SMT Examines Spline Rumble with MASTA

<p style="text-align: center;"><img src="/ueditor/php/upload/image/20240425/1714050714708905.png" title="1714050714708905.png" alt="1.png"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">Spline rumble is characterized by a multiple low shaft order droning noise.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">It arises in electrified vehicle (EV) powertrains due to excitation at the spline connection between the motor rotor and the transmission input. It is caused by the interactions between manufacturing errors.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">In this article SMT will be looking at how&nbsp;MASTA&nbsp;can be used to predict rumble in a modern EV gearbox with a three-bearing input assembly layout.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">SMT uses a quasi-static analysis in&nbsp;MASTA Advanced System Deflection&nbsp;to understand the fundamental mechanism and predict the excitation force at the spline.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">Then they’ll use a time stepping analysis using&nbsp;MASTA’s DRIVA&nbsp;modules&nbsp;to fully model the non-linear dynamics.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">Finally, they will perform a sensitivity study on the manufacturing errors to see how different errors contribute to rumble.</span></p><p><br/></p>