半正弦激励下烤箱脆值及破损边界曲线试验分析

李志强; 王羽星; 张素风

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半正弦激励下烤箱脆值及破损边界曲线试验分析
李志强^1,2, 王羽星^1,2, 张素风^1,2
1.陕西科技大学，西安 710021;2.轻化工程国家级实验教学示范中心，西安 710021

摘要:

目的为了获取烤箱产品在半正弦激励下的破损边界曲线和机械冲击脆值，解决因脆值选取不合理而造成的过包装问题。方法参考ASTM D 3332及相关理论，并通过预试验确定试验的相关参数，根据预试验参数，分别进行产品临界速度变化量测定试验，以及临界加速度测定试验，从而确定产品的破损边界曲线和脆值。结果该产品的临界速度变化值Δvc=2.27 m/s，第1次和第2次临界加速度测量值分别为Gm1=72.93g，Gm2=65.06g，脆值G=52g，并得到了破损边界曲线。结论试验结果为缓冲包装设计提供了可靠的脆值数据，为包装结构设计的合理性提供依据；试验中运用的产品破损边界曲线及产品本身的机械冲击脆值的测定方法对同类试验具有一定参考意义。

关键词: 半正弦激励破损边界曲线机械冲击脆值

DOI：10.19554/j.cnki.1001-3563.2020.05.023

分类号:TB482.2；TB487

基金项目:

Experimental Analysis of Fragility and Damage Boundary Curve of Oven under Half-sinusoidal Excitation

LI Zhi-qiang^1,2, WANG Yu-xing^1,2, ZHANG Su-feng^1,2

1.Shaanxi University of Science & Technology, Xi'an 710021, China;2.National Demonstration Center for Experimental Light Chemistry Engineering Education, Xi'an 710021, China

Abstract:

The paper aims to obtain the damage boundary curve and the mechanical shock fragility of oven products under half-sinusoidal excitation, to solve the problem of over-packaging caused by unreasonable selection of fragility. Referring to ASTM D3332 standard and related theory, relevant parameters of the test were determined by pre-test. Then, the product critical velocity variation measurement test and the critical acceleration measurement test were carried out respectively according to the pre-test parameters, and then the damage boundary curve and the fragility of product were obtained. The critical velocity variation was Δvc=2.27 m/s. The first critical acceleration (Gm1) was 72.93g, the second critical acceleration (Gm2) was 65.06g, and the fragility (G) was 52g. The damage boundary curve of the product was obtained. The test results provided reliable fragility data for design of cushioning packaging, and a basis for the rationality of the subsequent packaging structure design. Moreover, the product damage boundary curve and the measurement method of mechanical shock fragility of the product itself used in this test can provide some reference for similar tests.

Key words: half sinusoidal excitation breakage boundary curve mechanical shock fragility