What is Dynamic Analysis?
Dynamic stress can be obtained from experiment (sensor or mounting sensor on a physical component) or simulation. Using simulation, a representative load history including inertial forces and external forces (e.g. joint reaction forces and torques) must first be generated for accurate dynamic stress calculation. Multiple body dynamic analysis methods (discussed in Chapter 3), typically used for dynamic motion analysis, can be used for dynamic load analysis of mechanical systems. All bodies of the dynamic model are generally assumed to be rigid. The rigid body assumption for suspension components of a vehicle often yields reasonably accurate analysis results to support structural design for durability.
What is Finite Element Analysis?
Finite element analysis (FEA) is an analysis method that measures and concludes how a product or a system will react in physical conditions such as force, impact, vibration, shock wave, heat resistance, fluid flow under current life conditions. Finite element analysis shows whether the product is broken, worn, or working as designed. This method is one of the key processes in the product development process.
FEA works by dividing a real object into a large number (hundreds of thousands) of finite elements (meshes) such as small cubes, prisms. This method examines the state of each mesh structure under physical conditions through mathematical equations. A higher mathematical equation examines all these mesh structures holistically. Finite element analysis helps predict the behavior of products affected by many physical effects, including:
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Mechanical stress
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Mechanical vibration
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Tiredness
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Movement
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Heat transfer
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Liquid flow
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Electrostatic
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Plastic injection molding
Advantages
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At its most fundamental, it is a digital test method. Before physically producing the parts, they can be examined virtually in a computer environment.
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Since the possible problems are displayed in the computer environment, the arrangements are revised in the design and important steps are taken to make a smooth design
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Good visualization of structural behavior and failure under various loading conditions
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Gain insight into critical design parameters (Weight, Power, Cost)
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Faster and cheaper design cycle
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Weight reduction, topology optimization, metal replacement material changes can be done with the finite element method and faster, more effective and economical methods.