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2024年4月12日发(作者：字符常量是)
abaqus标准单位
Abaqus is a state-of-the-art finite element analysis (FEA) software
developed by Dassault Systèmes. It is widely used for simulating
and analyzing complex mechanical and structural systems. In order
to obtain accurate and reliable results, it is essential to use proper
units and ensure consistency throughout the analysis. Abaqus
follows the SI (International System of Units) as the standard units
for its calculations.
The SI unit system is centered around seven fundamental base
units: meter (m) for length, kilogram (kg) for mass, second (s) for
time, ampere (A) for electric current, kelvin (K) for temperature,
mole (mol) for amount of substance, and candela (cd) for luminous
intensity.
In Abaqus, it is essential to use consistent units for all input
parameters, including geometry dimensions, material properties,
loads, and boundary conditions. Here, we will discuss how to
specify units for a few commonly used parameters in Abaqus
analysis.
1. Length: The standard unit for the length is meter (m). Ensure
that all geometric dimensions and coordinates are specified in
meters or their decimal submultiples (e.g., millimeter (mm),
centimeter (cm)) as per the convenience of the model.
2. Mass: The standard unit for mass is kilogram (kg). It is
important to specify the mass in terms of kilograms or their
decimal submultiples (e.g., gram (g), milligram (mg)).
3. Time: The standard unit for time is second (s). It is crucial to
express time-related parameters, such as loading rates or time steps,
in seconds or their decimal submultiples (e.g., millisecond (ms),
microsecond (μs)).
4. Force: The standard unit for force is newton (N), which is
defined as kg·m/s². Ensure that all forces, such as loads and
boundary conditions, are specified in Newtons or their decimal
submultiples (e.g., kilonewton (kN), millinewton (mN)).
5. Temperature: The standard unit for temperature is Kelvin (K). It
is important to specify temperature values using the Kelvin scale or
its decimal submultiples (e.g., degree Celsius (°C)) as needed.
6. Pressure: The standard unit for pressure is Pascal (Pa), defined
as N/m². Pressure should be expressed in Pascals or their decimal
submultiples (e.g., kilopascal (kPa), megapascal (MPa)).
7. Density: The standard unit for density is kilogram per cubic
meter (kg/m³). Ensure that all density values are provided in kg/m³
or their decimal submultiples (e.g., gram per cubic centimeter
(g/cm³)).
It is important to note that Abaqus does not perform automatic
conversions between different unit systems. Therefore, it is crucial
to always use the same consistent set of SI units throughout the
analysis. Inconsistencies in units can lead to erroneous results and
may produce unrealistic or inaccurate simulations.
In conclusion, following the SI unit system and ensuring
consistency in units throughout the analysis is crucial when using
Abaqus. Properly specifying units for parameters such as length,
mass, time, force, temperature, pressure, and density is essential
for accurate and reliable finite element simulations. By adhering to
standard units, engineers and researchers can effectively analyze,
validate, and optimize their designs and structures using the
Abaqus software.
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