أوتاد الجاذبية الجبلية تعمل على استقرار حركة دوران الأرض
المؤلفون: بنعود سعد
المجلة: المجلة الإماراتية لعلوم وهندسة الفضاء
تاريخ النشر: المجلد 1 العدد 1
الكلمات الدالة:
دوران الأرض ، الجبال ، لحظة قوة الضغط ، لحظة القصور الذاتي ، مخالفات الأرض ، الكتل التصحيحية المتوازنة للأرض ، الجبال استقرار دوران الأرض ، الوتد الثقالي ، الانحرافات الشاذة
خلاصة
الهدف من هذا البحث هو دراسة تأثير أوتاد الجاذبية الجبلية على حركة دوران الأرض. النظام الفيزيائي المدروس هو جبل واحد تم اختياره من بين جميع الجبال الموجودة على الكرة الأرضية. يقودنا تطبيق قوانين ميكانيكا نيوتن على القوى المؤثرة في نظام الجبال إلى معرفة معادلة حركة دوران الأرض. نتيجة لذلك ، يتأرجح التسارع الزاوي بسعة ~ 3.95 ´ 10-21 rad.s-2. تظهر تحليلات النتائج التي تم الحصول عليها أن جبلًا واحدًا ، إذا كان موجودًا بمفرده ، سيؤدي إلى زعزعة استقرار الأرض وإخفاء جميع تأثيرات المد والجزر على حركة دوران الأرض. أكبر عقبة تمنعنا من رؤية هذه الظاهرة هي حقيقة أن الجبال الموجودة على الأرض عديدة وموزعة بشكل متماثل فيما يتعلق ببعضها البعض. هناك عدة آلاف من الجبال على الأرض وتحتوي القشرة الأرضية أيضًا على العديد من المخالفات الأخرى. وهكذا ، فإن تأثيرات الجبال وشذوذها المضاد على حركة الأرض تلغي بعضها البعض ، وتحقق استقرارها. إذا لم تكن الجبال موجودة ، لكانت الأرض قد اهتزت منذ اللحظة الأولى لوجودها وبالتالي مشتقة من مسارها منذ زمن طويل. نتيجة لذلك ، فإن الجبال هي للأرض ما يوازن الكتل التصحيحية للأجسام الدوارة مثل العجلة: إنها تثبت الأرض بالفعل. بدون الجبال ، يمكن أن يسبب اهتزاز الأرض فشلًا كارثيًا ، فضلاً عن الضوضاء وعدم الراحة. وبالتالي ، فإن الجبال عبارة عن أوتاد جاذبية تعمل على تثبيت حركة دوران الأرض أثناء الدوران على طول مسارها الحلزوني بعد حركة الشمس عبر الفضاء.
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