摘要
根据弱约束化工管路由于阀门的启闭动作而产生的水击现象,引起系统较为复杂的传输特征,考虑泊松耦合效应与连接耦合效应,推导了耦合振动特性方程,采用多变量拟线性方程组特征线法求解阀门启闭产生的水击耦合瞬态响应。结果指出,容腔的压力响应幅值变化范围较大,阀门启闭动作结束后,仍存在有较大的振动幅值。通过试验验证阀口端压力峰值的测试结果与计算结果偏差为2.25%,与计算结果趋势基本一致,验证了所建立耦合振动瞬态特性方程的有效性。
Weak constraints in a chemical piping system engender a water hammer nonlinear vibration phenomena due to the hydraulic control valve open-shut moves, which induces the complex transmission characteristics of the system. We established coupling axial vibration characteristics equations considering Poisson and junction coupling, using the joint method to treat the coupling boundary condition. Characteristics method is applied to solve multi-variable linear equations for obtaining coupled transient response of water hammer owing to valve open-shut operation. Results shows that the amplitude of pressure response in chamber changes within a large range, and that a greater pressure still oscillates after the ending of valve open-shut action. The calculated pressure oscillation of the valve port is verified through experiment, and the deviation of pressure peak is found to be about 2. 25%. The pressure trend is consistent with the calculation results, showing that the coupling vibration model is effective.
出处
《机械科学与技术》
CSCD
北大核心
2010年第3期312-317,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
重庆市教委科技项目(KJ090704
KJZH08212)资助
关键词
化工管路系统
耦合振动
瞬态特性
chemical piping system
coupling vibration
transient characteristics
