... while it has almost no impact on the FRFs in nonresonant regions. Because of the periodic variation in some characteristics, such as inertia, stiffness, or damping, the dynamic behavior of various mechanical systems can be modeled by a coupled set of second order linear differential equations...

... flow rates of certain valves with respect to others. Table 3 presents the numerical values of the variables used in the simulation. 15 02 2005 06 02 2007 aerodynamics pulsatile flow compressors valves linear differential equations pistons high-pressure effects...

... and Benson 11 reexamined Green’s stability problem using a linear, orthotropic constitutive relation. They showed that orthotropism significantly alters the twist angle at which buckling occurs. partial differential equations linear differential equations vibrations eigenvalues...

... and Structures , National Meteorlogy Press, Beijing, pp. 151–158. 01 June 1999 01 Oct 1999 vibrations linear differential equations Bessel functions structural engineering As is well known, free vibrations of SDOF systems with periodic variable parameters have been extensively...