ideal constraint

基本解释

The simplest instance is ideal load of bilateral constraints, which means that there is only ideal constraint force during load.
变结构系统理想化处理的方法之一，是把变结构问题看成约束的加载或解除，其中最简单的情况是双面约束的理想加载。
By comparison, the slope deflection equation with non-ideal constraint is more general and the old equations with ideal constraints is a special example of this new equation.
通过比较表明，该方程更具一般性，两端理想约束下的转角位移方程可视为其特例。
The mathematics model of joint friction in a mechanical system was presented, in which the action forces in the joint were converted into ideal constraint force and friction moment.
建立了机构运动副摩擦的数学模型，将关节接触面间的作用力转化为理想约束力与摩擦力矩。

I gotta put that constraint in there for an ideal gas.
注意只适用。
麻省理工公开课 - 热力学与动力学课程节选