發(fā)布時間：2018-05-29 06:59

  本文選題：玉米移栽 + 缽盤��； 參考：《黑龍江八一農(nóng)墾大學》2017年博士論文

【摘要】：玉米移栽植質(zhì)缽育栽培技術是解決北方寒地玉米種植品質(zhì)和產(chǎn)量的有效途徑之一,但目前的育苗載體與玉米植質(zhì)缽育育苗栽植技術適應性較差。因此,本文根據(jù)玉米移栽植質(zhì)缽育栽植技術發(fā)展需求,研究設計了玉米移栽植質(zhì)缽育秧盤,利用理論分析、建模仿真和試驗研究的方法,從缽盤的設計制備、壓縮成型、干燥固化成型和力學性能等方面進行了較為深入的研究與探索。(1)根據(jù)玉米移栽植質(zhì)缽育栽培技術對缽育秧盤的農(nóng)藝要求,以及機械化栽植作業(yè)的需求,研究確定制備植質(zhì)缽盤的主要材料及其他輔助材料,根據(jù)制備缽盤物料的性質(zhì),通過對比分析的方法確定制備缽盤的設備,設計制備的工藝流程。(2)研究缽盤的設計思路,對玉米植質(zhì)缽育秧盤整體結構進行設計,利用UG NX8.0軟件建立缽盤成型模具三維模型,通過UG應用中的NX NASTRAN和ANSYS求解器,對模具成型部件進行有限元仿真分析,進行缽盤成型模具加工制造以及與成型設備的配套連接。(3)綜合分析生物質(zhì)物料熱壓成型和粉粒體物料常溫高壓成型機理,研究缽盤物料壓縮成型過程,建立缽盤成型物料實際壓縮狀態(tài)下的蠕變方程和三維狀態(tài)下缽盤物料壓縮成型時的粘彈塑性軸向應變表達式,揭示缽盤壓縮成型機理,分析確定能夠評價缽盤性能的評價指標。利用PROE軟件建立缽盤三維模型,ANSYS WORKBENCH模塊進行缽盤應力和變形情況仿真分析,確定移栽時切割缽盤的位置和切刀結構,獲得較佳的切割效果。(4)選取制備缽盤物料所占質(zhì)量比為因素進行缽盤成分配比單因素試驗,分析其對缽盤成型率、斷裂率、抗彎強度、抗壓強度、最大剪切力和膨脹率的影響。在單因素試驗研究結果的基礎上選取缽盤成型壓力、缽盤合成物料中水稻秸稈和增強基質(zhì)的質(zhì)量比為因素,以缽盤成型率、膨脹率、抗彎強度、缽盤的剪切力為性能指標,進行三因素五水平的二次正交旋轉組合試驗。建立回歸方程,分析各因素對性能指標的影響,進而得出影響性能指標的主次因素,通過主目標函數(shù)法,利用Design-Expert Version 8.0.5軟件,對性能指標的回歸方程進行優(yōu)化分析,獲得較佳參數(shù)組合,并針對玉米育苗及移栽要求驗證缽盤的性能指標。(5)對過熱蒸汽干燥固化缽盤的傳熱傳質(zhì)機理、過熱蒸汽干燥固化缽盤的干燥曲線方程和干燥凝結段的動力學特性進行理論分析,揭示缽盤干燥固化成型機理。在此基礎上,選取干燥時間、蒸汽溫度和過熱蒸汽質(zhì)量流量為因素進行單因素試驗,分析其對缽盤干強度、濕強度和干燥速率的影響。然后選取干燥時間、過熱蒸汽溫度和過熱蒸汽質(zhì)量流量為因素,以缽盤干強度、濕強度和濕基含水率為性能指標,設計三因素五水平的正交旋轉組合試驗。通過建立各因素與缽盤性能指標的回歸方程,分析缽盤性能指標受各因素的影響規(guī)律,得出影響性能指標的主次因素,通過主目標函數(shù)法,利用Design-Expert Version 8.0.5軟件,對性能指標的回歸方程進行優(yōu)化分析,獲得較佳參數(shù)組合,并對缽盤性能指標進行試驗驗證。(6)測試缽盤在切割速率下剪切力學性能變化情況,獲得在同一切割速率下不同秸稈質(zhì)量比缽盤剪切力學性能變化規(guī)律,在不同切割速率下同一秸稈質(zhì)量比缽盤剪切力學性能變化規(guī)律,缽盤制備和使用中三個階段點時剪切力學性能變化規(guī)律,為移栽機回轉器的運動參數(shù)設計提供一定的理論依據(jù)。通過育苗移栽試驗,驗證所研制的缽盤的育苗質(zhì)量和移栽效果。
[Abstract]:It is one of the effective ways to solve the planting quality and yield of Maize in the cold region of the north, but the adaptability of the current seedling raising carrier and the maize seedling cultivation technique is poor. By means of theoretical analysis, modeling simulation and experimental research, the research and exploration are carried out from the aspects of the design, compressing, drying, curing and mechanical properties of the bowl plate. (1) according to the demand of the agricultural technology of the corn transplanting bowl cultivation technique to the bowl raising plate and the demand of the mechanized planting work, the research is confirmed. To customize the main materials and other auxiliary materials for the plate plate, according to the properties of the material for making the bowl plate, the equipment for making the bowl plate is determined by comparative analysis and the process flow is designed. (2) the design idea of the bowl plate is studied, the whole structure of the corn seedling plate is designed, and the UG NX8.0 software is used to establish the molding mould of the bowl plate. With the three-dimensional model, through the NX NASTRAN and ANSYS solver in the UG application, the finite element simulation analysis of the molding parts of the mold is carried out, the plate forming mold is manufactured and the matching connection with the molding equipment is carried out. (3) comprehensive analysis of the mechanism of hot pressing of biomass materials and the normal temperature and high pressure forming mechanism of the powdered material, and the study of the compression of the material of the bowl plate. In the process, the creep equation of the material under actual compression and the expression of viscoelastic plastic axial strain in the compression molding of bowl plates under three-dimensional state are established. The mechanism of the plate compression molding is revealed and the evaluation index of the performance of the bowl plate can be evaluated. The three-dimensional model of the bowl plate and the ANSYS WORKBENCH module are established by using the soft parts of the bowl. The simulation analysis of the stress and deformation of the bowl plate is carried out to determine the position of the cutting plate and the structure of the cutter at the time of transplanting to obtain better cutting effect. (4) a single factor test on the ratio of the mass ratio of the material of the bowl to the bowl plate is selected to analyze the molding rate, the breaking rate, the bending strength, the compressive strength, the maximum shear strength and the maximum shear force of the bowl plate. The effect of expansion rate. On the basis of the result of single factor test, the molding pressure of bowl plate was selected. The mass ratio of rice straw and reinforced matrix in the composite material of bowl plate was the factor. The performance index of bowl plate forming rate, expansion rate, bending strength, and the shear force of bowl plate were used as the performance index, and the two orthogonal rotation combination tests of three factors and five levels were carried out. The effect of various factors on performance indexes is analyzed, and the main and secondary factors affecting the performance index are obtained. Through the main objective function method and the Design-Expert Version 8.0.5 software, the regression equation of the performance index is optimized and analyzed. The better parameter combination is obtained, and the performance indexes of the corn seedling and transplanting are verified by the needle. (5) the heat and mass transfer mechanism of the overheated steam drying and curing bowl, the drying curve equation of the overheated steam drying and curing bowl and the dynamic characteristics of the drying condensation section are analyzed. The drying time, the steam temperature and the mass flow of the superheated steam are selected as factors on the basis of the single factor. The effect of the drying time, the temperature of superheated steam and the mass flow of superheated steam as the factors, the dry strength of the bowl plate, the wet strength and the moisture content of the wet base were selected as the performance indexes, and the orthogonal rotation combination test of three factors and five levels was designed. The factors and the performance of the bowl disk were established. The regression equation of the index is used to analyze the influence rule of the performance index of the bowl plate, and the main and secondary factors that affect the performance index are obtained. Through the main objective function method, the regression equation of the performance index is optimized by Design-Expert Version 8.0.5 software, and the better combination of the parameters is obtained, and the performance index of the bowl plate is tested. (6) The change of the shear mechanical properties of the bowl at the cutting rate was tested. The change law of the mechanical properties of the different straw mass was obtained at the same cutting rate, and the same straw mass was compared with the mechanical property of the bowl at the different cutting rates. The change of the shear mechanical properties at the three stage point of the bowl was made. In order to provide a certain theoretical basis for the design of the motion parameters of the transplanter gyreator, the seedling quality and transplanting effect of the developed bowl plate are verified by the experiment of seedling transplanting.
【學位授予單位】：黑龍江八一農(nóng)墾大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：S513

【相似文獻】

相關期刊論文 前10條

1 胡波,侯林山,喬泉欣,葛茂生;玉米移栽機械化的綜合研究[J];中國農(nóng)機化;1997年03期

2 李德增;關于推廣玉米移栽技術的建議[J];天津農(nóng)林科技;1997年01期

3 劉曉明;;玉米移栽機具試驗與技術要求[J];農(nóng)機科技推廣;2013年06期

4 ;用毛主席的哲學思想指引科學種田——玉米移栽奪高產(chǎn)的}摎W[J];陜西農(nóng)業(yè)科技;1971年05期

5 ;玉米移栽新技術——大苗快速返苗移栽法實歐成功[J];陜西農(nóng)業(yè)科技;1971年05期

6 ;玉米移栽新技術——大苗快速返苗移栽法實驗成功[J];農(nóng)業(yè)科技通訊;1970年06期

7 A. S. Khehra;V. V. Malho tya;賀繩武;;印度冬季的玉米移栽[J];耕作與栽培;1992年02期

8 劉興文;玉米移栽的最佳苗齡期[J];農(nóng)村百事通;1996年04期

9 侯林山,胡波,孫紅磊;玉米移栽機械化的綜合研究[J];糧油加工與食品機械;1997年03期

10 尹玉清;玉米移栽創(chuàng)高產(chǎn)[J];河北農(nóng)業(yè)科技;1999年02期

相關重要報紙文章 前5條

1 殷曉光 李波;青岡昌盛鄉(xiāng)成立玉米移栽專業(yè)合作社[N];黑龍江經(jīng)濟報;2008年

2 本報記者 樊明富;旱作移栽正當時[N];遵義日報;2010年

3 翟應瓊;我區(qū)千畝連片超高產(chǎn)示范玉米移栽完畢[N];畢節(jié)日報;2008年

4 劉裕國;“旱”路也是增收道[N];人民日報;2007年

5 陽成功 譚芳;巴州區(qū)一季度經(jīng)濟運行平穩(wěn)[N];巴中日報;2006年

相關博士學位論文 前1條

1 馬永財;玉米移栽植質(zhì)缽育秧盤成型機理及試驗研究[D];黑龍江八一農(nóng)墾大學;2017年

，

本文編號：1949940