Suitable for Reliable Model and Decision of Automotive Powertrain Mounting System
In order to reduce the influence of mounting instability on Powertrain mounting system(PMS),a reliable model applicable to automotive PMS was designed and an example was given.Based on the analysis of the relationship between PMS design mode and reliability,a reliable design model including three steps is constructed.The results show that:according to the reliable design test results,the reliability of all constraints has been significantly improved,the reliable design process is judged to meet the requirements.There exists a range almost unaffected by the suspension stiffness in the feasible region,which can be regarded as the ideal space for reliable design.When the decoupling rate is constrained,the fourth mode reaches the minimum reliability.When the uncertainty level is gradually increased,the reliability of the second mode decreases rapidly.For the frequency interval constraint,the frequency interval of the second and third orders is the most prone to failure,and vertical excitation will further stimulate the lateral vibration of the powertrain.
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