Scholarlink

<p>As the automotive industry advances toward electrification, intelligence, and high performance, vehicle operating intensity continues to rise, placing greater demands on structural components. The fatigue behavior of the suspension lower control arm plays a critical role in ensuring vehicle handling stability and safety, necessitating thorough analysis and optimization. In this study, a rigid-flexible coupled dynamic model of an independent suspension system is developed, incorporating a finite element-based flexible representation of the lower control arm and a multi-body dynamic model of the suspension assembly. Fatigue life prediction is subsequently conducted, followed by an investigation into the primary influencing factors. Furthermore, piezoelectric ceramic-based active control strategies are introduced to improve the fatigue performance of the lower control arm. Two configurations—surface-bonded and internally embedded piezoelectric ceramics—are employed to enhance static stiffness and dynamic damping characteristics, thereby extending service life. Results indicate that fatigue life is most sensitive to the load amplification factor, followed by surface roughness, tensile strength, and bushing stiffness. Under reverse voltage actuation, the piezoelectric-enhanced lower control arm achieves a minimum fatigue life of 5.076 × 10<sup>7</sup> cycles, representing a 24.5% improvement.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of fatigue life and active vibration control via piezoelectric elements in vehicle suspension

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月15日

查看全文
  • Zhong Ping Wu,
  • Han Wang

摘要

As the automotive industry advances toward electrification, intelligence, and high performance, vehicle operating intensity continues to rise, placing greater demands on structural components. The fatigue behavior of the suspension lower control arm plays a critical role in ensuring vehicle handling stability and safety, necessitating thorough analysis and optimization. In this study, a rigid-flexible coupled dynamic model of an independent suspension system is developed, incorporating a finite element-based flexible representation of the lower control arm and a multi-body dynamic model of the suspension assembly. Fatigue life prediction is subsequently conducted, followed by an investigation into the primary influencing factors. Furthermore, piezoelectric ceramic-based active control strategies are introduced to improve the fatigue performance of the lower control arm. Two configurations—surface-bonded and internally embedded piezoelectric ceramics—are employed to enhance static stiffness and dynamic damping characteristics, thereby extending service life. Results indicate that fatigue life is most sensitive to the load amplification factor, followed by surface roughness, tensile strength, and bushing stiffness. Under reverse voltage actuation, the piezoelectric-enhanced lower control arm achieves a minimum fatigue life of 5.076 × 107 cycles, representing a 24.5% improvement.