Elasto-Multibody Dynamic Simulation of Impact Induced High Frequency Vehicular Driveline Vibrations

2003 ◽  
Author(s):  
M. Gnanakumarr ◽  
S. Theodossiades ◽  
H. Rahnejat ◽  
M. Menday
Keyword(s):  
High Frequency ◽  
Impact Testing ◽  
Vibration Monitoring ◽  
Vibrational Response ◽  
Multibody Dynamic ◽  
High Contribution ◽  
Noise Vibration ◽  
Experimental Values ◽  
Multi Body ◽  
Body Dynamic

This paper investigates an NVH (Noise, Vibration and Harshness) phenomenon, which occurs as a load reversal in the presence of lashes in the driveline and is known in industry as clonk. A combined study of rigid multi-body dynamic analysis and flexible body oscillations, using super-element FEA techniques is being deployed. The results show high contribution in the driveline vibrational response of certain structural modes of the driveshaft pieces, induced by remote impacting of meshing transmission teeth trough backlash. The predicted spectrum of vibration shows good conformance with previously obtained experimental values, for both impact testing of the driveshaft pieces, as well as those obtained by vibration monitoring of experimental rigs (Vafaei et al, 2001).

Performance Improvement in Steering Torque Simulator With Multibody Vehicle Model

2013 ◽  
Author(s):  
Toshimasa Takouda ◽  
Yoshinori Owaki ◽  
Masashi Tsushima ◽  
Taichi Shiiba
Keyword(s):  
Dynamic Analysis ◽  
Friction Model ◽  
Experimental Result ◽  
Vehicle Model ◽  
Step Size ◽  
Real Time Analysis ◽  
Multibody Dynamic ◽  
Multi Body ◽  
Steering Torque ◽  
Body Dynamic

The aim of this study is to improve the performance of a steering torque simulator with a multibody vehicle model. From the perspective of the calculation speed, the augmented formulation and the penalty method were investigated as the formulation of the multibody dynamic analysis. In this study, the step size of the real-time analysis was shortened by embedding matrix libraries to the multibody dynamic analysis. In addition, the friction characteristics of the steering rack of an actual vehicle was experimentally evaluated in order to enhance the reality of the developed simulator. The friction model was identified on the basis of the experimental result and was applied to the multi-body dynamic analysis. A slalom test was conducted with the developed simulator and was compared with the experiment of an actual vehicle.

scholarly journals Impact-induced vibration in vehicular driveline systems: Theoretical and experimental investigations

2005 ◽  
Vol 219 (1) ◽  
pp. 1-12 ◽  
Author(s):  
M Gnanakumarr ◽  
S Theodossiades ◽  
H Rahnejat ◽  
M Menday
Keyword(s):  
High Frequency ◽  
Experimental Investigations ◽  
Flexible Body ◽  
Experimental Measurements ◽  
Light Truck ◽  
Radiated Noise ◽  
Vibrational Response ◽  
Body Dynamics ◽  
Multi Body

The paper investigates the conditions leading to the emergence and persistence of an acute metallic noise in light-truck drivelines. Sudden demands in torque in the presence of lash zones give rise to this phenomenon, which is onomatopoeically referred to as clonk. The study of clonk requires combined rigid multi-body dynamics and flexible body oscillations. The results show high-frequency contributions in the driveline vibrational response of certain structural modes of the driveshaft pieces, which are induced by remote impact of meshing transmission teeth through backlash. The numerically predicted spectrum of vibration shows good correlation with experimental measurements of radiated noise from a dynamic drivetrain rig.

A Multi-Body Dynamic Model for Analysis of Localized Track Responses in Vicinity of Rail Discontinuities

2016 ◽  
Vol 16 (09) ◽  
pp. 1550058 ◽  
Author(s):  
H. Askarinejad ◽  
M. Dhanasekar
Keyword(s):  
Dynamic Responses ◽  
Railway Track ◽  
Design Parameters ◽  
Valuable Insight ◽  
Modeling And Analysis ◽  
Impact Forces ◽  
Noise Vibration ◽  
Multi Body ◽  
The Impact ◽  
Body Dynamic

Rail discontinuities are one of the main sources of wheel impact causing high levels of noise, vibration and stresses in railway track. Even though various multi-body train–track interaction models have been developed in the past decade, accurate modeling and analysis of the track dynamic behavior in the vicinity of rail discontinuities is rare in the literature. In this paper, formulation of a new explicit multi-body dynamic (MBD) model incorporating detailed wagon, wheel–rail subsystems and track containing a rail discontinuity (rail joint) is reported. The predictions of the localized track responses are validated using the data from two gapped rail joints in the field test. The validated model accurately determines the impact forces and dynamic responses. The simulation results provide valuable insight on the behavior of track in vicinity of a rail discontinuity, the sensitivity of the design parameters to the impact forces and the track dynamic responses currently unavailable in the literature.

Vibration Characteristic Prediction of a Heavy Machinery Suspension Seat Using Multi-Body Dynamic Analysis Method

2008 ◽  
Vol 33-37 ◽  
pp. 1259-1264
Author(s):  
W.C. Lee ◽  
Chae Sil Kim ◽  
H.O. Choi ◽  
Y.G. Jung ◽  
Jung I. Song
Keyword(s):  
Dynamic Analysis ◽  
The Other ◽  
Test Results ◽  
Analysis Method ◽  
Analysis Model ◽  
Heavy Machinery ◽  
Multibody Dynamic ◽  
Dynamic Simulation Model ◽  
Multi Body ◽  
Body Dynamic

This article proposes a novel simulation technique to predict the reasonable dynamic characteristics of a suspension seat for heavy machinery using a commercial multibody dynamic analysis code, ADAMS. The dynamic model is simulated with the specific condition such as sinusoidal and sweep input. The experiment test for actual suspension seat is conducted for reviewing the dynamic simulation model with same input condition. As the simulation results shows good agreements with experimental test results, the dynamic analysis model is reasonable and will be very helpful for predicting the dynamic characteristic for the suspension seat for heavy machinery and for designing the other type seats with the other suspension mechanism types.

Continuous multi-body dynamic analysis of float-over deck installation with rapid load transfer technique in open waters

2021 ◽  
Vol 224 ◽  
pp. 108729
Author(s):  
Shujie Zhao ◽  
Xun Meng ◽  
Huajun Li ◽  
Dejiang Li ◽  
Qiang Fu
Keyword(s):  
Dynamic Analysis ◽  
Load Transfer ◽  
Multi Body ◽  
Body Dynamic

scholarly journals Research on Coupled Dynamic Model of Tracked Vehicles and Its Solving Method

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Yuliang Li ◽  
Chong Tang
Keyword(s):  
Dynamic Performance ◽  
Tractive Force ◽  
Actual Structure ◽  
Discrete Method ◽  
Tracked Vehicles ◽  
Coupled Equations ◽  
Calculation Results ◽  
Dynamic Software ◽  
Multi Body ◽  
Body Dynamic

In order to conveniently analyze the dynamic performance of tracked vehicles, mathematic models are established based on the actual structure of vehicles and terrain mechanics when they are moving on the soft random terrain. A discrete method is adopted to solve the coupled equations to calculate the acceleration of the vehicle’s mass center and tractive force of driving sprocket. Computation results output by the model presented in this paper are compared with results given by the model, which has the same parameters, built in the multi-body dynamic software. It shows that the steady state calculation results are basically consistent, while the model presented in this paper is more convenient to be used in the optimization of structure parameters of tracked vehicles.

Multi-body dynamic analysis of float-over installations

2012 ◽  
Vol 51 ◽  
pp. 1-15 ◽  
Author(s):  
L. Sun ◽  
R. Eatock Taylor ◽  
Y.S. Choo
Keyword(s):  
Dynamic Analysis ◽  
Multi Body ◽  
Body Dynamic

scholarly journals Multi Body Dynamic Equations of Belt Conveyor and the Reasonable Starting Mode

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1489
Author(s):  
Yongbo Guo ◽  
Fansheng Wang
Keyword(s):  
Finite Element ◽  
Recursive Formula ◽  
Conservative System ◽  
Conveyor Belt ◽  
Dynamic Equations ◽  
Lagrange’S Equation ◽  
Rigid Finite Element Method ◽  
Potential Capacity ◽  
Multi Body ◽  
Body Dynamic

Based on the rigid finite element method and multibody dynamics, a discrete model of a flexible conveyor belt considering the material viscoelasticity is established. RFE (rigid finite element) and SDE (spring damping element) are used to describe the rigidity and flexibility of a conveyor belt. The dynamic differential equations of the RFE are derived by using Lagrange’s equation of the second kind of the non-conservative system. The generalized elastic potential capacity and generalized dissipation force of the SDE are considered. The forward recursive formula is used to construct the conveyor belt model. The validity of dynamic equations of conveyor belt is verified by field test. The starting mode of the conveyor is simulated by the model.

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