基于Green函数的轮胎冲击载荷特性反演方法研究

Study of inversion method of tire impact load characteristics based on Green function

  • 摘要: 【目的】针对轮胎冲击下加筋板载荷难以直接测量的问题,本文通过反演的方式对其进行识别,并对轮印载荷的分布特性展开了研究。【方法】本文以某船甲板加筋板为研究对象,根据轮胎冲击下加筋板动力响应,基于Green函数与广义交叉验证准则(GCV)准则,建立轮胎冲击载荷的有效反演方法。在此基础上,研究整车多个轮胎冲击加筋板的反演问题,分析多源载荷作用对载荷反演的影响。【结果】针对凸型、马鞍型与凹型轮印载荷分布形式,完成加筋板轮胎冲击载荷分布特性识别,对比仿真计算结果证明了反演方法的有效性,相对误差小于5%,在允许范围之内。【结论】本文提出了冲击载荷分布特性的反演方法,解决了冲击载荷作用时间短、结构动力响应范围有限、多源冲击载荷联合作用对载荷反演带来的问题,为实船轮印载荷识别提供了新思路。

     

    Abstract: Objectives In order to solve the problem that the load of stiffened plate under tire impact is difficult to be measured directly, this paper identifies it by means of inversion, and studies the distribution characteristics of wheel print load. Methods In this paper, based on the dynamic response of the stiffened plate under tire impact, an effective inversion method of tire impact load was established based on Green function and generalized cross validation criterion (GCV). On this basis, the inversion problem of multi-tire impact stiffened plate is studied, and the influence of multi-source load on load inversion is analyzed. Results The impact load distribution characteristics of stiffened plate tires were identified according to the load distribution patterns of convex, saddle and concave wheel marks. The simulation results proved the effectiveness of the inversion method, and the relative error was less than 5%, which was within the allowable range. Conclusions In this paper, an inversion method of impact load distribution characteristics is proposed, which solves the problems caused by short impact load action time, limited structural dynamic response range and combined action of multi-source impact loads, and provides a new idea for the identification of wheel print loads on real ships.

     

/

返回文章
返回