In structural mechanics, forces and moments are graphically represented by arrows. For a force, which is vector (https://hosting243536.ae9a8.netcup.net/scalar-vector-and-matrix/), a straight single arrow is used to depict it, pointing in the direction the force is acting. For moments, there are two representations commonly used. The most common is...
In mathematics, all values can be represented by either a scalar, a vector or a matrix. A scalar is a quantity which is fully defined by a magnitude. In engineering, examples of scalars include mass (https://hosting243536.ae9a8.netcup.net/mass-and-weight/), energy and time. A vector is a quantity which is fully...
The right hand rule is applied to define the orientation of axes and the positive direction for rotations in a coordinate system (https://hosting243536.ae9a8.netcup.net/coordinate-systems/). Firstly, the right hand rule is used to define the directions of a right handed coordinate system, which is exclusively used in engineering....
In FEA, different coordinate systems (COS) are used depending on the application. The global COS in FEA is always the Cartesian (https://hosting243536.ae9a8.netcup.net/coordinate-systems/) COS, as all matrix calculations (stiffness, mass and damping) are done using this system. A local COS can then be used when it is advantageous....
Coordinate systems (COS) are used as a method of defining the position of a point in space. In order to create a coordinate system, an origin location and the axis directions are required. In three-dimensional space, there are the following coordinate systems: Cartesian, with the axes...
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In acoustics (https://hosting243536.ae9a8.netcup.net/acoustics/), transmission loss is defined as the ratio between the power send and power received. In physical tests this is typically performed by having a sender room and a receiver room, with the item being tested (for example a door) installed between the...
There are different types of acoustic analysis, and these depend on what is required from the analysis: Static Acoustics, Harmonic Acoustics, Modal Acoustics. Harmonic Acoustics is used when loads are available, or results are required in the frequency domain. This is typically the case for analyses...
In FEA there are many ways to model acoustics, depending on the problem and the specific requirements of the analysis. The most detailed way is to model the whole acoustic domain in FEA, which means that the object as well as the fluid it is operating...
Acoustics is the study of mechanical waves in fluids and solids. Examples of acoustic waves are: Vibration (below human hearing range) Sound (in human hearing range) Ultrasound (above human hearing range) Acoustic analyses can either be used to determine how mechanical waves change through a structure...