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Flow Induced Vibration


Halaman ini saya tujukan buat rekan-rekan yang sedang belajar masalah vibrasi pada pipa yang berkaitan dengan masalah dynamic stress, vibration velocity, pokoknya yang buat kita stress dah hahaha.. Berikut ini ada beberapa jurnal dalam bentuk file pdf yang telah saya siapkan buat anak bangsa, tanpa dipungut biaya sepeser pun. Monggo diunduh ya..

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1. Analisa Vibrasi Sisyem Pipa Penyalur Gas-Liquid (Multiphase) untuk Meningkatkan Produktivitas Gas Total E&P Indonesie / Vibration Analysis of Multiphase Well Flowline Piping System for Gas Production Improvement at Total E&P Indonesie.pdf

Abstrak

Salah satu cara untuk meningkatkan produktivitas dengan tidak mengganggu proses produksi yaitu dengan meningkatkan jumlah flowrates dan tanpa merubah konfigurasi sistem perpipaan. Hal ini tentunya akan mengakibatkan pipa mendapatkan beban dinamis yang lebih besar dari sebelumnya sehingga berpotensi terjadi vibrasi yang melebihi limitasi yang akhirnya bisa menyebabkan pipa mengalami kegagalan. Dalam penelitian ini dilakukan suatu kajian mengenai pengaruh peningkatan jumlah flowrates terhadap kekuatan pipa terutama pada daerah sekitar SBC (Small Bore Connection). Analisa dilakukan secara manual dengan pendekatan Likelihood of Failure (LOF) Method yang merupakan perhitungan konservatif untuk mengetahui apakah vibrasi yang terjadi masih dalam batas toleransi dan dilakukan dengan pemodelan secara numerik untuk analisa kekuatan pipa secara statis dengan menggunakan software CAESAR 4.2, dan menganalisa kekuatan pipa secara dinamis pada bagian SBC dengan menggunakan software ANSYS Multiphysics 11.0 dengan variasi beban pressure akibat fluida yang mengalir yang telah diperoleh sebelumnya dari hasil output software ANSYS CFD. ANSYS CFD sendiri digunakan untuk analisa fluida yaitu menghitung pressure yang dihasilkan oleh fluida yang mengalir dengan beberapa variasi flowrates pada inlet. Pada analisis aliran fluida didapatkan bahwa peningkatan flowrates pada inlet berbanding lurus dengan pressure yang dihasilkan oleh fluida yang mengalir. Sedangkan untuk analisa kekuatan pipa secara dinamis akibat beban pressure fluida diperoleh flowrates maksimum yang masih diijinkan pada tegangan von Mises maksimum 20,9 MPa adalah sebesar 63,7 MMscfd. Sehingga kesimpulannya, produktivitas gas pada pipa flowline NB102 dapat ditingkatkan dari 50 MMscfd menjadi 63,7 MMscfd atau sekitar 27% dari kapasitas awal


One of the solution for production improvement without stopping the production process is improving the flowrates without any changing on the piping system configuration. It will cause the piping system has a greater dynamic force. Increasing flowrates also caused vibration on piping system. Therefore piping system could fail due to the vibration force exceed the limitation criteria. This project studying influence of increasing flowrates to pipeline strength especially on Small Bore Connection (SBC) area. Analysis is conducted manually with Likelihood of Failure (LOF) Method approach, which is a conservative assessment to be used for ensuring piping systems with acceptable vibration and fatigue characteristic, and numerical modeling by CAESAR 4.2 for static analysis of piping systems and ANSYS 11.0 for dynamic analysis of SBC with variable pressure load condition. Pressure load is taken from analyse fluid flow with several flowrates data at inlet are used. From the analysis, it is obtain that increasing flowrates is linearly with pressure of fluid flow. And for dynamic analysis of SBC due to pressure load condition, it is obtain that allowable maximum flowrates on maximum von Mises Stress condition (20,9 MPa) is 63,7 MMscfd. So, the conclusion is the gas production of NB 102 can be improved from 50 MMscfd up to 63,7 MMscdf or equal to 27% from design capacity.

Keywords: flowrates, flowline, small bore connection, LOF, fluida, inlet

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2. Evaluation Dinamic Stess of Pipeline.pdf

Abstrak:

Piping vibration is as much of a concern to utility owners and operators as to federal regulatory bodies. Many programs have been developed to assure reliability and plant safety with respect to vibration while minimizing cost and delay during plant start-up. The acceptance of a piping system vibration is determined by the maximum vibratory stress in the pipe. This could be determined by either visual observation or by more complicated instrumentation measurement and analysis techniques as the situation may require. In either case, the dynamic stress should not exceed an allowable level defined from permissible alternating stress values given by the ASME Code for a given number of cycles. Since direct dynamic stress measurement is a complicated process, vibration is mainly monitored by using portable instruments to perform frequency and amplitude measurements. The following approach presents the fast and reliable way to evaluate the harmonic dynamic stresses of a simply supported pipeline from the data collected on the field. Furthermore, with the versatility of the personnel computer the piping stress software’s user could obtain fairly easily the dynamic stress without having a solid background of the dynamic vibration. This present approach also offers a basic understanding to solve quickly vibration problem when and where the computer software is not accessible.


3. FIV Line Like Structure.pdf

Abstrak:

An overview of different types of flow induced vibrations pertaining to line-like, marine structures is given. Galloping, flow interference and jumps from a wall are covered by means of a discussion of some behavioral characteristics, analysis tools and examples. Also the possibility of a \drag crisis”, due to drag reduction at high Reynolds numbers, is discussed. A brief review of differences between vibrations in water and air is given, and a numerical solution of the Navier-Stokes equations to find the load on a group of cylinders are referred.


4. Flow Rate Measurements Using Flow Induced Pipe Vibration.pdf

Abstrak: This paper investigates the possibility of developing a no intrusive, low-cost, flow-rate measurement technique. The technique is based on signal noise from an accelerometer attached to the surface of the pipe. The signal noise is defined as the standard deviation of the frequency-averaged time-series signal. Experimental results are presented that indicate a nearly quadratic relationship over the test region between the signal noise and flow rate in the pipe. It is also shown that the signal noise–flow rate relationship is dependent on the pipe material and diameter.


5. Fluid Induced Vibration of Composite Natural Gas Pipelines.pdf

Abstrak:

Advancements in materials bonding techniques have led to the use of reinforced composite pipelines. The use of steel pipe with a fiber-reinforced composite over-wrap together has produced an exceptionally strong pipe with positive advantages in weight and corrosion resistively. Understanding the dynamic characteristics of this kind of sub-sea composite pipelines, which often accommodate axial flow of gas, and prediction of their response is of great interest. This paper presents a state-variable model developed for the analysis of fluid-induced vibration of composite pipeline systems. Simply supported, clamped and clamped-simply supported pipelines are investigated. The influence of fluid’s Poisson ratio, the ratio of pipe radius to pipe-wall thickness, laminate lay-up, the ratio of liquid mass density to pipe-wall mass density, the fluid velocity, initial tension and fluid pressure are all considered. The results of our proposed methodology are compared with those of finite element analysis, using ANSYS software.


6. Displacement Methode for Determining Acceptable Piping Vibration Amplitudes.pdf

7. Axial Flow Induced Vibration of a Rod Supported by Two Translational Springs.pdf

Abstrak:

An axial-flow-induced vibration model was proposed for a rod supported by two translational springs at both ends. For the derivation of the vibration model, the normal mode method was used to solve the random vibration problem of the cylinder subjected to the randomly fluctuating pressure acting on its surface by axial flow. The first natural frequency and mode shape functions for the flow-induced vibration, so-called FIV, model were derived by using Lagrange’s method based on the single mode approximation. The vibration displacement at reactor conditions were calculated by the proposed model for the spring-supported rod and by the previous model for the simple-supported(SS) rod. The resulting vibration displacement for the spring-supported rod was larger than that of the SS rod, and the discrepancy between both displacements was much larger at low flow velocity than at high flow velocity. The vibration displacement for the spring supported rod appeared to decrease with the increase of the spring constant.


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30 Comments »

  1. mas ak download smua yah artikelnya
    thank

    Comment by WAHYU KURNIAWAN | March 1, 2009 | Reply

  2. OK bro.. Download ajah…
    Thx yah udah jalan2 sampe sini hehe..

    Comment by vladvamphire | March 1, 2009 | Reply

    • mas,,,makasih yah….hhe

      Comment by Dedi | September 17, 2011 | Reply

  3. saya minta ya artikel nya….

    thanks.

    Comment by didin | March 4, 2009 | Reply

  4. Yup.. silahkan Din..

    Comment by vladvamphire | March 4, 2009 | Reply

  5. saya minta artikelnya ya mas…
    makacie

    Comment by venna | March 6, 2009 | Reply

  6. mas aku minta juga yg ini y?…thanks bgt mas. btw gmn cerita tuh km bisa terdampar di nigeria?

    Comment by riyo | May 15, 2009 | Reply

  7. ALHAMDULILLAH

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    YANG SENANG BERBAGI ILMU

    WOI………MABA SA’KAMPUSE its….TELADANI CAK VLADIMIR YO………..

    oia Cak…. salam kenal….

    Salam,

    Comment by mukhlis adam | May 30, 2009 | Reply

    • Salam kenal juga yah..
      Semoga smuanya bermanfaat bagi kita semua.
      Merdeka!

      Comment by vladvamphire | May 30, 2009 | Reply

  8. cak, kalo dgn nastran bisa nggak yo, n aku cuma punya ansysyg lebih rendah 4.5kalo nggak salah, apa bisa digunakan, makasih yo…

    Comment by hasnan | August 3, 2009 | Reply

  9. salam kenal bro.. nice article.. menolong abnget nie

    iriansyah putra

    Comment by irian | August 27, 2009 | Reply

  10. Ijin download mas… moga2 jadi barokah buat mas.

    Comment by ekapm | September 17, 2009 | Reply

  11. salam kenal mas

    Comment by irian | September 23, 2009 | Reply

  12. Ijin download ya..thanks banget..

    Comment by Darwin | November 20, 2009 | Reply

  13. tulisan anda sangat membantu…terimakasih

    Comment by bek | January 7, 2010 | Reply

  14. mas saya ijin download y fileny..trims

    Comment by Coco | February 14, 2010 | Reply

  15. mas,, tau ga pengaruh dari tekanan udara pada ruang resonator gitar terhadap frekuensi spektrum nya??
    terus klo mau nyari referensi text book nya kira2 apa yah mas??
    thx before..

    Comment by ruben | March 15, 2010 | Reply

  16. salam kenal.. ijin donlot artikel2nya yaa.. tks a lot..🙂

    Comment by Firman Tuakia | March 22, 2010 | Reply

  17. Minta ijin download artikel-nya yaaa. Thanks

    Comment by aditya | March 23, 2010 | Reply

  18. Teori dasarnya bagus.. gue download ah. Lumayan.

    Comment by aditya | March 23, 2010 | Reply

  19. permisi mas tak download artikel nya… wokehhh

    Comment by wahyu aji | May 19, 2010 | Reply

  20. mantab jaya

    Comment by ihwan | June 28, 2010 | Reply

  21. ijin download semua mas ya..😀

    Comment by Rengga | July 9, 2010 | Reply

  22. mas vlad izin download ya

    Comment by cepy | April 29, 2011 | Reply

  23. thx kk artikelnya..

    Comment by anakmesin | May 5, 2011 | Reply

  24. bang ijin download nih,,,
    makasih, , , ,

    Comment by Dedi | May 25, 2011 | Reply

  25. mas vlad.. niy putri_07..
    Ijin mo donlot artikelnya…
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    Comment by putri | July 5, 2011 | Reply

  26. saya ada tutorial SolidWorks, Catia, MasterCAM, Fluent, ANSYS
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    Comment by mustofa assidiqi | December 3, 2011 | Reply

  27. Bagus sekali Blognya Mas….Ijin Download Artikelnya ya….Thanks a lot atas sharing ilmunya! Semoga makin sukses.

    Comment by ekow | March 28, 2012 | Reply

  28. Pak “nyicip” tulisannya ya.

    Comment by Albet | May 31, 2012 | Reply


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