نوع مقاله : علمی - پژوهشی
1 دانشجوی دکتری مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران.
2 استاد، گروه مهندسی ماشینهای کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
عنوان مقاله [English]
In the present study, the effects of three type of Iranian hardwoods (Beech, Hornbeam, and Alder) on the vibration level and characteristics of Stihl-MS230 chainsaw were analyzed and the results were compared together and to the control sample (without cutting). The vibration acceleration on front and rear handles of chainsaw were measured in three perpendicular axes based on ISO 7505 (1986) standard. The total root mean square (RMS) acceleration and frequency-weighted vibration acceleration (Ahw) were obtained from acceleration-time spectrum and acceleration-frequency spectrum respectively in accordance with guidelines of ISO 5349 (2001). The results indicated that the effect of operational mode, axis, and interaction between them on the RMS acceleration were statistically significant (p˂0.01). Also, the effect of operational mode, position, axis, and interaction between them on the Ahw were significant (p˂0.01). However, Ahw values of different woods were not found statistically different (p>0.05). Analysis of RMS acceleration revealed no significant difference between handles (p>0.05). While, frequency-weighted vibration acceleration of rear handle was significantly more than that of front handle (p<0.01).