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1.引言只有在确切地了解自振频率后,才可能预见车辆的运行品质。两轴车辆为由弹簧与质量组成的简单振动系统,其线振动自振频率的计算,单纯从数学方面来说是毫无问题的,而其角振动自振频率的计算,与实际测量结果相比较,由于惯性矩的估算不可靠,则常常是不准确的。因此,在两系串联振动系统中,用复杂公式计算的结果也仍然不很准确,而在很大程度上不能期望计算与测量结果相一致。将这样复杂的问题加以简化,但不是采用简单的假设来解决,已成为一项迫切的研究任务。经过几
1. INTRODUCTION The operational quality of a vehicle can only be foreseen only after an exact understanding of natural frequencies. The two-axle vehicle is a simple vibration system composed of a spring and a mass. The calculation of the natural vibration frequency of the line vibration is purely a matter of mathematics, and the calculation of the natural vibration frequency of the angular vibration is compared with the actual measurement results , It is often inaccurate due to the unreliable estimation of moment of inertia. Therefore, in the two-series series vibration system, the results calculated by complex formulas are still not very accurate, but to a large extent can not expect the calculation and measurement results are consistent. Simplifying such complex issues, but not using simple assumptions, has become an urgent research task. After a few