Abstract
Based on the Lagrange classical stability concept, the approaches and corresponding equations for determining conditions for providing a static and tip-over stability of a two-chain suspension arrangement have been developed. Specifically, it has been proven that the arrangement is in the stable position of equilibrium if the cargo centre of gravity is placed within the isosceles triangle (named as static stability triangle). The base of this triangle is the base of the secondary suspension, and its height is a function of the geometric peculiarities of the arrangement and ratio between mass of spreader and cargo unit. Comparative tip-over stability analysis of the arrangements with different geometric peculiarities and configurations has been also performed.
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