樟子松枝丫材收集压缩特性模型  

Collection and Compression Characteristics Models of Pinus sylvestris Branches

作　　者：刘晋浩[1] 于航[2] 

机构地区：[1]北京林业大学,北京100083 [2]东北林业大学

出　　处：《东北林业大学学报》2015年第10期122-123,127,共3页Journal of Northeast Forestry University

基　　金：中央高校基本科研业务费专项(2572014AB24);国家林业局"948"项目(2013-4-19)

摘　　要：为降低林业生物质收集生产成本并提高运输装载率,保持材料压缩后原有物理特性,应用微机控制电子万能试验机,对含水率47.9%、平均直径50 mm的樟子松枝丫材,在压缩速度30 mm/min、最大加载力50 k N条件下进行压缩特性试验。根据试验结果建立了3个压缩特性模型。结果表明:压缩加载力随压缩位移的增加而增长;压缩密度越大,所需压力越大;随着压缩密度的增加,体积模量增加,说明材料的可压缩性越来越差。实验条件下,压缩后的材料没有显著破坏和变形,保持了原有的物理特性,不减少后续加工中的价值损失。In order to reduce the forest biomass cost of at-site processing,increase payloads during hauling and preserving physical properties,we studied the density behavior of the pinus sylvestris branches at 47. 9% moisture content and 50 mm diameter. The compression speed was 30 mm / min,and the biggest loading force was 50 k N with the universal compressor. We built three compression models to analyze the compaction characteristics of biomass samples. The loading force increased with the increase of compression displacement. The greater the compression density was,the greater compression loading force required. With the increase of compression density,bulk modulus increased,which indicated that the compressibility of material was worse and worse. The compressed materials were not obviously damaged and kept the manufacture value in the subsequent processing.

关 键 词：林业生物质收集 樟子松枝丫材 压缩加载力 压缩密度 体积模量 

分 类 号：S781[农业科学—木材科学与技术] S789.3[农业科学—林学]