The brake squeal of automobiles has become one of the most annoying issues for passengers. Hence, it is essential to suppress the noise from the design stage of the braking system. In this article, the method for reducing squeal noise is explored based on the finite element model of the brake system. Studies on this model show that the structural deficiency of the brake caliper may cause the instability of the braking system and then cause squeal noise. Thus, the brake caliper is optimized to achieve a symmetrical contact pressure distribution on the inner and outer sides of the disc surface. The effectiveness of this method is analyzed by ANSYS/workbench software and verified in bench tests and road tests. The results show that the symmetrical caliper structure can make the brake pressure distribution more reasonable and the brake system more stable. Finally, it has reduced the noise incidence from 19.27% to 3.63%, which provides an effective method of reducing brake squeal noise.

汽车的制动声已成为乘客最烦恼的问题之一。因此，必须抑制来自制动系统设计阶段的噪声。在本文中，基于制动系统的有限元模型，探讨了降低尖叫声的方法。对这种模型的研究表明，制动钳的结构缺陷可能会导致制动系统的不稳定，进而产生尖叫声。因此，制动钳被优化以在盘表面的内侧和外侧上实现对称的接触压力分布。该方法的有效性通过ANSYS / workbench软件进行了分析，并在基准测试和路测中得到了验证。结果表明，对称的卡钳结构可以使制动压力分布更加合理，制动系统更加稳定。最终，它把噪音的发生率从19.27％降低到3.63％，这提供了一种有效的方法来降低制动啸叫声。