... equations structural acoustics vibrations 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 with periodic coefficients...

..., the characteristics and phases of the mass flow rates through the suction valves are changed by modifying the clearance volume. aerodynamics pulsatile flow compressors valves linear differential equations pistons high-pressure effects gas pulsations suction manifold automotive compressor...

... 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...

... of a moving flexible robot arm and a cantilever beam with nonperiodically varying length, etc., the methods of analyzing these problems inevitably differ from those of treating the vibration of systems with periodic variable parameters or constant parameters. vibrations linear differential equations...