حساب منحنيات الاستعدال للسفينة عن طريق التحكم المتتابع بارتفاع سطح الطفو وزاوية ميله - طريقة جديدة
Abstract
يعالج هذا البحث مسألة حساب منحنيات الاستعدال للسفينة، بدلالة زوايا الميلان العرضي, يتم حساب حجم الإزاحة عن طريق تكامل المقاطع العرضية للسفينة المائلة التي تتقاطع مع سطح الماء, عند زاوية ميلان معطاة و سطح ماء معطى، يتم حساب حجوم إزاحة متزايدة للسفينة وفي كل مرة يتم حساب إحداثيات مركز الدفع وبالتالي عزم الاستعدال المتعلق بالشكل يتم بعدئذ الانتقال إلى زاوية أخرى. تتم بعدئذ معالجة جدول المعطيات المحسوبة لحساب حزم المنحنيات بدلالة حجم الإزاحة و زاوية الميلان العرضي.
This paper deals with the computation of the righting curves as a function of the heel angle for a transversal inclined ship. For a given water plane and heel angle the displacement is calculated by the integrating of the immersed area intersecting with the water plane. By changing the water plane position with a fixed heel angle, variable values of displacements are obtained. At each step, the center of buoyancy is computed. The KN is computed as a function of the buoyancy center position. The computations are repeated for a range of heel angle values. The obtained tables of results are treated in order to draw a net of curves relating the KN to both heel angle and the displacement.
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