Tech/ME 140: Unit 5 Lecture
Mechanism Design: Introduction to Mechanisms,
Synthesis Using Graphical Approach. Motion
Analysis and Simulation: Animation and Articulation
Mechanism Defined
• A system of parts working together in a
machine.
• A piece of machinery.
• An assembly of moving parts performing a
complete functional motion, often being
part of a large machine.
• Linkage.
Mechanism Design
Mechanism Design with Labels
Two Ways of Achieving Synthesis
of Mechanism
• Rational Synthesis:
– Consists of standard synthesis techniques developed by
kinematicians.
– These techniques can be automated using computer
programs.
– Limitation is that it is applicable only to some specific types
of mechanisms.
• Informal Synthesis or Iteration:
– Involves a guess of dimensions of mechanism members.
– Then checking the resultant performance by analysis.
– The dimensions are modified to obtain desired results.
SolidWorks Simulation
http://www.youtube.com/watch?feature=play
er_embedded&v=V5nKOTrDw5U
SolidWorks Simulation
• SolidWorks Simulation provides core simulation tools
to test your designs and make the decisions to
improve quality.
• This eliminates the redundant tasks required with
traditional analysis tools.
• Component materials, connections, and relationships
defined during design development are fully
understood for simulation.
• Products can be tested for strength and safety.
SolidWorks Simulation
http://www.solidworks.com/sw/products/simu
lation/simulation.htm
SolidWorks Motion Analysis
• SolidWorks motion analysis uses the assembly
mates along with part contacts and a robust
physics-based solver to accurately determine
the physical movements of an assembly under
load.
• With the assembly motion and forces calculated,
a structural analysis of the components can be
performed to ensure product performance.
SolidWorks Motion Analysis
• Conduct detailed motion analysis and
evaluate the mechanical performance of
your design using:
– CAD-embedded SolidWorks Simulation
– SolidWorks Motion, and
– Finite element analysis (FEA).
SolidWorks Motion Analysis
• A Motion Analysis study combines motion study
elements with mates in motion calculations.
• Motion constraints, material properties, mass,
and component contact are included in the
SolidWorks Motion kinematic solver calculations.
• A Motion Analysis study also calculates loads
that can be used to define load cases for
structural analyses.
SolidWorks Motion Analysis
• You can use Motion Analysis to accurately
simulate and analyze the motion of an
assembly while incorporating the effects of
Motion Study elements such as:
– Forces
– Springs
– Dampers
– Friction
SolidWorks Motion Analysis
• To use the SolidWorks Motion solver in a
motion study, select Motion Analysis
from the motion studies type list in the
MotionManager
Applications of Simulation
Applications of Simulation
SolidWorks SimulationXpress
SolidWorks Motion Study
http://www.youtube.com/watch?v=6BYYn60
9YzY
Steps in SolidWorks Simulation
1. Open Solidworks SimulationXpress
2. Click “Next”
3. Select “Add a fixture”
4. Select fixture location and click
5. Click check mark
6. Click next
7. Click “Add a force”
8. Select entity for force bearing and click
9. Input force amount
10. Click check mark
11. Click next
12. Click “Choose material”
13. Select material and click “Apply”, then “Close”
14. Click next
15. Click “Run simulation”
16. Allow simulation to run for a while, then click “Stop simulation”
17. Check result
18. Repeat as needed until material fails