说明：  使用此子程序定义非均匀的分布式机械负载（压力和体力）。 当负载是时间和/或位置的复杂函数时，通常使用用户子程序DLOAD。 通常可以用* AMPLITUDE选项建模简单的时间函数。 子程序也可以用来定义一个随元素号和/或积分点数而变化的负载。
(This subroutine is used to define non-uniform distributed mechanical loads (pressure and physical force). When the load is a complex function of time and/or location, the user subroutine DLOAD is usually used. A simple time function can usually be modeled with the * AMPLITUDE option. Subprograms can also be used to define a load that varies with the number of elements and/or points of integration.)