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为了对重型载货汽车驱动桥壳工作特性进一步研究,以重型载货汽车桥壳作为研究对象,通过使用有限元方法、Miner线性损伤累积理论和Goodman疲劳原理并接合路况效应,使分析条件进一步贴合实际工况,研究了重型载货汽车桥壳在实际路况作用下应力、变形及寿命和安全系数变化规律。分析结果表明:通过将计算模型中的S-N曲线进行修正和引入路况效应载荷谱,该型重型载货汽车驱动桥壳产品性能计算参数与实际台架试验结果相同,具有实际可靠性;重型载货汽车驱动桥壳在轮边部位存在规律性的最大应力;桥壳的前六阶固有频率相对实际工况路面对桥壳的激振频率相差较大;重型载货汽车驱动桥壳大部分损伤出现在高应力幅下且疲劳寿命满足企业要求。
In order to further study on the working characteristics of the axle housing of heavy truck, the heavy duty truck axle housing is taken as the research object. By using finite element method, Miner linear damage accumulation theory and Goodman fatigue principle, According to the actual working conditions, the variation regularity of stress, deformation, life span and safety factor of heavy duty truck axle housing under the actual road conditions is studied. The analysis results show that the product performance calculation parameters of this type of heavy duty truck drive axle housing are the same as the actual bench test results through the correction of the SN curve in the calculation model and the introduction of the road load effect load spectrum, The maximum stress of the drive axle housing is regular at the wheel rim; the first six natural frequency of the axle housing is different from the actual working condition on the vibration frequency of the axle housing; the most damage of the axle housing of the heavy truck Appears in the high stress amplitude and fatigue life to meet business requirements.