تأثیر ناهمسانی تایر بر میزان هدررفت توان تولیدی موتور

نصیری, صیاد; رحیمی آسیابرکی, حسین

doi:10.48301/kssa.2021.298358.1654

تأثیر ناهمسانی تایر بر میزان هدررفت توان تولیدی موتور

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان

¹ عضو هیات علمی، مرکز آموزش مهارت‌های مهندسی، دانشگاه صنعتی شریف، تهران، ایران.

² عضو هیات علمی، گروه مهندسی مکانیک، دانشگاه فنی و حرفه‌ای، تهران، ایران.

10.48301/kssa.2021.298358.1654

چکیده

در حالت ایده‌آل باید تایر از نظر ابعاد هندسی، ضریب فنریت (سختی) و توزیع جرم، کاملاً همسان باشد. در این شرایط، هنگام حرکت خودرو، تایر بدون اعمال هیچ‌گونه نیرو و ارتعاشات اضافه و مضر به حرکت دورانی خود ادامه خواهد داد اما فرضیه حالت ایده‌آل فقط در شرایط تئوری امکان‌پذیر است و هیچ‌گاه در عمل قابل دستیابی نخواهد بود؛ بنابراین در عمل، تایر همواره دارای مقداری از انواع ناهمسانی‌های مختلف می‌باشد. این پژوهش به بررسی هدررفت انرژی یک تایر ناهمسان می‌پردازد. برای این منظور، ابتدا با استفاده از روش‌های تحلیلی، میزان نیروهای عمودی خالص اعمال‌شده به چرخ که ناشی از ناهمسانی و بارگذاری اولیه می‌باشد، استخراج گردید. سپس مدل‌سازی موردنظر در نرم‌افزار متلب صورت پذیرفت. پس ‌از آن، نیروی اصطکاک بین تایر و زمین محاسبه ‌شد و با نیروی محرک موتور مقایسه شد تا میزان هدررفت انرژی بین تایر و زمین استخراج گردد. در نهایت میزان توان تلف‌شده به دلیل وجود ناهمسانی تایر بررسی و ارزیابی شد.

کلیدواژه‌ها

20.1001.1.23829796.1400.18.3.16.9

موضوعات

طراحی سیستم های دینامیکی خودرو

عنوان مقاله [English]

The Effect of Tire Non-uniformity on Engine Power Loss

نویسندگان [English]

Sayyad Nasiri ¹
Hossein Rahimi Asiabaraki ²

¹ Faculty Member, Center for Engineering Skills, Sharif University of Technology, Tehran, Iran.

² Faculty Member, Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran.

چکیده [English]

An ideal tire should be completely uniform in geometric dimension, mass distribution and stiffness coefficient. Under such conditions, the tire would rotate without any unwanted and harmful vibrations and/or force alterations delivered to the vehicle body as it moves. However, the ideal conditions are only theoretically possible and cannot be the case in actual conditions. Accordingly, a tire has some non-uniformities in actual conditions. This paper aims to study the lost energy of a non-uniform tire of a passenger car. To achieve this, the vertical force on the tire, which is due to initial loading and also each case of non-uniformity, was analytically calculated. Then, the equations were simulated in MATLAB software package. This was followed by comparing the frictional force between the tire and ground to the engine force to calculate the power loss. Finally, the value of power loss as a result of all kinds of tire non-uniformity was evaluated.

کلیدواژه‌ها [English]

Tire
Non-uniformity
Imbalance
Power loss
Engine

مراجع

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