mass 13 Branch piping beam model 14 Natural vibration analysis 15 Sensitivity analysis 16 Measurement of actual machine piping frequency 17 Comparison of actual machine frequency and analysis model frequency 18
Actual machine acceleration signal measurement 19 Response analysis 20 Stress evaluation 21 Strain gauge 22 Actual machine strain measurement

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  対象となる配管系の振動解析モデルが
作成されているコンピューターと、対象となる配管系に
取り付けられている加速度計と、該加速度計の測定デー
タを前記コンピューターに入力するためのアンプとA/
D変換器とを具え、前記振動解析モデルの振動特性を、
前記加速度計から測定された振動特性と合致させること
によって、対象となる配管系の各部の応力を推定評価す
ることを特徴とする配管系の応力評価装置。
Claim 1: A computer in which a vibration analysis model of a target piping system is created, an accelerometer attached to the target piping system, and a computer for inputting measurement data of the accelerometer to the computer. Amplifier and A/
D converter, the vibration characteristics of the vibration analysis model are
A piping system stress evaluation device characterized in that the stress in each part of the target piping system is estimated and evaluated by matching the vibration characteristics measured by the accelerometer.
JP3036918A 1991-02-06 1991-02-06 Piping system stress evaluation device Expired - Lifetime JP3046850B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3036918A JP3046850B2 (en) 1991-02-06 1991-02-06 Piping system stress evaluation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3036918A JP3046850B2 (en) 1991-02-06 1991-02-06 Piping system stress evaluation device

Publications (2)

Publication Number Publication Date
JPH04254734A true JPH04254734A (en) 1992-09-10
JP3046850B2 JP3046850B2 (en) 2000-05-29

Family

ID=12483148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3036918A Expired - Lifetime JP3046850B2 (en) 1991-02-06 1991-02-06 Piping system stress evaluation device

Country Status (1)

Country Link
JP (1) JP3046850B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7289863B2 (en) 2005-08-18 2007-10-30 Brooks Automation, Inc. System and method for electronic diagnostics of a process vacuum environment
WO2009041404A1 (en) 2007-09-25 2009-04-02 Kabushiki Kaisha Toshiba Oscillation evaluation device and evaluation method
JP2021021647A (en) * 2019-07-29 2021-02-18 国立大学法人群馬大学 Abnormality detection system for information board

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7289863B2 (en) 2005-08-18 2007-10-30 Brooks Automation, Inc. System and method for electronic diagnostics of a process vacuum environment
WO2009041404A1 (en) 2007-09-25 2009-04-02 Kabushiki Kaisha Toshiba Oscillation evaluation device and evaluation method
JP2021021647A (en) * 2019-07-29 2021-02-18 国立大学法人群馬大学 Abnormality detection system for information board

Also Published As

Publication number Publication date
JP3046850B2 (en) 2000-05-29

Similar Documents

Publication Publication Date Title
JP2768058B2 (en) Vibration test device for structure, vibration test method, and vibration response analysis device
CN106840375A (en) A kind of turbocharger extraordinary noise method of testing and its device
CN104792450B (en) A kind of indirect measurement method of equipment to installation pedestal exciting force
CN111537170A (en) Dynamic stiffness testing method for servo actuator
JP3145625B2 (en) Piping system fatigue evaluation device
EP0671610A2 (en) Method and apparatus for diagnosing sound source and vibration source
US6324290B1 (en) Method and apparatus for diagnosing sound source and sound vibration source
US6575034B2 (en) Characterization of environmental and machinery induced vibration transmissivity
JPH07113721A (en) Vibration testing device, vibration testing method, and vibration testing jig for structure
JPH04254734A (en) Evaluating apparatus of stress of piping system
JP7004005B2 (en) Estimator, estimation method and computer program
JP2004061361A (en) Piping breakage investigating apparatus
JP3396425B2 (en) Shaking table controller
US4031744A (en) Method and apparatus for analyzing a damped structural specimen
KR102032491B1 (en) Method for measuring resistance of model ship using active vibration control technology
JP3114358B2 (en) Structure vibration test apparatus and method
JPH08159929A (en) Method and apparatus for measurement of sound-insulation performance of floor
JP3495594B2 (en) Twin shaking table controller
JP2999513B2 (en) Automatic output of natural frequency of structures
Van der Walt Measurement technique to assess the acoustic properties of a silencer component for transient engine conditions
JPH0755630A (en) Earthquake-resistance experimental system
CN112287541B (en) Information source simulation target simulation method and system for testing acoustic shock sensor
Xu et al. Operational modal analysis of a rectangular plate using noncontact acoustic excitation
CN105889052A (en) Noise separation method for fault diagnosis of slurry pump
JPH0743243A (en) Exciter

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20000216

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080317

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090317

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100317

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110317

Year of fee payment: 11

EXPY Cancellation because of completion of term