Resource Library

Search For:

Filter By:

Industry:

Sub Industry:

Product Category:

Product Name:

Show:
  View All Resources
  Article
  Brochure
  Case Study
  Conference Paper
  Presentation
  Technical Brief
  White Paper
  Demo
  Video
  Webinar
  Testimonial
  Other


Sort By:

 

 

Page  152 of 187    152 153 154 155 156
Conference Papers

Finite Element Analysis Model in Automotive Shifter Design

FEA proves to be an extremely useful in the design of shifters. A finite element model for our shifter assembly was setup with reference of our corporate shifter test standards. The assembly model took account of the main components. It can represent the real test scenarios. The forces between components were properly transferred in the assembly model. Such a model can offer a great capacity for design engineers to evaluate concept designs, investigating the various performances and features of each component and the whole shifters. Totally, three concept designs were evaluated with the assembly FEA model. Such a model can save a lot of real tests, greatly reducing the design costs and tremendously speed up our design cycle. ANSYS is proved to be a very efficient way to help design better products.

View Now (PDF)

Add to briefcase  

Conference Papers

Design Optimization of a Weather Radar Antenna using Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD)

• Weather antenna positioning is a very complex mechanism and some knowledge is required for the effective design and implementation;
• The air flow around the antenna can affect directly the positioning mechanism behavior;
• FEA and CFD models are useful for obtaining the knowledge about the plant without the need of physical construction of a model or prototype for experimentation;
• CFD analysis can be used to determine the air flow pressure field and the vortex separation frequency;
• FEA modal analysis is useful for determining the natural frequencies of the structure and for the qualification, validation and approval of the mechanisms after they are built.

View Now (PDF)

Add to briefcase  

Conference Papers

Car Cavity Acoustics using ANSYS

• The study of vehicle interior acoustics in the automotive industry has gained importance due to – Legal restrictions – Growing demand for comfort – To reduce the number of prototypes – High performance of modern computers
• The objectives of efficient automobile design are – Safety – Fuel consumption – Interior comfort
• The challenges are – Lower weight improves the fuel efficiency but increases the vibrational sensitivity – Increase in weight generally improves the safety

View Now (PDF)

Add to briefcase  

Conference Papers

Automated FE Analysis Applications in Energy Industry

-

View Now (PDF)

Add to briefcase  

Conference Papers

FEM Analysis of a CVT Pulley

A failure analysis has been carried out on a riveted half pulley mounted on the CVT system of the new Piaggio 850cc twin engine. First of all, different design variants have been analysed with simplified models, in order to single out the one with the best performance. The best configuration has then been re-analysed with a more detailed model, including the stress state induced by the riveting process, which has been simulated with a separate model. The working conditions corresponding to Piaggio standard endurance cycle have been used to estimate the fatigue damage withstood by the component. Finally, the critical working condition has been singled out and the corresponding stress state has been compared with the one arising during Piaggio standard bench test for the component under examination.

View Now (PDF)

Add to briefcase  

Conference Papers

An Assessment of ANSYS Contact Elements

The ANSYS code offers stress analysts a variety of contact element options: point-to-surface or surface-tosurface and low-order or high-order elements, in concert with any one of five contact algorithms (augmented Lagrangian, penalty method, etc.). This raises questions as to what option performs best under what circumstances. Here we offer some answers to these questions by examining performance in some numerical experiments. The numerical experiments focus on frictionless contact with a rigid indenter; even so, the number of experiments involved is quite large. The experiments use a battery of test problems with known analytical solutions: contact patch tests with nodes matching and nonmatching, Hertzian contact of a cylinder and a sphere, and Steuermann contact of a strip punch with three different edge radii. For each of these test problems, three successively systematically-refined meshes are used to examine convergence. All told, over five hundred finite element analyses are run. Results for this class of problems are the same for the augmented Lagrangian (AL, the default) and the penalty method (PM) algorithms. There is also no difference between results found with the two Lagrange multiplier (LM) algorithms. Thus together with results for the fifth contact algorithm (IMC-internal multipoint constraint), we have but three distinct sets of results. The results for the AL and PM algorithms are good for all problems provided they are used with surfaceto- surface elements. The results for the LM algorithms can be quite sensitive to matching of the nodes on the indented material with those on the indenter. When nodes matched, these algorithms also gave good results. The IMC algorithm, while the fastest, did not give good results for the problems examined. When algorithms worked well, there was little difference in accuracy between low-order and high-order elements.

View Now (PDF)

Add to briefcase  

Conference Papers

Efficient Multi-Physics Transient Analysis Incorporating Feedback-Dependent Boundary Condition

This paper describes the ANSYS simulation of an electrostatically-actuated MEMS device, in which the drive voltages are computed using feedback control laws. The device consists of a movable electrode suspended on flexible, elastic structures, and one or more fixed drive electrodes. The feedback control laws are used to determine the level of a variable voltage supply in a drive circuit for each drive electrode, and take inputs such as the total charge on the drive electrode, and the position of various points on the movable electrode. The simulation requires the solution of coupled structural and electrostatic field equations, and presents two challenges for a standard ANSYS multifield analysis. The first is that the boundary conditions for each load step are not known beforehand, but are generated by the controller logic based on the output of the previous simulation step results. The second is that the elements used to model the drive electrode control circuitry are incompatible with the electrostatic elements. We present several extensions that enable this analysis. We eliminate the circuit elements from the model, and instead propagate the associated states in an APDL macro. To allow efficient solution of the closed-loop model we incorporate an adaptive step size Runge-Kutta integration routine within this macro. Implementation of the adaptive step size routine speeds some transient simulations by a factor of more than 100. We present results for representative MEMS devices including a one-DOF piston microactuator and a two-DOF rotating/translating microactuator.

View Now (PDF)

Add to briefcase  

Conference Papers

CFD Analysis of Mixed Flow Pump

The study pertains to the CFD application for mixed flow hydraulic pumps. Authors have done CFD analysis of mixed flow pump (Nsq. = 46.00 Metric) at duty point and also at part load. The results of the study brought out following findings. 1. Head predicted by CFD analysis is 5 to 10 % higher at rated point as well as at part load, than the test result. The nature of Head versus Capacity curve is similar to that of standard mixedflow pump curve. 2. Power predicted by CFD analysis is 5 to 10% higher at rated point. Disc- friction power loss calculated using standard method and added to CFX generated power for estimating total power requirement. The nature of Power versus Capacity curve is similar to that of standard mixed flow pump curve. 3. Efficiency predicted by CFD analysis is higher than the test results. Leakage loss was predicted and volumetric efficiency was determined. Pump efficiency, considering disc-friction loss and leakage-loss was predicted and that is within + 5% range, at duty point. At off-design point, variation in efficiency was found. CFD analysis has clearly brought out the secondary flow/recirculation in stator at duty point which caused reduction in efficiency. This is improved by matching stator blade angle with respect to flow angle and changing hub-curve profile. The paper also includes the results of steady state analysis of original geometry and comparison of test result and CFD analysis result. The comparison of results of original and modified geometry was presented.

View Now (PDF)

Add to briefcase  

Conference Papers

Damage of Reinforced Concrete Walls from Shock and Impact

-

View Now (PDF)

Add to briefcase  

Conference Papers

3-D SQCE Model and its Application in Fracture Mechanics

In this paper, the 3-D SQCE crack element model was developed. A number of 3-D crack example problems were solved and compared with analytical and published numerical solutions. The results showed that the SQCE model provides a consistent and accurate solution technique to calculate stress intensity factor (SIF) and solve SIF controlled fatigue problems. Compared to most of the singular element models, the three-dimensional SQCE model gives a generalized methodology to combine local analytical solution with finite element interpolation functions to create specific elements and is relatively simple in programming. This formulation procedure can be used to compute stress intensity factors of 2-D and 3-D crack problems, stress concentration problems as well as other engineering problems with singularity or high gradient of field variables. For crack problems, only the local solutions of Mode I, II and III are needed to obtain SIFs of 3-D cracks with any shape.

View Now (PDF)

Add to briefcase  

Page  152 of 187    152 153 154 155 156