Dynamical analysis of fluid lines coupled to mechanical systems taking into account fluid frequency-dependent damping and non-conventional constitutive models: part 1-Modeling fluid lines

作者：Catania Giuseppe; Sorrentino Silvio^*

来源：Mechanical Systems and Signal Processing, 2015, 50-51: 260-280.

DOI：10.1016/j.ymssp.2014.05.024

• Flow frequency-dependent friction
• Bi-dimensional fluid model
• Fractional derivative
• Fractional Maxwell model
• Modal analysis

The design of hydraulic transmission systems for control and actuation requires accurate knowledge of their dynamic response: some standard techniques are known to obtain a consistent dynamic model of a fluid line, including the contribution of inertia, compressibility and friction. In this paper an efficient procedure is developed for simulating the dynamic response of a fluid line in both the frequency and time domains, focusing the attention on the modal analysis of a discretized model, in view of coupling with mechanical systems. A bi-dimensional approach is adopted, and the laminar flow frequency-dependent friction is modeled using non-integer order differential laws, which may improve the accuracy of the simulated responses in comparison with more traditional Newtonian models.

• 出版日期2015-1