用动力接触有限元法对带间隙支座的管系非线性动力响应进行分析。将此非线性问题分成未碰和已碰两个阶段来处理 ,各阶段分别对应两个不同动力特性的线性系统。在未碰阶段管道尚未与支座接触而能在间隙中自由运动 ,当满足用位移表示的动力接触条件时 ,管道碰到支座 ,进入已碰阶段。在已碰期间支座被简化为弹性杆元 ,通过杆元中内力的符号变化来判断管道何时脱离支座 ,再回到未碰阶段。管道与支座的碰撞激发出系统的高阶振型 ,导致系统能量由低阶模态向高阶模态转移。给出了不同间隙对管系动力响应影响的算例 The dynamic contact nonlinear finite element method is used to analyze the nonlinear dynamic response of the pipe system with gap bearing. This non-linear problem is divided into two stages, untouched and touched. Each stage corresponds to two linear systems with different dynamic characteristics. In the non-touch stage pipe has not yet contact with the support and can move freely in the gap, when the displacement to meet the conditions of dynamic contact, the pipe hit the support, into the touch stage. The abutment is simplified as a flexible rod element during the touch and the sign of the internal force in the rod element is used to determine when the tube has been released from the abutment and returned to the non-touch phase. The collisions between the pipe and the support excite the high modes of the system, resulting in the transfer of system energy from the low-order mode to the high-order mode. An example of the effect of different clearances on the dynamic response of the pipe system is given