Automated Assembly Model Simplification for Finite Element Analysis

2012 ◽  
Author(s):  
Brian Russ ◽  
Madan M. Dabbeeru ◽  
Andrew S. Chorney ◽  
Satyandra K. Gupta
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Complex Model ◽  
Model Simplification ◽  
Assembly Model ◽  
Element Analysis ◽  
Cad System ◽  
Computational Performance ◽  
Long Time ◽  
3D Assembly

Analyzing complex 3D assembly models using finite element analysis software requires suppressing parts that are not likely to influence the analysis results, but may significantly improve the computational performance during the analysis. The part suppression step often depends on many factors within the context and application of the model. Currently, most analysts perform this step manually. This step can take a long time to perform on a complex model and can be tedious in nature. In this paper, we present an approach to multi-part suppression based on the specified criteria. We have developed utilities in Pro/Engineer CAD system to identify parts that meet the specified criteria and suppress them. We present several examples to illustrate the value of the proposed approach.

Suppressing Features to Generate Simplified Models for Finite Element Analysis

2011 ◽  
Author(s):  
Brian Russ ◽  
Madan M. Dabbeeru ◽  
Andrew S. Chorney ◽  
Daniel Skelley ◽  
Satyandra K. Gupta
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mesh Size ◽  
3D Models ◽  
Complex Model ◽  
Element Analysis ◽  
Cad System ◽  
Computational Performance ◽  
Long Time ◽  
Rule Based Approach

Analyzing complex 3D models using finite element analysis software requires suppressing parts that are not likely to influence the analysis results, but may significantly improve the computational performance both in terms of mesh size and mesh quality. The feature suppression step often depends on the context and application. Currently, most analysts perform this step manually. This step can take a long time to perform on a complex model and can be tedious in nature. In this paper, we present a rule-based approach to feature suppression. We have developed a decision-tree based representation for capturing feature suppression rules. We have also developed utilities in Pro/Engineer CAD system to identify features that meet these rules and suppress them. We present several examples to illustrate the value of the proposed approach.

Finite Element Analysis of the Car Door Sinking Stiffness

2013 ◽  
Vol 712-715 ◽  
pp. 1131-1134
Author(s):  
Hong Jun Liu ◽  
Shu Ya Zhi
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Assembly Model ◽  
Element Analysis ◽  
Analysis Process ◽  
Element Method

This paper describes an analysis process of the sinking stiffness that is a simplified car door model using finite element method. First, it has set the car doors assembly model in ANSYS with the APDL command flow. Then phenomena and data are obtained from the experiment. At last, by optimization is got from the analysis of this data. So it can provide methods and references of the optimization of a car door structure.

Non-Loosening Performance of Plastically Pre-Deformed Nuts Under Cyclic Loads

2012 ◽  
Author(s):  
Yasumasa Shoji ◽  
Susumu Kumakura ◽  
Toshiyuki Sawa
Keyword(s):  
Finite Element Analysis ◽  
Plastic Deformation ◽  
Finite Element ◽  
Pressure Vessels ◽  
Cyclic Loads ◽  
Significant Issue ◽  
Research Activity ◽  
Research Papers ◽  
Element Analysis ◽  
Long Time

Self-loosening of bolts and nuts is a significant issue for bolted fasteners. In recent years, this problem has been a hot topic in the field of pressure vessels and piping. Several research papers have been presented from several institutes and the mechanism and phenomena have been almost understood. This paper offers a countermeasure based on the authors’ long time research activity on the non-loosening performance of various types of nuts. Their research has indicated that prescribed plastic deformation of nut heads may prevent or decrease loosening. This phenomenon was reproduced using Finite Element Analysis.

Finite Element Analysis of Contact Stress for Herringbone Gear

2014 ◽  
Vol 945-949 ◽  
pp. 137-141
Author(s):  
Ke Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Contact Stress ◽  
Assembly Model ◽  
Element Analysis ◽  
Static State ◽  
Gear Design ◽  
Herringbone Gear ◽  
Ansys Workbench

Use UG to model and assemble herringbone gear. Through the ANSYS Workbench software, the engaging characteristics of the static state herringbone gear assembly model were confirmed and the analysis was executed to verify the gear design rationality.

A Rectified Statistical Energy Analysis Method Using Finite Element Analysis

2006 ◽  
Author(s):  
Xian-Jun Wu ◽  
Jian-Hua Cao ◽  
Shi-Jian Zhu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Analysis ◽  
Input Power ◽  
Analysis Method ◽  
Coupling Loss ◽  
Element Analysis ◽  
Long Time ◽  
Two Parameters ◽  
Single Part

Two parameters, namely modal number (Nm) and modal overlap factor (Mo), are used as the indicators of the reliability of SEA prediction. It is suggested that Mo>1 and Nm>5 can be used to judge if the SEA prediction is reliable in prediction of plate vibration. In the mid-frequency, those conditions are hard to satisfy. Although it takes long time and great expense and even it is impossible to apply finite element analysis to the whole structure, it is economically to calculate a local single part and coupled parts. If the value of input power and coupling loss factor can be replaced by the value calculated by FEM, the precision of SEA can be greatly improved. Calculation example was given and the validity was proved.

The Finite Element Analysis of Longmen Type Frame on Large Thickness Flame Cutting Machine

2013 ◽  
Vol 274 ◽  
pp. 253-256
Author(s):  
Yong Qiu Chen ◽  
Yu Lai Ma ◽  
Yong Kui Han
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Model Simplification ◽  
Element Analysis ◽  
Large Thickness ◽  
Finite Element Software ◽  
Weakest Link ◽  
Cutting Machine ◽  
The Finite Element Analysis ◽  
Main Factors

In this paper, finite element analysis was used to study the whole stiffness on the Longmen type frame by Pro/MECHANICA, the model simplification and mesh principle were elaborated, as well as the advantage of Pro/MECHANICA with adaptive P-method technology and with the traditional finite element software with non-adaptive H-method technology. The weakest link of the whole stiffness on the Longmen type frame was found out. The three main factors of affecting the whole stiffness was put forward to.

scholarly journals Study of the Dynamic Behaviour of Circular Membranes with Low Tension

2019 ◽  
Vol 9 (21) ◽  
pp. 4716
Author(s):  
Antonia Lima-Rodriguez ◽  
Antonio Gonzalez-Herrera ◽  
Jose Garcia-Manrique
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tympanic Membrane ◽  
Dynamic Behaviour ◽  
Numerical Solutions ◽  
Element Analysis ◽  
Geometric Configurations ◽  
Long Time ◽  
Tension Plate ◽  
Low Tension

The dynamic behaviour of membranes has been widely studied by well-known authors for a long time. A clear distinction can be made between the behaviour of membranes without tension (plate case) and membranes subjected to large tension or pre-strain in their plane (membrane case). In classical theories, less attention has been paid to membranes subjected to a low level of tension, which solution is between both extreme cases. Recently, certain fields of research are demanding solutions for this intermediate behaviour. It is the case of membranes present in MEMS and sensor or the response of the tympanic membrane in mammals hearing system. In this paper, the behaviour of plates and circular membranes with boundary conditions clamped in the edges has been studied. The natural frequencies for both cases (plate and membrane) have been calculated using the solutions of the traditional theories and these have been compared with the numerical frequencies calculated by finite element analysis. The dynamic response of membrane with low tension, corresponding to a transition between these extreme behaviours, has also been calculated. A theoretical solution has been used complemented with a wide set of numerical finite elements calculations. The analytical and numerical solutions are very close, being the error made using both methods very low; nevertheless, there are no analytical solutions for the entire transition zone between the plate and membrane behaviour. Therefore, this range has been completed using finite element analysis. Broad ranges of geometric configurations have been studied. The transition behaviour of the membrane has been clearly identified. The main practical consequences of these results have been discussed, in particular focused on the response of the tympanic membrane.

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