Kinematic Analysis of Complex Mechanisms Using SAM
Kinematic analysis of mechanisms using SAM software tools is essential in machine engineering. Designing machines and mechanisms starts by considering kinematics to investigate motion dependencies. This process involves synthesis and analysis phases, using tools like SAM, SolidWorks, and Autodesk Inventor for efficient movement analysis and force evaluation. SAM, developed by the Dutch company Artas, offers benefits such as visualization in a virtual environment and fast data processing for dynamic analysis.
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KINEMATIC ANALYSIS OF COMPLEX MECHANISM USING SAM Djordje Jovanovi , Mladen Krsti , Branislav Milenkovi 3 Msc, Djordje Jovanovi , Mathematical Institute of the Serbian Academy of Sciences and Arts, Belgrade, Serbia, dj.jovanovic@mi.sanu.ac.rs Msc, Mladen Krsti , Faculty of Mechanical and Civil Engineering, Kraljevo, Serbia, mladenkrstic994@gmail.com 3 Msc, Branislav Milenkovi , Mathematical Institute of the Serbian Academy of Sciences and Arts, Belgrade, Serbia, bmilenkovic@mi.sanu.ac.rs
Introduction Assembly and analysis of mechanisms is an essential task in machine engineering Kinematic analysis of mechanisms SAM software tool
Mechanisms have become a part of our life and they help us do our work more easily and comfortably The design of a machine, a mechanism or any moving mechanical system in general always starts with a consideration of kinematics The goal of the kinematic analysis is to investigate the motion of individual components of a mechanism (or its chosen points) in dependence to the motion of drivers The process of projecting a mechanism can essentially be broken down into two phases: syntesis and analysis
Software Tools After the requirements specifications are made, the first step in projecting is also comprised of synthesis, during which an engineer tries to find the exact mechanism and its dimension that will fit the specifications After the mechanism has been designed, the next step is to analyze its movement and forces that affect it SolidWorks, MechDesigner, SAM, Autodesk Inventor, GIM, Pro/Engineer
Benefits of using software tools: visualization of the mechanism motion in virtual environment with its details fast data processing and fast output data acquirement for variable combination of input values possibility to use the output data for other applications the chance for direct transmission to dynamic analysis ability of components impact determination in virtual background
SAM made by the Dutch company Artas SAM is an interactive software tool used for mechanism projecting, analysis (in particular movement and power analysis) and optimization Mechanisms can be generated by projecting them from scratch, or by utilizing available basic components, such as: links, sliders, springs and gears.
Once the mechanism has been constructed and the inputs have been defined, the following kinematic quantities can be calculated: nodal position, displacement, velocity, acceleration angles, angular velocity and acceleration Furthermore, SAM can perform force-analysis, thus enabling the calculation of: driving torque driving force internal forces in elements reaction forces in bearings required or transmitted power
Example In order to demonstrate the workings of SAM 7.0 software tool, an analysis of the following characteristics: _2=5 s^(-1),F=10 kN,M=10kNm has been provided In figure provided in the next slide, a mechanism consisting of 4 links, 2 sliders and 3 fixed supports. Slider 3 moves over link 4, while slider 5 over link 5 The task here is to find values for velocity and acceleration of characteristic points The variables to be determined are velocity and acceleration of points 2, 3, and 5
Comparison of analytical and numeric values Analytical Numerical (SAM) Absolute velocity and acceleration Absolute velocity of point 2 0.20 0.20 Absolute velocity of point 3 0.14 0.10 Absolute velocity of point 5 0.13 0.10 Absolute acceleration of point 2 3.5 3.5 Absolute acceleration of point 3 25.4 26.8 Absolute acceleration of point 5 16.8 18.1
Conclusions This paper present an example of application of software and its modules for kinematic analysis The use of such specialized numeric software tools is becoming more frequent after kinematic analysis, it is necessary to carry out kinetostatic and dynamic analysis for realistic systems, especially for those where velocities, accelerations and masses of system members are significant, as well as for a system that exerts significant forces on executive and transmitting members, e.g. in manufacturing machines for deformation technology, etc.
