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Harmonic amplitude dependent dynamic stiffness of hydraulic bushings: Alternate nonlinear models and experimental validation

机译：液压衬套的取决于谐波振幅的动态刚度：替代非线性模型和实验验证

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摘要

The dynamic stiffness properties of automotive hydraulic bushings exhibit significant amplitude sensitivity which cannot be captured by linear time-invariant models. Quasi-linear and nonlinear models are therefore proposed with focus on the amplitude sensitivity in magnitude and loss angle spectra (up to 50 Hz). Since production bushing model parameters are unknown, dynamic stiffness tests and laboratory experiments are utilized to extract model parameters. Nonlinear compliance and resistance elements are incorporated, including their interactions in order to improve amplitude sensitive predictions. New solution approximations for the new nonlinear system equations refine the multi-term harmonic balance term method. Quasi-linear models yield excellent accuracy but cannot predict trends in amplitude sensitivity since they rely on available dynamic stiffness measurements. Nonlinear models containing both nonlinear resistance and compliance elements yield superior predictions to those of prior models (with a single non-linearity) while also providing more physical insight Suggestion for further work is briefly mentioned.
机译：汽车液压衬套的动态刚度特性显示出显着的幅度灵敏度，这是线性时不变模型无法捕获的。因此，提出了拟线性和非线性模型，重点是幅度幅值灵敏度和损耗角频谱（高达50 Hz）。由于生产套管模型参数未知，因此使用动态刚度测试和实验室实验来提取模型参数。包括非线性顺应性和阻力元素，包括它们的相互作用，以改善幅度敏感的预测。新的非线性系统方程的新的解决方案逼近完善了多项谐波平衡项法。准线性模型具有出色的准确性，但是由于它们依赖于可用的动态刚度测量，因此无法预测振幅灵敏度的趋势。既包含非线性阻力又包含顺应性元素的非线性模型可以提供比先前模型（具有单个非线性）更好的预测，同时还提供了更多的物理见解。简要提到了进一步工作的建议。

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  • 来源
    《Mechanical systems and signal processing》 |2016年第6期|589-606|共18页
  • 作者

    Luke Fredette; Jason T. Dreyer; Todd E. Rook; Rajendra Singh;

  • 作者单位

    Acoustics and Dynamics Laboratory, Smart Vehicle Concepts Center, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, USA;

    Acoustics and Dynamics Laboratory, Smart Vehicle Concepts Center, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, USA;

    Acoustics and Dynamics Laboratory, Smart Vehicle Concepts Center, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, USA;

    Acoustics and Dynamics Laboratory, Smart Vehicle Concepts Center, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, USA;

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  • 正文语种 eng
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  • 关键词

    Hydraulic devices; Nonlinear system simulation; Multi-term harmonic balance method; Vehicle application; Sinusoidal testing;

    机译：液压装置;非线性系统仿真;多项谐波平衡法;车辆应用;正弦测试;

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