Transfer matrix method for determination of the natural vibration characteristics of elastically coupled launch vehicle boosters

Laith K.Abbas; Qinbo Zhou; Hossam Hendy; Xiaoting Rui

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Transfer matrix method for determination of the natural vibration characteristics of elastically coupled launch vehicle boosters

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摘要

The analysis of natural vibration characteristics has become one of important steps of the manufacture and dynamicdesignintheaerospaceindustry.Thispaperpresents a new scenario called virtual cutting in the context of the transfer matrix method of linear multibody systems closedlooptopologyforcomputingthefreevibrationcharacteristics of elastically coupled fl xible launch vehicle boosters. In this approach, the coupled system is idealized as a triple-beam system-like structure coupled by linear translational springs,where a non-uniform free-free Euler–Bernoulli beam is used.A large thrust-to-weight ratio leads to large axial accelerations that result in an axial inertia load distribution from nose to tail. Consequently, it causes the development of significan compressive forces along the length of the launch vehicle.Therefore, it is important to take into account this effect in the transverse vibration model. This scenario does not need the global dynamics equations of a system, and it has high computational efficien y and low memory requirements. The validity of the presented scenario is achieved through comparison to other approaches published in the literature.

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《力学学报：英文版》 |2015年第004期|570-580|共11页
作者
Laith K.Abbas; Qinbo Zhou; Hossam Hendy; Xiaoting Rui;
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作者单位

Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing 210094,China;

Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing 210094,China;

Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing 210094,China;

Institute of Launch Dynamics,Nanjing University of Science and Technology,Nanjing 210094,China;

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Transfer matrix method for determination of the natural vibration characteristics of elastically coupled launch vehicle boosters

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