测试木材剪切模量的自由板扭转振形法

doi:10.11707/j.1001-7488.20141117

Abstract

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

CLC Number:

TS643

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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[1]	Wang Zheng, Cao Yu, Wang Yunlu, Li Minmin. Testing Shear Modulus of Materials Based on Torsional Mode of Cantilever Plate [J]. Scientia Silvae Sinicae, 2017, 53(8): 101-112.
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Torsional Vibration Shape Method of Free Plate for Testing Shear Modulus of Lumber

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