Modal analysis of an assembly

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experimental modal analysis was carried out on the real structure of this pump assembly. At several locations of the surface trans-ducers were placed and the response due to the hammer test was identified in terms of frequencies and modal shapes. This result was correlated with the finite element results to update the finite Now for my assembly, I'll try to design it beyond this value to avoid resonance condition. But as of now I'm not sure how this assembly will be mounted (boundary condition).. So I do a free free modal analysis of this assembly and see whether its global frequency is nearby to the rotating disc frequency or not. This is an example of Modal Analysis applied on a part by using FEA module in Autodesk Inventor 2014. The Modal Analysis is useful when we want to find out what are the resonant frequencies of a rigid body when a certain vibration occurs. Jul 06, 2017 · I want to make a modal analysis of an assembly made of 2 parts with different properties : one is a kind of plate (mixed-shells elements) and the other one is a solid part (trias elements). These parts are bolted together with some bolts. There is a pic as a simple representation of my assembly. STRUCTURAL AND MODAL ANALYSIS OF MULTI STAGE CENTRIFUGAL PUMP ROTOR ASSEMBLY USING DIFFERENT MATERIALS. Koduri Ramarao 1, D Deepu 2, V V Kamesh 3. 1 Research Scholar, Department of Mechanical Engineering, Aditya College of Engineering & Technology, Surampalem, Andhra Pradesh, India. Aug 16, 2016 · Figure 1. Modal Analysis of Cantilevered Beam; Relative Displacement. If you’re familiar with Modal analyses, then there should be nothing new here. In fact, this is a popular case study, so if you’ve seen it before feel free to jump to Part 2. If you are new to modal analyses, then let’s discuss this a bit… Ultrasonic stack assembly is the heart of this machine. Modeling of ultrasonic stack assembly is done in solid works 2014. Modal analysis was performed to determine the vibration characteristics of the system with and without pre-stress effect using Ansys 19.2 workbench. The solution of random vibration problems is formulated in the frequency domain (see Simulation help: Analysis Procedure - Random Vibration).. After running the study, you can plot root-mean-square (RMS) values, or psd results of stresses, displacements, velocities, etc. at a specific frequency or graph results at specific locations versus frequency values. Now for my assembly, I'll try to design it beyond this value to avoid resonance condition. But as of now I'm not sure how this assembly will be mounted (boundary condition).. So I do a free free modal analysis of this assembly and see whether its global frequency is nearby to the rotating disc frequency or not. Apr 02, 2015 · In simple terms, Modal Analysis is a CAE analysis to identify the resonance frequency (Mode) of a structural model. There are significant advantages in using this approach to analyze these types of structures. The model is verified by an experimental modal analysis system, which has been shown to be effective in the study of small structures. The modelled modal parameters agree within 4.5 percent with the experimental results for 14 modes. Ultrasonic stack assembly is the heart of this machine. Modeling of ultrasonic stack assembly is done in solid works 2014. Modal analysis was performed to determine the vibration characteristics of the system with and without pre-stress effect using Ansys 19.2 workbench. The modal domain concerns component mode synthesis (CMS) techniques such as the Craig-Bampton, Rubin and McNeal method. These methods provide efficient modal reduction bases and assembly techniques for numerical models in the physical domain. The frequency domain is more popularly known as Frequency Based Substructuring (FBS). Jul 06, 2017 · I want to make a modal analysis of an assembly made of 2 parts with different properties : one is a kind of plate (mixed-shells elements) and the other one is a solid part (trias elements). These parts are bolted together with some bolts. There is a pic as a simple representation of my assembly. Figure 3 on the left shows example Analysis Settings for a static nonlinear pre-stress analysis that will send its deformed shape and pre-stress condition to a downstream modal analysis. Of particular interest for modal analysis is the plan for pre-stress output data required by the modal analysis. Dec 04, 2015 · This feature is not available right now. Please try again later. Now for my assembly, I'll try to design it beyond this value to avoid resonance condition. But as of now I'm not sure how this assembly will be mounted (boundary condition).. So I do a free free modal analysis of this assembly and see whether its global frequency is nearby to the rotating disc frequency or not. Ultrasonic stack assembly is the heart of this machine. Modeling of ultrasonic stack assembly is done in solid works 2014. Modal analysis was performed to determine the vibration characteristics of the system with and without pre-stress effect using Ansys 19.2 workbench. Aug 16, 2016 · Figure 1. Modal Analysis of Cantilevered Beam; Relative Displacement. If you’re familiar with Modal analyses, then there should be nothing new here. In fact, this is a popular case study, so if you’ve seen it before feel free to jump to Part 2. If you are new to modal analyses, then let’s discuss this a bit… This is an example of Modal Analysis applied on a part by using FEA module in Autodesk Inventor 2014. The Modal Analysis is useful when we want to find out what are the resonant frequencies of a rigid body when a certain vibration occurs. Ultrasonic stack assembly is the heart of this machine. Modeling of ultrasonic stack assembly is done in solid works 2014. Modal analysis was performed to determine the vibration characteristics of the system with and without pre-stress effect using Ansys 19.2 workbench. Static and Modal Analysis of Base Frame for Steam Turbine Prasad Darapureddy1, Ch. Srinivas2, R. Lalitha Narayana3 1PG Student, 2Associate professor, 3Head of the Department g Modal Analysis ! Process for determining the N natural frequencies and mode shapes 5 Modal/Harmonic Analysis Using ANSYS ME 510/499 Vibro-Acoustic Design Dept. of Mechanical Engineering University of Kentucky Modal Analysis g Given “suitable” initial conditions, the structure will vibrate ! at one of its natural frequencies ! Feb 19, 2014 · Based on the results I would guess not, however it's bit strange as ansys automatically transfers every contact into a rigid one, which is anyhow necessary for an eigenfrequency analysis. P.S. I wanted to do a modal analysis using formed assembly as meshing was much easier to achieve with lower numbers of elements and most imoprtantly no errors ... Jan 01, 2017 · Modal analysis or Natural frequency analysis is usually carried out for complex structures by 2 means. Practical testing (Shaker bed test/using an impact hammer) Using Finite element techniques (Boundary element method/Finite element method) Modal Analysis with Altair OptiStruct / HyperMesh Some hints All components in the model must have material and properties assigned/defined. Make sure units are consistent and density is defined. (Example - if model is in mm for Steel then: Youngs Modulus = 210.000 MPa, Density = 7.9e-9 t/mm3) Modal analysis is typically a free or Jan 01, 2017 · Modal analysis or Natural frequency analysis is usually carried out for complex structures by 2 means. Practical testing (Shaker bed test/using an impact hammer) Using Finite element techniques (Boundary element method/Finite element method) For different vibration frequencies, vibration mode analysis is undertaken. The deformation law of the herringbone gear assembly in the inherent vibration frequency is obtained and the rationality of gear design is verified. Modal analysis is the study of the dynamic properties of linear structures, based on structural testing or finite element analysis-based simulation. These dynamic properties include resonance frequencies (also called “natural frequencies” or “eigenfrequencies”) and structural modes (or “eigenmodes”). There are significant advantages in using this approach to analyze these types of structures. The model is verified by an experimental modal analysis system, which has been shown to be effective in the study of small structures. The modelled modal parameters agree within 4.5 percent with the experimental results for 14 modes. STRUCTURAL AND MODAL ANALYSIS OF MULTI STAGE CENTRIFUGAL PUMP ROTOR ASSEMBLY USING DIFFERENT MATERIALS. Koduri Ramarao 1, D Deepu 2, V V Kamesh 3. 1 Research Scholar, Department of Mechanical Engineering, Aditya College of Engineering & Technology, Surampalem, Andhra Pradesh, India. The Story Behind ANSYS Innovation. If you've ever seen a rocket launch, flown on an airplane, driven a car, used a computer, touched a mobile device, crossed a bridge or put on wearable technology, chances are you've used a product where ANSYS software played a critical role in its creation. Jan 17, 2014 · Therefore, this article attempts to finite element analysis (FEA) and experimental modal analysis (EMA) a combination of pre-test analysis techniques for certain avionics PCB assembly (Figure 1) analysis of the dynamic characteristics and the establishment of the Finite element analysis model kinetic PCB assembly. Modal analysis is the process of determining the inherent dynamic characteristics of a system in forms of natural frequencies, damping factors and mode shapes, and using them to formulate a mathematical model for its dynamic behaviour.