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以某车悬架非线性振动为研究对象,建立了系统振动微分方程,提出所考虑的悬架非线性因素,用龙格-库塔方法在MATLAB中对系统运动方程求解;对该车进行随机路面平顺性实验,验证所建模型的合理性,结合数值求解结果和实验数据分析考虑悬架非线性因素对平顺性分析的影响。研究表明通过数值计算分析分析平顺性时,在高速条件下考虑悬架阻尼非线性的影响更能准确的反映对平顺性的预测,这对优化数值模型和理论分析具有参考价值。
Taking the nonlinear vibration of a vehicle suspension as the research object, the system vibration differential equation is established and the nonlinear factors of the suspension are put forward. The Runge-Kutta method is used to solve the system equations of motion in MATLAB. Pavement smoothness test to verify the rationality of the model, combined with the numerical solution and experimental data analysis to consider the suspension nonlinear factors on the ride analysis. The research shows that considering the influence of suspension nonlinearity under high speed can more accurately reflect the prediction of ride comfort when analyzing the ride comfort through numerical calculation, which is of reference value to optimize numerical model and theoretical analysis.