摘要
给出了直管在轴向和横向振动的传递矩阵,给出弯曲管道离散模型的节点传递矩阵,推导了在直管与弯管过渡区域的无因次化矩阵。分别计算了末端自由和固定2种边界条件下的输流弯曲管道模态,并与有限元方法计算结果相比较。结果表明,传递矩阵法能有效计算输流管道系统模态,同时流固耦合作用对输流管路模态影响较大,计算时不容忽视。
Firstly,the transfer matrix of straight pipe vibrating in axial and transverse direction were given respectively in this paper;Then,the node transfer matrix of curved pipe discrete model was derived.In addition,dimensionless matrix in the transition region of those two types of pipe were put forward.Based on the transfer matrix method mensioned above,the mode of fluid-conveying curved pipe under conditions of free and fixed boundary at the end of pipe were computed.what is more,the result was compared with that of FEM.The results show that,the mode of fluid-conveying pipe can be effectively computed by the transfer matrix,while the fluid-solid coupling has a great impact on the mode of fluid-conveying pipe,therefore it can not be ignored in calculation.
出处
《舰船科学技术》
2011年第4期30-34,54,共6页
Ship Science and Technology
关键词
输流弯管
传递矩阵
模态分析
pipe conveying fluid
transfer matrix
modal analysis
