vertical dynamic load meaning in English

垂直动载荷

Study on road roughness recognition based on analysis of wheel vertical dynamic load
基于车轮垂直动载的路面不平度识别研究
Under vertical dynamic loading , the max deflection value will decrease with the loading time diminishing and also that of the stress of asphalt pavement
路面最大弯沉值与路面内各计算点的应力最大值出现时间不同，应力在载荷消失后立即达到最大值或延迟时间非常扳，而弯沉最大值延迟时间相对较长。