Vehicle Chassis/Suspension Dynamics Analysis - Finite Element Model vs. Rigid Body Model

1998 ◽  
Author(s):  
Yuan Zhang ◽  
Paul Xiao ◽  
Tim Palmer ◽  
Akbar Farahani
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Rigid Body ◽  
Element Model ◽  
Dynamics Analysis ◽  
Body Model ◽  
Rigid Body Model ◽  
Suspension Dynamics ◽  
Vehicle Chassis

Coupled-Field Analysis of the Compliant Slider Mechanism with Rectangle Flexure Hinges Based on ANSYS

2011 ◽  
Vol 189-193 ◽  
pp. 1897-1900
Author(s):  
Lei Duan ◽  
Li Fang Qiu ◽  
Hai Shan Weng ◽  
Zhi Yong Xie
Keyword(s):  
Finite Element ◽  
Rigid Body ◽  
Element Model ◽  
Field Analysis ◽  
Flexure Hinges ◽  
Body Model ◽  
Coupled Field ◽  
Rigid Body Model ◽  
Relationship Of ◽  
The Relationship

The compliant slider mechanism with rectangle flexure hinges was designed, and its pseudo-rigid-body model was built. The theoretical value of the relationship between force and displacement was given after analysis; the electrostatic-structural-coupled field finite element model of this mechanism was also built and analyzed by ANSYS, and the simulation value of the relationship between voltage and displacement was obtained; According to the relationship of voltage and force, the theoretical value was compared with the simulation value. The result indicates that the model is valid and the analysis is correct.

scholarly journals Influence of External Factors on Airborne Missile’s Horizontal Backward Launching

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Xiao Pan ◽  
Yi Jiang ◽  
Dong Hu ◽  
Huihui Guan
Keyword(s):  
Finite Element ◽  
Rigid Body ◽  
Pitch Angle ◽  
Random Vibration ◽  
Element Model ◽  
Body Model ◽  
Ejection Force ◽  
Ejection Process ◽  
Rigid Body Model ◽  
The Finite Element Model

This paper studies the influence of different external disturbance factors on the horizontal backward separation of airborne missiles on large transport aircraft. The method of comparison with experiment was adopted to verify the accuracy of the finite element model during the ejection process. By comparing the finite element model, it was confirmed that the all rigid body model and partly rigid body model are inaccurate in calculating the pitch angle and pitch velocity of the missile separation. Finally, the influences of ejection force, random vibration, and missile loading position on the ejection process are analyzed. The analysis found that the ejection force and the sliding distance will increase the vibration of the launching platform, therefore increase the separation pitch angle and the pitch velocity of the missile, but the influence of random vibration on platform is much greater than the other two factors, and it will also introduce randomness into the movement of the missile.

Dynamics Research of Ultrasonic Peristaltic Micro-Fluid Driving Model

2011 ◽  
Vol 199-200 ◽  
pp. 1391-1396
Author(s):  
Dan Dan Zhang ◽  
Shou Shui Wei ◽  
Guo Lei Wang ◽  
Chang Zhi Wei
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Traveling Wave ◽  
Element Model ◽  
Transient Dynamics ◽  
Dynamics Analysis ◽  
Response Characteristics ◽  
Amplitude Frequency Response ◽  
Driving Model ◽  
Frequency Response Characteristics

A new ultrasonic peristaltic micro-fluid driving model was presented on the principle of ultrasonic traveling wave and volume displacing mechanism. First, driving principle of the model was introduced and finite element model was developed. Second, the transient dynamics analysis was performed to observe the chambers traveling and the fluid flowing. What’s more, harmonic analysis was done to get its amplitude-frequency response characteristics. Third,the coupling modes filled with fluid was performed to prove its drivng effect. This can provide a guidance for furture fluid structure analysis to get better performance and efficiency.

A Family of Butterfly Flexural Joints: Q-LITF Pivots

2011 ◽  
Author(s):  
Xu Pei ◽  
Jingjun Yu ◽  
Shusheng Bi ◽  
Guanghua Zong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rigid Body ◽  
Rigid Bodies ◽  
The Other ◽  
Element Analysis ◽  
Leaf Type ◽  
Center Shift ◽  
Body Model ◽  
Rigid Body Model

The Leaf-type Isosceles-Trapezoidal Flexural (LITF) pivot consists of two compliant beams and two rigid-bodies. For a single LITF pivot, the range of motion is small while the center-shift is relatively large. The capability of performance can be improved greatly by the combination of four LITF pivots. Base on the pseudo-rigid-body model (PRBM) of a LITF pivot, a method to construct the Quadri-LITF pivots is presented by regarding a single LITF pivot (or double-LITF pivot) as a the configurable flexure module. Ten types of Q-LITF pivots are synthesized. Compared with the single LIFT pivot, the stroke becomes larger, and stiffness becomes smaller. Four of them have the increased center-shift. The other four have the decreased center-shift. One of the quadruple LITF pivots is selected as the examples to explain the proposed method. The comparison between PRBM and Finite Element Analysis (FEA) result shows the validity and effectiveness of the method.

FEM Based Statics Analysis of the Main Steel Structure of Bucket Wheel Stacker-Reclaimer

2013 ◽  
Vol 690-693 ◽  
pp. 1933-1939
Author(s):  
Peng Shang ◽  
Wei Zhou ◽  
Chun Xia Li ◽  
Yu Ming Guan
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Rigid Body ◽  
Carrying Capacity ◽  
Steel Structure ◽  
Element Model ◽  
Body System ◽  
Turning Motion ◽  
Integral Structure ◽  
Simplified Finite Element Model

Bucket wheel stacker-reclaimer is kind of a typical multi-rigid-body system. Its main steel structure consists of bucket wheel, forearm frame, column tower, balance frame and pull rod, etc. All components connected with each other basically by welding. And the integral structure can realize whole luffing motion and turning motion. Reclaiming arm, central bracket and pitch steel structure of counterweight arm are the structure of its core. This paper use ANSYS to create the simplified finite element model of the steel structure and analyze the distribution of loads in all types of conditions. Loading solving, then cloud picture of displacement and that of stress of the overall luffing mechanism was concluded, so as to check the carrying capacity and strength of the structure.

Numerical Analysis of Vehicle Occupant Responses during Rear Impact Using a Human Body Model

2014 ◽  
Vol 566 ◽  
pp. 480-485 ◽  
Author(s):  
Jonas A. Pramudita ◽  
Shunsuke Kikuchi ◽  
Yuji Tanabe
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Finite Element Model ◽  
Real World ◽  
Element Model ◽  
Vehicle Occupant ◽  
Body Model ◽  
Rear Impact ◽  
Multi Body ◽  
Impact Simulations

Understanding vehicle occupant responses during real-world rear collision accidents is very important in the development of appropriate safety technologies for neck injury lessening. In this study, numerical analysis of vehicle occupant responses during rear impact were conducted by using a human multi-body model, a seat finite element model and crash accelerations obtained from real-world accidents. The human multi-body model was developed based on the body characteristics of a typical Japanese male, including the outer body geometry, inertial properties of body segments and passive joint characteristics. The seat finite element model was extracted from a detailed car finite element model. A small modification was done to the seat model to deal with the rear impact simulations. The crash accelerations were obtained from the drive recorder database of rear collision accidents occurred in Japan. Several crash accelerations were selected and used as input conditions during the rear impact simulations. Kinematic responses of the occupants during the accidents can be reasonably predicted by the simulations. Furthermore, different level of accelerations leads to different kinematics responses that may cause variation in injury occurrence and injury severity.

Spatial-Beam Large-Deflection Equations and Pseudo-Rigid-Body Model for Axisymmetric Cantilever Beams

2011 ◽  
Author(s):  
Issa A. Ramirez ◽  
Craig P. Lusk
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rigid Body ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Analysis Model ◽  
Element Analysis ◽  
Body Model ◽  
Straight Beam ◽  
Rigid Body Model

The kinematic equations for approximating the deflection of a three-dimensional cantilever beam were developed. The numerical equations were validated with a Finite Element Analysis program. With these equations, a pseudo-rigid-body model (PRBM) for an axisymmetric straight beam was developed. The axisymmetric PRBM consists of a spherical joint connecting two rigid links. The location of the deformed end of the beam is determined by two angles and the characteristic radius factor. The angle of the beam with respect to the vertical axis depends on the direction of the force with respect to the undeformed coordinate system. The Pearson’s correlation coefficient for the Finite Element Analysis model and the numerical integration is 0.952.

Transient Dynamics Analysis on Main Shaft of Wind Turbine

2013 ◽  
Author(s):  
Jie Chen ◽  
Dongxiang Jiang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Early Time ◽  
Element Model ◽  
Operating Conditions ◽  
Transient Dynamics ◽  
Dynamics Analysis ◽  
Main Shaft ◽  
Fault Type

Wind turbine operates in harsh environment so that wind turbine breaks down frequently. As the altering loads on wind turbine are complicated, finding abnormity through the parameters of performance is difficult to achieve. How to find the faults of wind turbine in early time effectively is a practical problem confronted by researchers. In this paper, the method for detecting and distinguishing several faults of wind turbine using transient dynamics analysis on main shaft of wind turbine is presented. Firstly, a finite element model of wind turbine is established. Secondly, loads on blades and rotor of the model would be calculated using GH Bladed. Thirdly, transient dynamics analysis is carried out based on the finite element model, using the loads mentioned above. As the displacements of the shaft vary with the operating conditions, we can get the characters of the different faults of wind turbine through the vibration, and even judge the fault type of the wind turbine. Perhaps this method could be a practical way to detect the abnormity of wind turbine and prevent it from failing.

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