Hyperworks is a division of altair engineering support contact. Getting started with hyperworks, import, export, open, save, working with panels, rotate, zoom, pan. In every development of a new or improved mechanical product, structural dynamics testing on product prototypes is used to assess its real dynamic behavior. In fact the format of the input decks are nearly identically. Im able to get both natural frequencies and mode shapes of my model, but im now wondering if it is possibile to get the modal assurance criterion mac too.
Patran tutorial linear static analysis of a composite. What is the application of free free modal analysis and. Fem methods and detailed explanation of any one method d. Typical application is rotor dynamics, where gyroscopic damping effects are important.
Normal modes analysis of a clamping set in this tutorial, an existing. Moreover, hypermesh has robust tools to cleanup imported cad geometry that contain surfaces with gaps, overlaps and misalignments which hinder highquality mesh generation. E 200x109 nm2 and 8000 kgm3 modal analysis results the frequency of each targeted mode is. Pdf optistruct 2017 tutorials and examples gonzalo. Modal frequency response analysis is widely used in structural dynamic analysis because of its computational saving over d irect f requency respo nse anal ysis. I left it for a while and i could finally see some results. Pdf modal frequency response optimization in optistruct.
In addition to creating solid models and assemblies, 2d drawing view can also be. Modal analysis error altair hypermesh altair forum. Mode tracking is available for rotor dynamics with complex eigenvalue analysis. With this feature you can automatically create the load collectors and load steps in hypermesh to run different structural simulation in optistruct, namely modal analysis and frequency response function dedicated to electromagnetic vibration synthesis. Hypermeshs userinterface is easy to learn and supports many cad geometry and finite element model files increasing interoperability and efficiency. And it takes advantage of hypermesh and ansys to set up the finite element model of the tire and to analyze the tire structural dynamics, laying a foundation for setting. Tire modal analysis of ansys and hypermesh under co. Modal analysis free vibration of a 2d plate preprocessing via altair hypermesh part 1. One of the familiar meshing and analysis package is hypermesh by altair. Optistruct for linear dynamics modal, frf, and transient analysis. Ability to optimize the angle as well by creating phantom ply.
However i find it really weird, since with other motors i reach steady state instantly. Hypermesh 07 2d plate modal analysis modal analysis free vibration of a 2d plate preprocessing via altair hypermesh part 1 solution via md nastran part 2. Facebook is showing information to help you better understand the purpose of a page. Psd analysis of an arm bracket using optistruct youtube. Supported by the streamlined, intuitive workflows in hypermesh, running nonlinear analysis in optistruct is easier and more powerful than ever. With a strong focus on accuracy, speed and scalability, and easeofuse, altair optistruct 2019 adds significant new functionality for nonlinear analysis, detailed output options for improved diagnostics, large scale parallelization through gpu support, and new design. Rotor energy from a complex eigenvalue analysis can be requested via the. Modal analysis of chisel subsoiling shovel, arrow subsoiling shovel and doublewings subsoiling shovel were made, which was based on the analysis of the vibration characteristics of subsoilersoil. Modal analysis tutorial natural frequency analysis and optimization. Writes data in current hypermesh session to nonhypermesh files types iges, optistruct, radioss, etc.
A tire modal testing system is built on the basis of the previous studies. The simple cantilever beam is used in all of the dynamic analysis tutorials. Modal analysis is significant in evaluating the mode shapes generated by a component under vibrational excitation, as the mode shapes can be used to determine the displacement or response of the component under the influence vibration in real life application. Principles of vibration analysis with femap and nx nastran. I have done modal analysis of a structure with on boundary conditions, thus i get first 6 rigid body modes which have zero frequencies. You also update existing cards by using the card panel. Two ansys elements, beam4 and pipe16, allow gyroscopic effects to be specified in the form of real constant spin rotational speed, radianstime. Defining the problem the simple cantilever beam is used in all of the dynamic analysis tutorials. Pdf hypermesh 2017 tutorials abaqus solver interface. Modal analysis tutorial natural frequency analysis and. This method uses the mode shapes of the structure to uncouple the equations of motion when no damping or only modal damping is used and, depending on the number of modes computed and retained, reduce the problem. Learn meshing with hypermesh and perform linear static analysis with optistruct 3. The material properties for the cantilever beam are. Modal analysis with altair optistruct hypermesh some hints all components in the model must have material and properties assigneddefined.
Simply supported beam bending exercise using hyperbeam. The geometry of the steel frame from the given engineering drawing is constructed using the cad sketcher tool that comes prebuilt with the inspire software or using hypermesh. In this article we will only details the setup of the three first types. Suv frame modal analysis based on hypermesh scientific. A dynamic modal analysis of a steel frame is conducted using two cae tools from altair hyperworks, namely optistruct and solidthinking inspire.
I merged the components of the frame with boolean solid edit and then i meshed the geometry with tetramesh. As an example, here is a complex optistruct model on which the frf functions have been calculated. When to use 2 d elements, family of 2 d elements, how not to mesh, quality checks of 2d elements. Modal analysis 85 is used to determine the natural frequencies or. Guidelines to modal analysis and setup using hypermesh for. Crane hooks are the components which are generally used to elevate the heavy load in industries and constructional. Altair optistruct is an industry proven, modern structural analysis solver for linear and nonlinear simulation under static and dynamic loadings. The only exception is in a modal analysis, where you can run the analysis freefree, that is, unconstrained. As a preliminary analysis perform free vibration analysis to obtain 30 vibration modes and their natural frequencies.
Accelerating complex linear and nonlinear analysis processes from hypermesh to optistruct. Hypermesh was used to transfer the cad model into a fea model, which was then used to run dedicated analysis and simulation tasks. A listing of hypermesh files that have been worked on previously loads the file and replaces the model in the current session. Hypermesh is one of commercial offtheshelf softwarea ready made software to perform particular task for finite element analysis the entire process of fea can be classified into three groups 1. Cad interoperability hypermesh includes direct readers to popular native cad file formats. If you havent created the model in ansys, please use the links below.
The paper is aimed to analyze and get a further understanding of the dynamic characteristics of the tire by means of computing modal analysis. In general in finite element analysis modal analysis is conducted in two. Altair optistruct continues to grow rapidly as a comprehensive solution for structural analysis and optimization. In addition, the webinar will feature hypermesh tutorials case study that shows users how vmap can be used to solve vibration problems in automotive products during the. Project files download hypermesh core tutorial download basics hm. Gravity analysis guidelines and setup using hypermesh for nastran. Hypermesh 2019 modal transient dynamic analysis with. Ansys tutorial modal harmonic analysis using ansys me 510499 vibroacoustic design dept. Today, modal analysis has become a widespread means of finding the modes of vibration of a machine or structure figure 3. Opens the export browser allowing specification of directory and name recent files. Optimizationenabled structural analysis altair optistruct.
Leave all the default values and enter 40 into the element size field. Ansys tutorials modal analysis of a cantilever beam. Results obtained using optistruct and inspire are compared with the given experimental modal analysis results. As a result we can image the later improved design of. To fulfill the requirements for crash and modal analysis, the company used optistruct to optimize the component, radioss and other external solver to run the calculations and hyperview for the post processing. One suv frame in the report was analyzedfeawith fe software hypermesh,modal calculated with nastran,and then we analyzed the results with hyperview.
Modal analysis of the steel frame using freefree condition is performed in both, optistruct and solidthinking inspire. In addition to creating solid models and assemblies, 2d drawing view can also. Experimental modal analysis of gear box casing webinar hosted by techpassion focusing on expermiental modal analysis of a gear box casing along with an electromagnetic shaker. Student contest, hyperworks students education, optimisation contest, aoc 2012, altair optimisation contest. Gravity analysis guidelines and setup using hypermesh for nastran duration. Im doing a modal analysis using hypermesh as pre and post processor, and nastran as solver. Experimental modal analysis of a flat plate subjected to. Make sure units are consistent and density is defined.
Modal assurance criterion for nastran in hypermesh. How to run nastran with hypermesh basically, the preparation and postprocessing of a nastran model in hypermesh is the same as preparing a model for optistruct. What is the application of free free modal analysis and constrained. I wanted to know how to identify the local and the global modes from a modal analysis obtained over a range of frequencies. You start with a hypermesh database file that does not have any dictionaries assigned. Fortunately,we obtained five natural frequencies which show that the natural frequencies of the frame above the road surface exciting frequency,where would be no resonance occur. Hypermesh also offers a highlycompetitive suite of tools for cfd meshing. Description tutorials description for hyperworks 2017 account 157.
Mechanical design normal modes analysis of a clamping set in this tutorial, an existing finite element model of a clamping set a top part for magnetic chuck will be used to demonstrate how to. This pdf explains hoe to perform basic modal analysis in hyperworks. Analysis setup, the methods and techniques explored here are applicable to a setup in any solver. Creating a hexahedral mesh using the solid map function. Modal frequency response analysis sol 111 modal frequency response analysis is an alternate method to compute frequency response. Frequencyharmonic response analysis nastran sol 111. Advanced functionality within hypermesh allows users to efficiently mesh high fidelity models. Apply the surface load a loads define loads apply structural pressure on beams pick all b enter the value 0 in the box for node i ansys will automatically set the load for node j assuming a uniform. The modehng of the conventional components and the sandwich components. Nonlinear explicit analysis is now supported, enabling simulation of drop tests, impact analysis, and more. We also attempt to study how the amplitude of exciting force and loading changes affect the tire modal test, which lays a foundation for applying the tire modal test into. Modal analysis of a cantilever beam introduction this tutorial was created using ansys 7. Hypermesh will automatically select all of the surfaces that enclose the volume.
Life cycle analysis of automobile components webinar hosted by techpassion focusing on the life cycle analysis of automobile components. If this fails, there are still errors in the volume and need to be corrected using the geometry cleanup tools. Now starting from the 7th mode, the frequency rises. Imacxviii18th182501abrieftutorialsubstructureanalysistesting. Studying the model the normal process for setting up an analysis would be the setup of materials, properties and components before the meshing of the model. Psd analysis in optistruct using frequency response process. Pdf optistruct 2017 tutorials and examples gonzalo anzaldo. The analysis and application of the tire modal lay a solid foundation for mediumhigh frequency tire mechanical model which is being established by our research group. Damping is normally ignored in a modal analysis, but if its effects are significant, the damped method is used. Guidelines to modal analysis and setup using hypermesh for nastran. Advanced functionality within hypermesh allows users to efficiently mesh. Introduction crane hooks are highly liable components and are always subjected to failure due to accumulation of large amount of stresses which can eventually lead to its failure. Guidelines to modal analysis and setup using hypermesh for nastran duration.
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