测试木材剪切模量的自由板扭转振形法

doi:10.11707/j.1001-7488.20141117

林业科学 ›› 2014, Vol. 50 ›› Issue (11): 122-128.doi: 10.11707/j.1001-7488.20141117

测试木材剪切模量的自由板扭转振形法

王正¹, 高子震¹, 顾玲玲², 刘斌², 王亚磊², 杨燕²

1. 南京林业大学材料科学与工程学院南京 210037;
2. 南京林业大学机械电子学院南京 210037

收稿日期:2013-11-21 修回日期:2013-12-21 出版日期:2014-11-25 发布日期:2014-12-04
基金资助:
江苏省高校优势学科建设工程项目资助( PAPD).

Torsional Vibration Shape Method of Free Plate for Testing Shear Modulus of Lumber

Wang Zheng¹, Gao Zizhen¹, Gu Lingling², Liu Bin², Wang Yalei², Yang Yan²

1. College of Materials Science and Engineering, Nanjing Forestry University Nanjing 210037;
2. College of Mechanical and Electronic Engineering, Nanjing Forestry University Nanjing 210037

Received:2013-11-21 Revised:2013-12-21 Online:2014-11-25 Published:2014-12-04

摘要/Abstract

摘要：

根据ANSYS程序和优化原理得到自由板一阶扭转振形函数, 应用能量法导出木材剪切模量和自由板一阶扭转频率的关系式.该关系式的正确性得到木材剪切模量的数学仿真、试验测试和静态试验3个方面的验证.瞬态激励法测量西加云杉、国产马尾松、油松、杉木和蒙古栎自由板的频谱, 且借助于互功率谱概念从频谱图中识别出自由板的一阶扭转频率.

关键词: 自由板, 扭转振形, 扭转频率, 频谱, 剪切模量

Abstract:

According to ANSYS program and optimizing principle getting at the first order torsional vibration shape function for free plate, the relation between lumber shear modulus and the first-order torsional frequency for the free plate was induced by the method of energy. The correctness of this formula was verified by the three aspects of mathematical simulation of lumber shear modulus, experimental test and static test. Transient excitation method can measure the spectrum of Sitka spruce, domestic Pinus massoniana, Pinus tabulaeformis, Cunninghamia lanceolata and Quercus mongolica wood free plates. With the aid of cross-power spectrum concept from the spectrum diagram we can identify first-order torsional frequency of free plate.

Key words: free plate, torsional vibration shape, torsional frequency, frequency spectrum, shear modulus

中图分类号:

TS643

王正, 高子震, 顾玲玲, 刘斌, 王亚磊, 杨燕. 测试木材剪切模量的自由板扭转振形法[J]. 林业科学, 2014, 50(11): 122-128.

Wang Zheng, Gao Zizhen, Gu Lingling, Liu Bin, Wang Yalei, Yang Yan. Torsional Vibration Shape Method of Free Plate for Testing Shear Modulus of Lumber[J]. Scientia Silvae Sinicae, 2014, 50(11): 122-128.

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测试木材剪切模量的自由板扭转振形法

Torsional Vibration Shape Method of Free Plate for Testing Shear Modulus of Lumber

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