IfcDimensionalExponents
IfcDimensionalExponents
实体定义
注:定义依据ISO/CD 10303-41:1992
任何量的维数都可以表示为基本量的维数的幂的乘积。维度指数实体定义基本量的维度的幂。所有物理量都基于七个基本量(ISO 31(第2条))。
注:长度、质量、时间、电流、热力学温度、物质量和发光强度是七个基本量。
示例2毫米的长度的长度指数为1。其余的指数等于0。
示例2毫米每秒的速度的长度指数为1,时间指数为-1。其余的指数等于0。
注:对应的STEP名称:dimensional_indexters,请参考ISO/IS 10303-41了解正式标准的最终定义。
IFC1.5.1中的新实体。
Attribute inheritance
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
IfcDimensionalExponents | |||||
1 | LengthExponent | INTEGER | [1:1] | The power of the length base quantity. | X |
2 | MassExponent | INTEGER | [1:1] | The power of the mass base quantity. | X |
3 | TimeExponent | INTEGER | [1:1] | The power of the time base quantity. | X |
4 | ElectricCurrentExponent | INTEGER | [1:1] | The power of the electric current base quantity. | X |
5 | ThermodynamicTemperatureExponent | INTEGER | [1:1] | The power of the thermodynamic temperature base quantity. | X |
6 | AmountOfSubstanceExponent | INTEGER | [1:1] | The power of the amount of substance base quantity. | X |
7 | LuminousIntensityExponent | INTEGER | [1:1] | The power of the luminous intensity base quantity. | X |
EXPRESS Specification
ENTITY IfcDimensionalExponents;
LengthExponent : INTEGER;
MassExponent : INTEGER;
TimeExponent : INTEGER;
ElectricCurrentExponent : INTEGER;
ThermodynamicTemperatureExponent : INTEGER;
AmountOfSubstanceExponent : INTEGER;
LuminousIntensityExponent : INTEGER;
END_ENTITY;
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