IJE TRANSACTIONS B: Applications Vol. 31, No. 2 (February 2018) 204-211   

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L. Zhao, Y. Yu and C. Zhou
( Received: November 09, 2016 – Accepted in Revised Form: November 30, 2017 )

Abstract    To protect the driver of off-highway dump trucks from the harmful vibration, this paper presents the comparison results to determine the optimal damping of the seat system by different optimization design plans. Three optimization schemes are considered including individually optimizing the damping of the cushion, individually optimizing the damping of the seat suspension, and integrately optimizing both of them. To compare the three optimization schemes, the seat system for an off-highway dump truck is taken as the baseline model. Initially, the parameters of the cushion, the seat suspension, and the air spring for the seat system were determined by corresponding test and the nonlinear dynaimic model of the seat system was created. Then, the model was validated by the test data from the field measurement. Subsequently, on the basis of the measured seat base acceleration, the corresponding damping coefficients under the three schemes were optimized. Finally, the road tests were conducted to verify and compare the degree of the comfort improvement. The results show that there is a relative smaller room for the comfort improvement by individually optimizing the cushion or by individually optimizing the seat suspension. The integrated optimization is the best to improve the comfort.N


Keywords    dump truck, harmful vibration, seat system, damping matching


چکیده    برای محافظت راننده­های کامیون­های­ تخلیه خارج از بزرگراه از ارتعاشات مضر، این پژوهش نتایج مقایسه­ای بین بهینه­ی سازی میرا کردن ارتعاشات را با طرح­های مختلف طراحی بهینه­ی سیستم صندلی ارائه می­دهد. سه طرح بهینه سازی در نظر گرفته شده­اند: بهینه سازی بالشتک به طور جداگانه، بهینه سازی سیستم تعلیق صندلی به طور جداگانه و بهینه سازی هر دو به طور یک­پارچه. برای مقایسه­ی سه طرح بهینه سازی، سیستم صندلی برای کامیون تخلیه خارج از بزرگراه به عنوان مدل پایه در نظر گرفته شده است. ابتدا پارامترهای بالشتک، تعلیق صندلی و هواپیما برای سیستم صندلی توسط آزمون مربوطه تعیین شد و مدل دینامیکی غیرخطی سیستم صندلی ایجاد شد. سپس مدل با داده­های آزمون از اندازه گیری میدانی تایید شد. پس از آن، بر اساس شتاب پایه اندازه گیری شده، ضرایب مربوط به ماندگاری تحت سه طرح به ترتیب بهینه شدند. در نهایت، آزمایش­های جاده­ای برای بررسی و مقایسه میزان بهبود راحتی انجام شد. نتایج نشان می­دهد که یک اتاق نسبتاً کوچک برای بهبود راحتی با یک دست بهینه سازی بالشتک یا به طور جداگانه بهینه سازی تعلیق صندلی وجود دارد. بهترین بهینه سازی برای بهبود راحتی، بهینه سازی یک­پارچه ست.


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