Pipeline Transients with Frequency-Dependent Wavespeed

这一建议涉及管道系统中的不稳定流体流动 其中波的传播速度是频率相关的， 比常数。 建议的解决方案程序在 频域，其中良好建立的频率响应和自由 将修改振动分析，以分析周期性运动 结合频率相关的波速。 另夕h 脉冲响应方法，结合快速傅立叶变换，将 可用于解决非周期性瞬态情况。 线性和 将利用非线性传递函数技术。 线性和非线性脉冲响应方法提供了一个有吸引力的 软管、管材和管道的替代品， 频率依赖行为在许多应用中， 依靠液压控制管路提供能源的行业 传动到机床、机器人、重型设备上的执行器， 运输车辆等长油、气、水输送 水电方案中的管道和隧道通常会显示出 频率依赖行为 本提案中的方法是 taylored来解决这些行业的这些主题。

This proposal is concerned with unsteady fluid flow in pipeline systems in which the wave propagation velocity is frequency dependent, rather than constant. The proposed solution procedure operates in the frequency domain where well established frequency response and free vibration analyses will be modified to analyze periodic motions incorporating the frequency-dependent wavespeed. Additionally, the impulse response method, incorporating the Fast Fourier Transform, will be used in the solution of nonperiodic transient cases. Both linear and nonlinear transfer function techniques will be utilized. The linear and nonlinear impulse response method provides an attractive alternative for hoses, tubes and pipelines that display a frequency-dependent behavior. Applications are numerous in many industries that rely on hydraulic control lines to provide energy transmission to actuators on machine tools, robots, heavy equipment, transportation vehicles, etc. Long oil, gas, and water transmission pipelines, and tunnels in hydropower schemes often display a frequency-dependent behavior. The methods in this proposal are taylored to address these topics for these industries.