New Simulation Method for Transient Response of Composite Fluid Line Systems(Effective Computation Techniques and Step Responses of Multiline Systems)

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  • New Simulation Method for Transient Response of Composite Fluid Line Systems
  • (Effective Computation Techniques and Step Responses of Multiline Systems)

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In the first report on this subject, a new simulation method for obtaining the transient response of composite fluid line systems, such as gas transport networks, air brake systems, pressure instrument lines and pneumatic control systems, has been presented. This simulation is based on the wave diagram of the fluid line system and Brown’s approximate step response of a semi-infinite line. In this report, two kinds of wave reduction techniques are introduced for the effective computation of the transient response. One is the unification of equivalent and similar waves at any junction of lines from different traveling routes. The other is the elimination of small waves attenuated by the partial reflection and the long propagation distance. For computed response examples using these techniques, the step responses of composite fluid line systems (a loop line system and multiline branching systems) are also presented.

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