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本文论证了对车辆缓冲、熄振性能要求日益提高的情况下,使用筒式减振器的局限性及采用同轴式减振器的必要性。并在弹性力零点与摩擦阻力零点相重合的条件下,用逐段积分法研究了单自由度车体的熄振规律(即振幅、速度按等比级数衰减等)。并导出了振动周期的计算式。最后按与粘性阻尼等效熄振的条件,求得摩擦阻尼比例系数μ的计算式。本文为摩擦减振器设计主要参数的选定提供了理论依据。
This paper demonstrates the limitations of the use of tube dampers and the necessity of using coaxial shock absorbers in the case of increasingly demanding buffer and quench performance requirements. The law of extinction of a single degree of freedom body (that is, the amplitude and velocity decay by geometric progression) is studied by the piecewise integral method under the condition that the zero point of elastic force and the zero point of frictional resistance coincide. And the calculation formula of vibration cycle is deduced. Finally, according to the condition of viscous damping equivalent to quenching, the calculation formula of friction damping ratio coefficient μ is obtained. This paper provides a theoretical basis for the selection of the main parameters of friction damper design.