摘要
本文以某发动机连杆为研究对象,分别对三种不同材料 40 Cr、45 钢和 QT40-10 制成的连杆进行有限元模态和谐响应研究,并得出三种不同材料连杆的固有频率、易发生共振破坏的区域以及外部激励应该避开的频率.研究结果表明:QT40-10 的固有频率较 40Cr和 45 钢的低,而且采用 40Cr中碳合金钢制成的连杆应避免的外部激励频率较高,而且振幅最小.
Abstract
This article takes a certain engine connecting rod as the research object,and conducts finite element modal and harmonic response research on connecting rods made of three different materials,40 Cr,45 steel,and QT40-10,respectively,and obtains the natural frequencies of three different materials of connecting rods,areas prone to resonance failure,and frequencies that external excitation should avoid.The research results indicate that:the natural frequency of QT40-10 is lower than that of 40 Cr and 45 steel,and connecting rods made of 40 Cr medium carbon alloy steel should avoid higher external excitation frequencies and have the smallest amplitude.
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