摘要
为研究船用复杂管路系统的抗冲击性能,以推进柴油机海水冷却管路系统为研究对象,建立完整的管路模型,包括对管路附件、连接设备及支、吊架的模拟。为分析管内液体对管系抗冲击性能的影响,采用折算流体体积法和考虑流固耦合的ALE算法进行计算对比,得出液体影响折算系数。研究结果表明:计算时应根据管径对液体的影响系数进行折减;管路系统在弯头与三通处易产生塑性变形;垂向冲击载荷作用下垂直弯头的响应远大于水平弯头。
In order to study the shock resistance of complicated marine piping systems, this paper takes the seawater cooling piping system of propulsion diesel engines as a research object and constructs a complete pipeline model, including the simulation of piping accessories, connecting devices, supports and hangers. To further analyze the influences of the fluid within on the shock resistance of the overall piping system, the discounted fluid volume method as well as the ALE algorithm that focuses on fluid-structure interaction are applied, and the obtained results are compared. The conversion coefficient of liquid effects is also derived. The results show that （1） the influences of pipe diameters on the fluid is not negligible and must be calculated, （2） the piping system is vulnerable to plastic deformation in the elbow and tee-junction regions, （3） the response of vertical elbows under vertical load impacts is much stronger than that of horizontal elbows.
出处
《中国舰船研究》
2013年第4期68-73,共6页
Chinese Journal of Ship Research
基金
国家部委基金资助项目
关键词
管路
冲击响应
管路吊架
附加质量
piping
shock resistance
piping hanger
added mass
