But for the continuous jet which velocity gradient is not linear, it has not only one virtual origin.
但对于非线性速度分布的连续射流，存在的虚拟原点不是唯一的。
The radius variation of the jet in the motion process is deduced based on the virtual origin concept.
基于虚拟原点概念推导了运动过程中射流径向尺寸变化规律。
The classical penetration equation based on the virtual origin theory can well describe the penetration behaviour of the continuous jet with linear velocity distribution.
对于沿射流长度方向具有线性分布速度的连续射流，经典的基于虚拟原点理论的射流侵彻关系式能很好的描述其侵彻行为。
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