黄花梨的动态特性试验研究

动态特性是评价水果质地和成熟程度的的一个重要指标。利用正弦曲线应力-应变动态试验测定了黄花梨的动态特性，发现在不同预加载荷、不同激振功率、不同成熟程度等条件下梨果实动态试验的弹性模量和相位角明显不同。这表明：在相同频率下，随预加载荷的增加，弹性模量值增加；在相同预载荷、激振功率和频率下，未成熟黄花梨的动态试验相位角较小、成熟黄花梨的相位角较大，未成熟黄花梨的动态试验弹性模量较大，成熟黄花梨的弹性模量较小

Research of dynamic equilibrium of pear

Dynamic equilibrium is critical aspect of fruit quality and ripeness. Dynamic equilibrium is determined according to sinusoid stress-strain. Pear fruit makes marked effects on dynamic modulus and phase position in different pre-load, active power and ripeness. Test shows that in same frequency pre-load makes modulus of elasticity increase, least mature Huanghua pears have smaller phase position and bigger modulus of elasticity than ripe ones.