MBD Simulation on a Piston Assembly
* images and plots in the doc file attached
Piston Assembly
Aim : To model and assembly piston assembly and subject it to given condition and obtain required plots.
Introduction: Piston motion analysis in the study of the reciprocating motion of the piston in the cylinder and the motion of the assembly. This motion is widely used in all internal combustion vehicle.
this mechanism is used to convert reciprocating motion into rotatory motion.
Parts required are
- Piston head
- Connecting rod
- Gudgeon pin
- End cap
- Crank
Conditions
1 – 0 mm offset
2 – 10 mm offset (positive)
3 – 10 mm offset (negative)
Parts required
Piston Head
It is the part the undergoes reciprocating motion, and slides in the cylinder. It has hole for gudgeon pin and slots for piston rings
Gudgeon Pin
It is required to mate the connecting rod to piston.
Connecting Rod
it is the part that undergoes to and fro motion and helps in connecting piston to crank shaft
End Cap
It is used to fixate connecting rod and crankshaft
Crank
Is responsible for the conversion of reciprocating motion into rotatory motion and has a connection for drive shaft
Procedure -
Create above mentioned 3D parts using the dimensions mentioned
Use assembly mode to assemble the part
Float the first part
Apply the required constraints ( in 3 conditions specified )
Simulate at 2000 RPM and 3600 frames per second
Condition 1 ( 0 mm Offset )
Condition 2 ( 10 mm Offset ) (positive)
Condition 3 ( 10 mm Offset ) (negative)
Plots
For center axis
For +ve offset of 10 mm
For -ve offset of 10 mm
Super imposed graph
Observation -
the linear displacement is smooth in all 3 cases
All 3 cases have a slight delay in phases as position of crank is different
The center position has the highest displacement of 307 mm to 302 mm of the offsets
both offset has same value for the displacement , but different values of speed at TDC
Piston Assembly
Aim : To model and assembly piston assembly and subject it to given condition and obtain required plots.
Introduction: Piston motion analysis in the study of the reciprocating motion of the piston in the cylinder and the motion of the assembly. This motion is widely used in all internal combustion vehicle.
this mechanism is used to convert reciprocating motion into rotatory motion.
Parts required are
- Piston head
- Connecting rod
- Gudgeon pin
- End cap
- Crank
Conditions
1 – 0 mm offset
2 – 10 mm offset (positive)
3 – 10 mm offset (negative)
Parts required
Piston Head
It is the part the undergoes reciprocating motion, and slides in the cylinder. It has hole for gudgeon pin and slots for piston rings
Gudgeon Pin
It is required to mate the connecting rod to piston.
Connecting Rod
it is the part that undergoes to and fro motion and helps in connecting piston to crank shaft
End Cap
It is used to fixate connecting rod and crankshaft
Crank
Is responsible for the conversion of reciprocating motion into rotatory motion and has a connection for drive shaft
Procedure -
Create above mentioned 3D parts using the dimensions mentioned
Use assembly mode to assemble the part
Float the first part
Apply the required constraints ( in 3 conditions specified )
Simulate at 2000 RPM and 3600 frames per second
Condition 1 ( 0 mm Offset )
Condition 2 ( 10 mm Offset ) (positive)
Condition 3 ( 10 mm Offset ) (negative)
Plots
For center axis
For +ve offset of 10 mm
For -ve offset of 10 mm
Super imposed graph
Observation -
the linear displacement is smooth in all 3 cases
All 3 cases have a slight delay in phases as position of crank is different
The center position has the highest displacement of 307 mm to 302 mm of the offsets
both offset has same value for the displacement , but different values of speed at TDC