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[ pdf ] DESIGN AND ANALYSIS OF CORIOLIS MASS FLOWMETERS USING MSC NASTRAN

``` Download 61 times Topic under  Flow Measurement Source: www.mscsoftware.com  File size: 834 KB File type: pdf Last download on: Sat Mar 25, 2017 02:55:20 PM Short Desciption: A Coriolis mass ilowmeter measures mass flow directly by vibrating a fluid—conveying pipe at resonance. Design of these meters was facilitated by solving the equations of motion via the finite element method. A complex eigenvalue analysis (SOLIU7) was necessary due to the presence of the Coriolis force terms in the damping matrix. Performance parameters of the meter can be predicted from the complex eigenvectors and were found to match experimentally determined values to within five percent Since vibration occurs during Coriolis meter operation, low stress designs must be used to preclude fatigue failure. This analysis was also performed using MSC/NASTRAN Summary: MSC/NASTRAN is used extensively in the design and analysis of Coriolis mass iiowmeters. The early portion of the design cycle focuses on the prediction of meter dynamics. MSC/NASTRAN was used at this stage to solve (SOLlO7) the equations of motion of a custom beam finite element. This finite element was imported into MSC/NASTRAN via DMIG entries. Additionally the linear algebra capabilities of DMAP were used to allow the engineer to analyze an entire spectrum of A mass fiow rates and fiuid process densities with a single finite element model. Standard MSC/NASTRAN elements and solutions were also used at various points in the design cycle to estimate stress. Estimation of stress is necessary to preclude fatigue failure. The ability to predict both meter dynamics and stress in software significantly shortens the development time for new Coriolis mass fiowmeters. Bookmark or share this info on Google+ and leave comment at below : ``` ``` ```

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