| 油锯伐木作业时人体腰椎受力变化与有限元分析 |
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| 引用本文： | 鲍春雨,刘晋浩.油锯伐木作业时人体腰椎受力变化与有限元分析[J].林业科学,2009,45(3). |
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| 作者姓名： | 鲍春雨 刘晋浩 |
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| 作者单位： | 1. 东北林业大学工程技术学院,哈尔滨,150040;天津体育学院,天津,300381
2. 北京林业大学工学院,北京,100083 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 利用横断面的CT数据建立具有高度几何材料相似性的用油锯伐木作业时伐木工腰椎节段L4-L5的三维有限元模型,分析伐木作业时伐木工弯腰和直立状态椎体、椎间盘和小关节的受力变化.通过本研究建立的L4-L5腰椎模型进行有限元分析,结果发现:伐木工伐木作业前屈时,椎间盘所受应力主要集中在外层纤维的中后部,在后部更为明显;椎体应力值高于其下方髓核应力值,邻近椎体终板应力明显高于其他部位,应力分布在皮质骨椎弓周围及邻近终板的地方,椎体后部结构应力集中在小关节上下关节突与椎弓根等位置;伐木工处于中立位时,椎间盘所受应力主要集中在纤维环后外侧;最大应力产生的部位有椎体松质骨临近终板的中央部位、椎体前方及前下方,这恰好是楔形压缩性骨折的好发部位,上下关节突亦受压.
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| 关 键 词： | 三维重建 有限元模型 生物力学 腰椎 油锯 |
Lumbar Spine Subjected Stress Characteristic for Operators Using Chain Saw in Forest Harvesting and Finite Element Analysis |
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| Bao Chunyu,Liu Jinhao.Lumbar Spine Subjected Stress Characteristic for Operators Using Chain Saw in Forest Harvesting and Finite Element Analysis[J].Scientia Silvae Sinicae,2009,45(3). |
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| Authors: | Bao Chunyu Liu Jinhao |
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| Institution: | 1.College of Engineering & Technique;Northeast Forest University Harbin 150040;2.Tianjin University of Sport Tianjin 300381;3.Shool of Engineering;Beijing Forestry of University Beijing 100083 |
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| Abstract: | The three-dimensional finite element model of lumbar vertebrae(L4-L5) with similar geometrical structure and material character,which can be used to analyze lumbar vertebrae biomechanics for the lumbermen using chain saw in forest harvesting. The research studied von mises tress on the vertebrae,intervertebral disc and zygapophysial joint while the lumbermen stoop and stand,the results were following:stress concentration at inervertebral disc was found at middle-posterior location of exterior annulus fibros... |
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| Keywords: | three-dimensional reconstruction finite element model biomechanics lumbar spine chain saw |
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