Operating deflection shape ods analysis is a powerful tool we use to solve complex vibration related problems in rotating equipment and structures. It determines the vibration pattern of a structure under given operating conditions. Making a 3d ods analysis operating deflection shapes. Vibration measurements are performed at different points and directions on the structure and the vibration pattern can be shown as an animated geometry model of the structure or listed in a. This means that we visualize the vibrations of the machine by animation. Dear vib legends, i am very curious to know about the best software for operating deflection shape ods which is acceptable worldwide by most of the organizations. What is the difference between operating deflection shapes. An ods can be defined from any vibration data, either at a. Operating deflection shapes from strain measurement data. Vibration visualization crystal instruments leading. Hudgins helps you understand and resolve forced vibration problems with a powerful analytical service called ods operating deflection shape analysis. The measurement of the operational deflection shapes of the brake shoes during drum brake squeal, which was in the torsional mode, was similar to that of the modes obtained from the experimental modal analysis of the brake shoes under the incontact static. The animated deflection shapes ads is a method that can help you find the source of problems on running machines by the simple visualization of vibrations.
From operating deflection shapes towards mode shapes using. Time operating deflection shapes ods of an antique bell waveimage modal software module for calculating vibrational properties under operating conditions. The output of the method is easily understandable for everybody. Whats the difference between operating deflection shapes. Operational deflection shape extraction from broadband. Pulse software for acquiring and analysing structural data for analysis of operational modal shapes. Modal analysis and modal testing ods, mimo, oma dewesoft. Operating deflection shapes detect unbalance in rotating.
The deflection of the structure at higher harmonics of the exciting frequency is mapped by a amplitude of deflection aod at higher harmonics as suggested in the literature, and b a new method based on the operational deflection shape ods both amplitude and phase at higher harmonics for the crack detection. Wide range of operational shape deflection testing services. Typically, thousands of measuring points are captured synchronously with every measurement, enabling a holistic analysis of a component under vibration. I would much rather call the data we receive from an operating condition, an. The aim of the present work is to identify the crack in a rotorbearing system using the concept of operational deflection shape and using. Our software we make software for visualizing vibration. The operational deflection shapes were used to identify the mode of vibration for the brake shoes in drum brake squeal. Click to see ods overview video click to see animated samples. If an engineer were to perform some analysis using the prosig software modal analysis they would be said to be performing oma. The best operating deflection shape ods software amp. Now an affordable modal software providing a comprehensive package for modal test, for modal experts as well as novice engineers.
Operating deflection shapes ods, mode indicator functions mif, cola analysis are fully implemented in dewesoft while operational. Operational deflection shape analysis and vibration. Measurements required for displaying operating deflection. Is it a mode shape, or an operating deflection shape. Development of residual operational deflection shape for crack detection in structures. The operational deflection shapes and transient analysis. Clear motion systems provides software for measuring and animation operating deflection shapes of machinery.
The vibration is felt in the steering wheel and seat by the truck occupant. The results of this work provide a new method for detecting machinery unbalance and. If an engineer were to animate a wireframe model using a set of acceleration transmissibility spectra, he would be viewing operating deflection shapes ods. It is well known that in the case of many types of variable speed machines, there usually are certain speeds at which the machine performs poorly, either evidenced by excessive vibration levels or poor quality of the product. Operating deflection shape ods, is a term often used in the structural vibration analysis, known as ods analysis. This definition appears somewhat frequently and is. Intuitive software supporting time, spectral and runupdown operating deflection shapes ods analysis. Operational deflection shape ods and modal analysis are powerful diagnostic tools that. Operational deflection shapes ods from a gas turbine. To determine the structures properties experimentally the modal analysis offers an excellent tool.
As its name suggests operational deflection shape analysis shows the vibration pattern experienced during normal operational condition. The operational modal analysis allows the eigenvalue determination under ambient excitation. Both the amplitude and phase of vibration measurements are animated. Damage detection of beams using operational deflection. In fact, one is always measured in order to obtain the other. Modal analysis for test engineers including operation. Mescopeves has been specifically designed to make it easier for you to observe and analyze a variety of vibration and acoustics problems in machines and structures. Clear motion ods is a program for animating measured vibration. Deflection is a vector quantity, meaning that each of its components has both location and direction associated with it. Measuring operational deflection shapes of fans with a. The purpose is to take my knowledge to the next level serious and advanced level as well.
An operating deflection shape contains the overall vibration for two or more dofs on a machine or structure. An application of operational deflection shapes and spatial filtration for. Mescope software is designed to observe and analyze a variety of vibration, acoustic, and strength of materials problems in machines and structures. Erbessd instruments using digivibemx m30 for making a 3d ods operating deflection shapes analysis with one of t. The variable sampling rate can be enabled to simultaneously record slowchange signals together with high speed vibration data. Figure 1 is an operational deflection shape of a vibration issue in a truck that occurs at cruising speeds. Iconics offers free remote expert assistance software solution during covid19 crisis. Mode shapes and operating deflection shapes are related to one another.
I work with vibration analysis on rotating equipment, and i am learning about ods, and i am also a beginner at ansys. This work is an indepth study of a boundary effect detection bed method for pinpointing locations of small damages in beams using operational deflection shapes odss measured by a. Ods is defined as operational deflection shape somewhat frequently. Webinar identifying operational deflection shapes gom. In experimental modal analysis the exact dynamic behavior of a structure can be determined. Simutech performs machinery vibration diagnostics both in its laboratory and onsite at customer facilities. The purpose is to take my knowledge to the next level serious. A good example of this is found in the paper industry, where production capacity is reduced because the machine may. Extensive overview of mescope software and hands on use about 50% of class time. Operating deflection shapes waveimage modal analysis. Is it a mode shape or an operating deflection shape. I drew an engine and a base, but very basic, just to try to simulate ansys, i set up a project with modal analysis and random vibration. Using operating deflection shapes to detect misalignment in rotating equipment.
This is different from the study of the vibration patterns of a machine under known external forces, which is usually referred to as modal analysis. This bk connect software performs analysis for time, spectral and runupdown ods. Animations of the deflection shapes help visualize the problem. The fea solution would also yield the corresponding strain due to the deflection of the mode shapes. Bk connect operating deflection shapes analysis bruel.
Ods operating deflection shape ansys student community. Artemis extractor is the leading software package for operational modal analysis. Reference free detection of minute, nonvisible, damage using fullfield. Operational deflection shape for crack detection in structures. Shapes can be saved in a table in terms of acceleration, velocity and displacement. Crack detection in a rotor by operational deflection shape. All the other odss display the first mode shape of the free free beams. Making a 3d ods analysis operating deflection shapes youtube. It helps you set up, acquire and then analyse the recorded time data. Ods operational deflection shape software an ods shows how your machine or structure is moving, and whether or not there are excessive vibration levels. The correlation analysis was performed with vic 3d software from correlated solutions inc. A very good tool to analyse large structures like buildings. I request you all to please, please suggest guide help me in finding the best and well accepted software for operating deflection shape.
The modal analysis provides the engineer with the complete hard and software equipment necessary to carry out a successful modal analysis or an operating deflection measurement. Operational deflection shape extraction from broadband events of an aircraft component using 3ddic in magnified images. Easy method used for the visualization of the vibration pattern of a structure as influenced by its own operating forces. Development of residual operational deflection shape for. An operational deflection shape is an animation of the vibration pattern in a structure. Operating deflection shape ods and modal analysis ods services. Users can view and analyze data files with crystal instruments post analyzer. This application oriented software associates the latest algorithms with a user friendly. As optional features for all versions are the data acquisition plugin, allowing direct control of selected data acquisition hardware, and the experimental modal analysis plugin, allowing.
Different animation types and views are supported including sidebyside, overlaid and difference animation. Deflection measured at a point in a specific direction is called a dof degree of freedom. The animated deflection shapes software is based on the method of operating deflection shapes. Operational deflection shapes method in trouble shooting. Visualize dynamically the vibration deflection shapes of mechanical components during their normal operation in both time and frequency domains with our modal software module.
Our experience includes motors, pumps, gearboxes, turbines, fans, piping, conveyor heads and what may be the largest ods test performed in the power industry a turbine generator and two floors of the turbine building. Its industryleading interactive 3d animation allows you to observe orderrelated operating deflection shapes from running machinery, resonant. It is designed for animation of both operating deflection shape ods as well as impact response measurements. The well established software of a commercial scanning laser doppler vibrometer sldv with all its features like definition of the measurement grid, data acquisition, analysis or data presentation is used to scan the grid on. Our expertise results in properly identifying root causes as. The reason is that in beam 2, the crack is located at the centre.
Operating deflection shapes analysis type 7765 operating deflection shapes ods analysis is used for determination of the vibration pattern of a structure under given operating conditions. Operating deflection shape ods analysis is a method used for visualisation of the vibration patterns of a machine or structure caused by unknown operating forces. Whats the difference between operating deflection shapes and mode shapes. Optical 3d metrology enhances the capabilities for the determination of operational deflection shapes and mode shapes by providing accurate fullfield 3d data of shape and displacements. Introduction to operating deflection shapes by vibrant. Ods analysis is a method used for visualisation of the vibration pattern of a machine or structure as influenced by its own operating forces. Operating deflection shapes from strain measurement data timothy g. The oros modal software is designed for modal analysis, structural dynamics and operating deflection shapes ods vibration. Operational deflection shapes ods can be useful to view the vibration patterns of a structure. From operating deflection shapes towards mode shapes using transmissibility measurements. Artemis modal is produced in three versions and the key features are listed below. Pulse operational modal analysis type 8400b 8400f bk connect file importersexporters and finite element model interfaces. Operating deflection shapes test consultant type 7765.
During the animation the vibration movement is slowed down to very low frequency and the amplitude of the motion is increased so we can see the. This article demonstrates the use of the operational deflection shape ods of a rotating machine as a means of detecting unbalance in its rotating components. This pulse labshop software controls operating deflection shapes ods measurements. Import data from data collectors, or use the included daq software to measure vibration. Use more powerful geometry features for shape extraction and animation in bk connect operating deflection shapes analysis. If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Operational modal analysis and deflection shape maultheet. Vibration diagnostics are used to identify the root cause of noise and vibration problems in machinery. During vibration control, all measurement input and drive signals can continuously record to a spidernas or the internal storage residing in each frontend. Yet, they are quite different from one another in a number of ways. It is available in three different versions, light, handy and pro. Using digivibemx m30 for making a 3d ods operating deflection.
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