黄花梨的撞击力学特性研究

基金项目: 国家自然科学基金项目(30170533);浙江省自然科学基金项目(300296)

Impact Characteristics of Huanghua Pear

摘要: 农产品在收获、分级、包装、运输和加工中将发生机械损伤,而碰撞是导致机械损伤的主要原因之一。该文以黄花梨为试验对象,进行了不同下落高度、不同梨质量和坚实度等对碰撞参数指标如力峰值、到达力峰值时间、碰撞总时间、力峰值/到达力峰值时间的比值等影响的碰撞特性试验。试验表明3个试验因子对力峰值/到达力峰值时间的比值、损伤体积和力峰值的影响大都为显著。碰撞参数指标内部之间的相关性不尽相同。碰撞损伤预测模型可采用V=β0+β1h+β2m+β3f来表达
- 梨 /
- 碰撞 /
- 损伤 /
- 模型 /
- 力学特性
Abstract: Bruises occur during harvesting, handling, grading, and transporting. The conditions necessary for pears to possess a high resistance to bruising remain unknown. It would be useful to know the variability of pear bruise resistance in relation to dropping height, mass, firmness and location around the fruit. The effects of dropping height, mass, firmness, fruit dropping orientation on bruise volume and various impact parameters (contact time, time to peak force, peak force, F/T) were determined for pears. Most of the impact parameters changed with dropping height, mass and firmness of fruit. The bruise volume could be predicted by multiple regression model based on dropping height, mass and firmness of pear.
- pear /
- impact /
- bruising /
- model /
- dynamics characteristics