The calculation method of cg of locomotive is depicted. Then it is introduced how to determine and obtain secondary sprung cg,bogie mass cg and actual locomotive cg by four pivot point method.

• 阐述了机车重心的计算方法 ,介绍了如何采用四支点法测定和求得簧上总成重心、转向架总质量重心以及机车的实际重心。