Multi-Body Dynamic Simulation of the Meniscus in a Computational Knee Model

2008 ◽  
Author(s):  
Mohammad Kia ◽  
Trent M. Guess
Keyword(s):  
Articular Cartilage ◽  
Dynamic Simulation ◽  
Contact Forces ◽  
Joint Stability ◽  
Human Knee ◽  
Articular Surfaces ◽  
Joint Lubrication ◽  
Multi Body ◽  
Computational Knee Model ◽  
Body Dynamic

The menisci have an important multifunctional role in the human knee. They protect the joint articular cartilage (by acting as a buffer between femoral and tibial surfaces while loading), provide joint lubrication, and increase joint stability (by providing congruity between femoral and tibial articular surfaces) [1]. The menisci also effectively distribute contact forces over the articular surfaces by increasing the contact surface of the joint [2].

The Rigid-Flexible Coupled Modeling and Dynamic Simulation of HP-20 Robot

2011 ◽  
Vol 101-102 ◽  
pp. 508-511
Author(s):  
Gang Zhang ◽  
Hai Bo Huang ◽  
Ting Zhang
Keyword(s):  
Modal Analysis ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Dynamic Optimization ◽  
3D Modeling ◽  
Coupled Modeling ◽  
Structural Dynamic ◽  
Modeling Software ◽  
Multi Body ◽  
Body Dynamic

The rigid-flex coupled multi-body dynamic model of Motoman HP20 was built in this paper. The parts geometry shapes were modeled in 3D modeling software and imported into the multi-body platform. Then the joints were added to the parts. The arms were analyzed in FE software and modal neutral files were obtained. Then rigid parts were replaced by the modal neutral files. Driven curves of each arm joint were obtained by D-H method. The modal analysis of system was also made to analyze the robot dynamic characters. The results give some suggestions for robot motor selection and structural dynamic optimization.

A Study of Engine Mount Optimisation of Three-Cylinder Engine through Multi-Body Dynamic Simulation and Its Verification by Vehicle Measurement

2015 ◽  
Author(s):  
Prince Shital ◽  
Chiranjit Ghosh ◽  
Harveen Talwar ◽  
Avnish Gosain ◽  
Praneet Shanker Dayal
Keyword(s):  
Dynamic Simulation ◽  
Engine Mount ◽  
Multi Body ◽  
Body Dynamic

Injury to the Glenohumeral Capsule During Anterior Dislocation Leads to Higher Joint Contact Forces During Simulated Clinical Exams

2011 ◽  
Author(s):  
Carrie A. Voycheck ◽  
Daniel P. Browe ◽  
Patrick J. McMahon ◽  
Richard E. Debski
Keyword(s):  
Glenohumeral Joint ◽  
External Rotation ◽  
Permanent Deformation ◽  
Supraspinatus Tendon ◽  
Contact Forces ◽  
Anterior Dislocation ◽  
Joint Stability ◽  
Articular Surfaces ◽  
Increased Risk ◽  
Glenohumeral Capsule

Glenohumeral joint stability is maintained by a combination of active and passive soft tissue structures and osteoarticular contact. Anatomical structures that contribute to each of these categories include the rotator cuff muscles, the glenohumeral capsule, and the contact between the articular surfaces of the humeral head and glenoid of the scapula, respectively. Dislocation may result in injury to one or more of these stabilizing components requiring the other structures to account for the deficit. For example, previous research has shown that a torn supraspinatus tendon results in increased bony contact forces during glenohumeral abduction. [1] Another common injury resulting from dislocation is permanent deformation of the glenohumeral capsule as the capsule is the primary static restraint to anterior translation in positions of external rotation. [2] Increased joint translations and rotations usually occur following permanent deformation [3] indicating a loss in joint stability provided by the capsule. These changes in joint kinematics following dislocation imply that differences in the contact forces between the humerus and scapula may exist as well. Irregular contact between two articular surfaces can lead to abnormal wear and an increased risk of osteoarthritis when left untreated. Therefore, the objective of this work was to assess the affect of anterior dislocation on glenohumeral joint stability by determining the in situ force in the glenohumeral capsule and the bony contact forces between the humerus and scapula during a simulated clinical exam at three joint positions in the intact and injured joint.

Analysis and optimization for contact forces and transmission efficiency of an automotive ball joint

2020 ◽  
Vol 234 (14) ◽  
pp. 3207-3223
Author(s):  
Huayuan Feng ◽  
Zhihong Yin ◽  
Wen-Bin Shangguan ◽  
Xihua Li ◽  
Yong Luo
Keyword(s):  
Sensitivity Analysis ◽  
Friction Coefficient ◽  
Dynamic Model ◽  
Transmission Efficiency ◽  
Contact Forces ◽  
Ball Joint ◽  
Efficiency Loss ◽  
Shaft System ◽  
Multi Body ◽  
Body Dynamic

Contact forces and transmission efficiency of an automotive ball joint constitute important design goals of an automotive drive shaft system, which affect transmission performances of the ball joint and the drive shaft system. In order to analyze contact forces and transmission efficiency more comprehensively, a multi-body dynamic model for calculating contact forces and transmission efficiency of a ball joint is established. The effectiveness of the multi-body dynamic model is validated through experiments of contact forces and transmission efficiency of a ball joint. Based on the developed multi-body dynamic model, influences of the articulation angle, the ball number and the track offset on contact forces between the ball and the cage, and between the ball and the track are analyzed. To enhance the analysis and optimization efficiency of transmission efficiency, a proxy model for the transmission efficiency loss late is established on the basic of the multi-body dynamic model. Influences of the ball radius, the articulation angle, the friction coefficient, the central angle of the cross section of the cage rib, and the contact stiffness and the force exponent of contact pairs on the transmission efficiency loss late are analyzed. Using Sobol’ global sensitivity analysis method, the sensitivity of the proxy model is analyzed and influences of various factors on the transmission efficiency loss late are further determined. According to sensitivity analysis results, the articulation angle, the friction coefficient and the force exponent are selected as design parameters, and the transmission efficiency loss late is optimized through a numerical example.

Analysis of Arc-Shaped Support Plate Influence on Muzzles Vibration of Gatling Gun Fire on Tripod

2013 ◽  
Vol 712-715 ◽  
pp. 1464-1467
Author(s):  
Jia Sheng Li ◽  
Zhen Qiang Liao ◽  
Ming Qiu ◽  
Fei Wang
Keyword(s):  
Dynamic Model ◽  
Dynamic Simulation ◽  
Dynamic Theory ◽  
Support Plate ◽  
Supporting Effect ◽  
Multi Body ◽  
Body Dynamic

To improve the firing stability of Galtling gun by installing an arc-shaped support plate on a light tripod,a firing dynamic model of Gatling gun shooting on light tripod which has a arc-shaped support plate fixed on the different positions established based on rigid-flexible multi-body dynamic theory. The muzzles vibration and tripods deformation obtained through dynamic simulation. The results show that while the arc-shaped support plate fixed close to the bracket, the supporting effect to Galting gun decreased, tripods deformation and muzzles vibration increased. On the contrary, it reduced muzzles vibration and enhanced the firing stability. The analytic results provide a reference to improve the arc-shaped support plate in tripod.

Dynamic Simulation of a Motor Vehicle in Virtual Prototyping Environment

2014 ◽  
Vol 555 ◽  
pp. 369-374
Author(s):  
Vlad Totu ◽  
Cătălin Alexandru
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Dynamic Behaviour ◽  
Motor Vehicle ◽  
Virtual Prototyping ◽  
Virtual Prototype ◽  
Contact Forces ◽  
Rear Suspension ◽  
Systems Software ◽  
Multi Body

In this paper, we attempt to carry out the dynamic analysis of a motor vehicle, using the virtual prototype developed with the MBS (Multi-Body Systems) software ADAMS. The virtual prototype includes the front and the rear suspension subsystems, the steering subsystem, and the car body subsystem. The experiment designed is one frequently carried by the automotive manufacturers, namely passing over bumps. The connection between wheels (tires) and road (ground) is made using contact forces, which allow modelling how adjacent bodies interact with one another when they collide during the simulation. On the virtual prototype, several measurements have been realized having in view to evaluate the dynamic behaviour of the vehicle.

Multi-Body Dynamic Simulation and Experimental Validation of Valve Spring Surge Speed

2013 ◽  
Author(s):  
R S Prabakar ◽  
Arpan Nagar ◽  
Maruthi patil ◽  
Umashankar N ◽  
Sathya Prasad Mangalaramanan PhD
Keyword(s):  
Dynamic Simulation ◽  
Experimental Validation ◽  
Valve Spring ◽  
Multi Body ◽  
Body Dynamic
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