### Abstract

Language | English |
---|---|

Pages | 127-134 |

Number of pages | 8 |

Journal | Materials Science Forum |

Volume | 440-441 |

DOIs | |

Publication status | Published - 2003 |

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### Keywords

- spreader lifting gear
- multi-cable suspension
- rubber tyred gantry
- nonlinear dynamic model

### Cite this

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*Materials Science Forum*, vol. 440-441, pp. 127-134. https://doi.org/10.4028/www.scientific.net/MSF.440-441.127

**Derivation of the stiffness terms for a multi-cable spreader suspension system with stiff elastic cables.** / Forehand, D.I.M.; Cartmell, M.P.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Derivation of the stiffness terms for a multi-cable spreader suspension system with stiff elastic cables

AU - Forehand, D.I.M.

AU - Cartmell, M.P.

PY - 2003

Y1 - 2003

N2 - At its simplest a multi-cable spreader suspension system consists of a rectangular spreader suspended below a rectangular trolley by four cables of equal length. These four cables are attached to the corners of the spreader and when the system is in its undisturbed configuration they are all vertical, and consequently parallel. If we insist that all the cables are inextensible and remain taut then in the case of combined translation and rotation of the spreader this is not a well defined problem because it represents an over-determined system. In fact, if the cables are inextensible then one of them will go slack in the case of combined translational and rotational motions. As an alternative approach we can assume that the cables stretch slightly and this is the modelling strategy adopted here. That is, in this paper we present the initial development of an analytical model of a multi-cable spreader suspension system where the four cables are approximated by linear elastic cables of high stiffness K. To be more specific, we derive the fundamentally all-important stiffness terms in the equations of motion for the above problem.

AB - At its simplest a multi-cable spreader suspension system consists of a rectangular spreader suspended below a rectangular trolley by four cables of equal length. These four cables are attached to the corners of the spreader and when the system is in its undisturbed configuration they are all vertical, and consequently parallel. If we insist that all the cables are inextensible and remain taut then in the case of combined translation and rotation of the spreader this is not a well defined problem because it represents an over-determined system. In fact, if the cables are inextensible then one of them will go slack in the case of combined translational and rotational motions. As an alternative approach we can assume that the cables stretch slightly and this is the modelling strategy adopted here. That is, in this paper we present the initial development of an analytical model of a multi-cable spreader suspension system where the four cables are approximated by linear elastic cables of high stiffness K. To be more specific, we derive the fundamentally all-important stiffness terms in the equations of motion for the above problem.

KW - spreader lifting gear

KW - multi-cable suspension

KW - rubber tyred gantry

KW - nonlinear dynamic model

U2 - 10.4028/www.scientific.net/MSF.440-441.127

DO - 10.4028/www.scientific.net/MSF.440-441.127

M3 - Article

VL - 440-441

SP - 127

EP - 134

JO - Materials Science Forum

T2 - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

ER -