Analisis de La Susmpension Con Adams

8/10/2019 Analisis de La Susmpension Con Adams

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Suspension Analysis using MSC Adams

The analysis of the suspension characteristics of the DICV NR-XIII was carried out on MSC

Adams to verify the expected behaviour of the car according to the design. The accuracy of

this analysis was validated using Lotus Shark.

Process flow of analysis on MSC Adams:

Obtain

Template

Download of template from MSC Knowledge base

Obtaining database: fsae_2008r1_MDR3.cdb

Opening

Database

Addition of obtained database to current session

Front

Suspensio

n

The front suspension assembly is loaded from the database

Disabling of anti roll bar aspect of assembly

Hard

points

Setting of origin

Adjusting of hardpoints from the table view

Setting

Suspensio

n

parameter

s

Wheel base: 1600 mm Sprung mass: 270 kg

Wheel mass: 10 kg

Brake ratio: 65%

Drive Ratio: 100%

Setting

toe and

camber

Camber: -1 degrees

Toe: 0 degrees


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The above process is repeated for the rear suspension and the graphs are obtained.

Spring

Plot Spring characteristic curve

Set preload

Tire Data

Enter tire stiffness and unloaded radius

Alternatively load property file

Parallel

WheelTravelAnalysis

Setting up analysis parameters

Bump: 27 mm

Rebound: 27mm

AnimationVerification of expected behaviour

Post

processin

g

Loading of required analysis log files

Creating plots

Plots

Loading of Plot configuratin file from shared directory

Interpretation of obtained graphs


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Front Suspension:

Model Created (MSC Adams):

Isometric Front View

Front View


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Hard points Table:

Suspension Parameters:


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Animation of Simulation:

Analysis Parameters:


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Graphs Obtained:

Camber vs Wheel travel:


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Toe angle vs Wheel Travel:


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Caster vs Wheel Travel:


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Validation (Lotus Shark):

Model:

Graphs:

Camber vs Wheel Travel:


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Toe Angle vs Wheel Travel:

Caster vs Wheel Travel:


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Rear Suspension

Model Created (MSC Adams):

Front isometric view

Front view


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Hardpoints Table:

Suspension Parameters:


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Animation of Simulation:

Analysis Parameters:


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Graphs Obtained:

Camber vs Wheel Travel:


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Toe angle vs Wheel Travel:


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Validation (Lotus Shark):

Model:


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Graphs:

Camber vs Wheel travel:

Toe Angle vs Wheel Travel:


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Comment on Graphs obtained:

Parallel wheel travel analysis was performed on the front and rear suspension for

three values of brake ratios : 55 60 65. As expected, brake ratio did not affect the variation

of the suspension characteristics, witnessed by the overlapping graphs obtained.

The suspension behaves as expected and meets the expectations set during the

design stage. Thus the design can be promoted to the manufacturing stage.

Conclusion:

Parallel wheel travel analysis was done for the proposed design on MSC Adams using

the bump and rebound values for which the suspension is designed. The accuracy of this

analysis was validated by performing the same on Lotus Shark. The above designs for the

front and rear suspensions meet the design criteria and can be incorporated into the final

vehicle.

Credits:

Dayasagar

Jim Harris

Rakshith

Prajwal MP

Documents

Analisis de La Susmpension Con Adams