Dynamic simulation and optimum design for the crankshaft-rolling-bearings system of a V-type reciprocating compressor

Two problems about a crankshaft-rolling bearings system in a V-type reciprocating compressor are studied by ADAMS,a special software for dynamical simulation.One is the dynamic performance of the system and the other is the dynamic optimization.First a statically indeterminate problem for rolling bearing is studied to obtain the formula between the applying load and the relevant displacement,force method and Hertz theory are used to solve the statically indeterminate problem.The numerical solution is acquired.Then the dynamical simulating model for the system is built in ADAMS and the crankshaft was treated as a flexible one.The dynamic response of the crankshaft journal center and dynamic reacting forces of two rolling bearings are obtained under rated operating condition.The mathematical model for dynamic optimization is presented,its objective function is the weighted average of the amplitude of the crankshaft journal center in the two bearings and the design variable is the angle of cylinder lines.The parametric simulating model is constructed in ADAMS to search the optimum solution.The relation between the design variable and objective value is disclosed through design study,which is a function module in the design evaluation tools of ADAMS.Numerical results are available for the dynamic design of reciprocating compressor.