编织钢丝-橡胶复合弹性管流-固耦合振动与冲击特性仿真分析

FLUID-STRUCTURE COUPLING SIMULATION ANALYSIS OF VIBRATION AND SHOCK CHARACTERISTICS OF STEEL-WIRE-REINFORCED RUBBER PIPE

  • 摘要: 该文提出一种准确模拟编织钢丝-橡胶复合结构弹性管的流-固耦合静、动态特性仿真分析的三维有限元建模和计算方法,通过弹性管拉伸、压缩、弯曲刚度实验及振动模态实验,验证了方法的有效性。深入仿真分析了一段编织钢丝-橡胶复合结构弹性弯管内流体冲击激励下管内压强、弹性管结构应力、应变、和加速度等振动响应特性及受弯管曲率的影响。通过弹性管高压流体冲击实验,验证了仿真分析结果的准确性。提出的复杂弹性管建模及流-固耦合动力学仿真分析方法对弹性管动态特性设计及系统匹配具有重要意义。

     

    Abstract: This paper proposes a three-dimensional finite element modeling and calculation method for accurately simulating the static and dynamic characteristics of fluid-structure coupling of a steel-wire-reinforced rubber pipe. The effectiveness of the method is verified through elastic tube tension, compression, bending stiffness tests and fluid-structure coupling vibration mode identification tests. The fluid-structure coupling dynamics simulation is performed for a steel-wire-reinforced rubber pipe of 0.5 m in length excited by different inner fluid pressure shocks. The influential characteristics of dynamic fluid pressure and pipe curvature on structural vibration stress, strain and acceleration are studied in details. The numerical simulation results of the pipe fluid-structural dynamics are validated with inner high-pressure fluid shock experiments. The presented fluid-structure coupling dynamic simulation method for the complicated elastic pipe structure is very effective for its dynamic characteristics design and performance validation.

     

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