Hydraumatic and spontaneous bulging of bimetal tube in the case of tube end immovable and tube end unrestricted was studied by utilizing numerical simulation technology.

• 利用数值模拟技术研究了双层管在管端固定和管端自由两种情况下的液压自然胀形,得到了2种情况下的临界液压胀形力和胀形高度、管件长度、管层厚度等的变形规律。