Reducing aeration and cavitation effect in shock absorbers using uid-structure interaction simulation

  • Piotr Czop AGH University of Science and Technology. Department of Robotics and Mechatronics
  • Jacek Gniłka Silesian University of Technology, Institute of Theoretical and Applied Mechanics

Abstract

This paper presents a fluid-structure interaction simulation applicable for evaluating and optimizing hydraulic valve designs. A special emphasis is placed on shim stack valve commonly used in automotive and railway shock absorbers. For simplicity, the problem was effectively reduced to a two-dimensional (2D) problem. This was accomplished by introducing section-lines along which the pressure profile was computed to find and evaluate the global minimum. The global minimum was then treated as the design ranking measure. This ranking function provided a means to choose an optimal design from a set of available design variants. In the presented results, the ranking is problem-specific as it identifies and localizes low pressure zones that are the root causes of both aeration and cavitation effects. The damping force performance was experimentally evaluated for both the baseline and optimized valve design using a shock absorber level test on a servo-hydraulic test rig.

Keywords

valve system, aeration, cavitation, computational fluid dynamics, fluid-structure interactions, simulation, optimization,
Published
Sep 17, 2017
How to Cite
CZOP, Piotr; GNIŁKA, Jacek. Reducing aeration and cavitation effect in shock absorbers using uid-structure interaction simulation. Computer Assisted Methods in Engineering and Science, [S.l.], v. 23, n. 4, p. 171–189, sep. 2017. ISSN 2299-3649. Available at: <http://cames.ippt.gov.pl/index.php/cames/article/view/181>. Date accessed: 11 dec. 2017.
Section
Articles