IJE TRANSACTIONS B: Applications Vol. 30, No. 8 (August 2017) 1246-1252   

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JB. Qian, LP. Bao, RB. Yuan and XJ. Yang
( Received: April 29, 2017 – Accepted in Revised Form: July 07, 2017 )

Abstract    This paper presents an original interactive analysis method consisting of mathematical calculation based on theoretical mechanics and mechanics of materials, and dynamics simulation for quantifying outrigger reaction forces of a kind of hydraulic mobile crane, aiming to avoid the eventualities during normal operation as far as possible, for example, tipping-over. First, a three dimensional dynamic model is established and the statically indeterminate problem of mechanics of materials is employed in the mathematical calculation. Then, the multi body dynamics simulation is investigated and the corresponding force-time curves are generated simultaneously. Finally, the validity of the proposed method is proven by comparing the amplitudes of the two kind of force-time plots upon the model. Thus, the bearing load of the crane can be limited to a feasible range for static stability or avoiding outriggers collapse.


Keywords    Hydraulic mobile crane, outrigger reaction forces, mathematical calculation, dynamics simulation, force-time plots


چکیده    این مقاله یک روش تحلیلی تعاملی ارائه می دهد که متشکل از محاسبه ریاضی بر اساس مکانیک نظری و مکانیک مواد و شبیه سازی دینامیک برای اندازه گیری نیروهای واکنش بیرونی نوعی جرثقیل هیدرولیک متحرک است که هدف آن اجتناب از احتمالات در عملیات عادی است. اول، یک مدل پویای سه بعدی ایجاد شده است و سپس یک مساله نامعلوم مکانیک مواد در محاسبه ریاضی استفاده می شود. سپس، شبیه سازی دینامیک چند جسم مورد بررسی قرار می گیرد و منحنی های نیروی زمان مربوطه به طور همزمان تولید می شوند. در نهایت، اعتبار روش پیشنهادی با مقایسه دامنه های دو نوع نمودار توزیع نیرو- زمان، اثبات شده است. بنابراین، بار جرثقیل می تواند به یک محدوده قابل اجرا برای ثبات استاتیک محدود شود یا از سقوط بار جلوگیری شود.


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