Keeping a motor car clean is essential because of hygiene and sanitary standards, and allows also increasing service effectiveness. Basic problems while washing – large water consumption and dumping into sewage. In the paper there is considered a problem of ultrasonic technologies during washing, in particular for foam preparation. Foam, obtained with ultrasonic treatment, differs by low multiplicity, high stability and a spherical structure of bubbles.
The article discusses the issues of modeling of longitudinal and shear waves propagation in the cables of a road cable barrier. The problem was solved using explicit methods with finite deformation. In the first part of the article, the procedure considered, that allows to solve the problem. In the second part, the procedures for P and S waves verified, using analytical solutions and the commercial LS-DYNA code.
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