Evaluate The Strength Of The Truck Frame Using Multibody Dynamic System And Finite Element Method.pdf

EVALUATE THE STRENGTH OF THE TRUCK FRAME USING MULTIBODY DYNAMIC SYSTEM AND FINITE ELEMENT METHOD Presenter: Nguyen Duy Quang Huy Lecturer: Ngo Van He... This research proposes a method

EVALUATE THE STRENGTH OF THE TRUCK FRAME USING MULTIBODY DYNAMIC SYSTEM AND FINITE

ELEMENT METHOD

Presenter: Nguyen Duy Quang Huy

Lecturer: Ngo Van He

The need for transportation increases with the

development of the economy Even though the

transportation infrastructure has improved

significantly in recent years in Vietnam, trucks still have to operate on badly and decreasing quality roads which can affect the strength and durability

of the vehicles

This research proposes a method that combined both the multibody dynamic system method and the finite element method to evaluate the strength of the truck frame.

Outline 01

Assessment Conclusion

Objectives

0

1

Building a multi-body

dynamics model for

trucks and evaluating the

frame durability in real

operating conditions

using combined

simulation methods.

Aim

02 Research method The finite element method

Multi-body system

Co-simulation

WHAT IS FEM ?

FEM uses math to break complex systems into smaller, simpler pieces, or “elements.” It then applies differential equations to each element individually, using the power of computers to divide, then conquer engineering problems

Multi-body system

A multi-body system (MBS) refers to a mechanical system composed of interconnected rigid or flexible bodies These bodies can have various degrees of freedom and may interact with each other through joints, contacts, or other constraints

Multi-body systems are used to model and analyze the motion, forces, and dynamics of complex

mechanical systems such as vehicles, robots,

machinery, and biomechanical systems

03 Building simulation model

3.1 Building 3D model

Truck frame model 3D truck model

3.2 Finite element model

Simplification of geometry and meshing, creating flexible body.

3.3 Multi-body dynamic for

truck

Suspension system

Wheel and tire

Drivetrain Hydraulic shock Leaf springs

MBD truck model

04 EVALUATE THE STRENGTH OF THE TRUCK FRAME

4.1 Assessment of frame durability under constant radius cornering conditions

4.2 Assessment of frame durability during off-road driving conditions.

4.1 Assessment of frame durability under constant radius cornering conditions

4.1 Assessment of frame durability under constant radius

cornering conditions Input

conditions

Initial velocity 20 km/h

Turning direction Left

Stress distribution at time

t = 40 s

4.1 Assessment of frame durability under constant radius

The vehicle operates stably during turning, with the material's limits ensuring

durability.

4.2 Assessment of frame durability during off-road driving

fatigue-Vehicle oscillation is mainly caused

by road surface irregularities

Surveying the durability of the frame while driving on roads to detect hazardous areas for structural

adjustments.

Simulating a vehicle on a lift table Stress distribution at time

t = 6.31 s

Increasing thickness at concentrated locations or reinforcing connection points (stiffening ribs).

05 Conclusion

● The study has successfully developed a medium-sized truck model and applied a combined approach of finite element modeling and dynamics to test the frame.

● Suggesting improvement options for the frame to enhance durability.

● Using the results as boundary conditions to conduct fatigue analysis

● Integrating with other software to diversify problem-solving approaches.