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Journal articles on the topic 'HypoDD'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Araujo, Sebastián, Liliana Troncoso, and Mario Ruiz. "Relocalización por dobles diferencias del cluster sísmico de Pisayambo." La Granja 10, no. 2 (2009): 27. http://dx.doi.org/10.17163/lgr.n10.2009.03.

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<p>En este artículo se presentan los resultados de la relocalización de sismos relacionados con el cluster sísmico de Pisayambo, provincia de Tungurahua en Ecuador. Se utiliza el programa hypoDD basado en el método de dobles diferencias. Los resultados obtenidos ofrecen evidencia sobre eventos en Pisayambo que definen una región caótica de focos sísmicos superficiales. Este trabajo es una muestra importante del funcionamiento del program hypoDD para el caso de problemas sísmicos altamente no lineales y subdeterminados.</p>

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2

Diaz, Nandaru, Komang Ngurah Suarbawa, and Adityo Mursitantyo. "Earthquake Relocation in Northern Bali Island in 2015-2017 using Double Difference Method (DD)." BULETIN FISIKA 19, no. 2 (2018): 64. http://dx.doi.org/10.24843/bf.2018.v19.i02.p05.

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A research about earthquake relocation in Northern Bali Island in 2015 – 2017 using the Double Difference (DD) method has been carried out. Earthquake relocation is important to get some informations about earthquake locations with high accuracy, fault zone identification, earthquake distribution and seismic analysis. The results of the relocation indicated that there was a displacement of the location of earthquake that formed moving closer to the earthquake source namely a fault. Relocation using HypoDD program gave high accurate result indicated by the RMS residual time value close to zero

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3

Zhou, Lianqing, Cuiping Zhao, Miao Zhang, et al. "Machine-learning-based earthquake locations reveal the seismogenesis of the 2020 Mw 5.0 Qiaojia, Yunnan earthquake." Geophysical Journal International 228, no. 3 (2021): 1637–47. http://dx.doi.org/10.1093/gji/ggab420.

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SUMMARY A moment magnitude (Mw) 5.0 earthquake hit Qiaojia, Yunnan, China on 18 May 2020. Its hypocentre is only approximately 20 km away from the Baihetan reservoir, the second largest hydropower station in China. The Baihetan Reservoir is located at the junction of multiple fault zones on the eastern boundary of the Sichuan-Yunnan rhombic block, an area with high background seismic activity. The Baihetan Reservoir was planned to be impounded in April 2021 and the Mw 5.0 earthquake occurred during its water-retaining. Thus, it is critical to investigate the seismogenesis of the Qiaojia Mw 5.0

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4

Wang, WeiLai, JianPing Wu, LiHua Fang, and ChangZai Wang. "Relocation of the Yushu M S7.1 earthquake and its aftershocks in 2010 from HypoDD." Science China Earth Sciences 56, no. 2 (2012): 182–91. http://dx.doi.org/10.1007/s11430-012-4450-z.

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5

Sinaga, Vania Illona Chrestella, Muhammad Alif Fauzan Aolindar, Muchammad Alifiyansyah Nur Pramudita, Pepen Supendi, Kartika Hajar Kirana, and Mia Uswatun Hasanah. "Relocation of Earthquake Hypocenter Using Double-Difference Method in Western Part of Sumatera." Journal of Physics: Conference Series 2582, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2582/1/012004.

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Abstract The western part of Sumatra has a fairly complex tectonic setting where there is a convergent meeting between the Indo-Australian plate and the Eurasian plate. These plates form a subduction zone and also the Sumatran Fault. The subduction zone and the Sumatran Fault cause many earthquakes in western Sumatra. This study will identify the location of the earthquake hypocenter, which is quite accurately obtained by relocating the hypocenter and making a cross-section in order to analyze the subduction zone and the Sumatran Fault. Hypocenter relocation can be done using the double differ

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6

Purba, Joshua, Ramadhan Priadi, Muhammad Frando, and Imanuela Pertiwi. "The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR." Geoloski anali Balkanskoga poluostrva, no. 00 (2025): 5. https://doi.org/10.2298/gabp250417005p.

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The Purpri Fault, a newly identified active fault in East Kolaka, Indonesia, has been analyzed using an integrated geophysical approach, combining HypoDD earthquake relocation and DInSAR ground deformation analysis. The relocation of 233 seismic events from January 24 to February 7, 2025, revealed a fault structure distinct from the Middle Kolaka and North Kolaka Faults, characterized by an oblique-normal faulting mechanism with a left-lateral component. The focal mechanism solution confirms significant vertical displacement, indicating a fault that accommodates both extensional and shear defo

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7

S, Novita Sari, Mohammad Syamsu Rosid, and Titi Anggono. "Relokasi Hiposenter Double Difference dan Penentuan Model Kecepatan di Jawa Bagian Barat." POSITRON 15, no. 1 (2025): 92–102. https://doi.org/10.26418/positron.v15i1.91097.

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Jawa bagian barat merupakan daerah dengan seismisitas tinggi yang dipengaruhi zona subduksi dua lempeng tektonik. Seismisitas tinggi ini dipengaruhi oleh keberadaan sesar aktif yang beberapa diantaranya belum terpetakan oleh PuSGen. Penelitian ini bertujuan untuk menentukan keberadaan sesar lokal menggunakan lokasi hiposenter yang lebih akurat. Data waktu tiba gelombang P dan S diperoleh dari hasil rekaman 38 stasiun seismik Badan Meteorologi Klimatologi dan Geofisika (BMKG) periode Januari 2010 – Januari 2024. Terhadap 1978 events gempa bumi kerak dangkal (kedalaman ≤50 km) telah dilakukan re

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8

Ma, Shutian, Dariush Motazedian, and Maurice Lamontagne. "Further studies on the 1988 MW 5.9 Saguenay, Quebec, earthquake sequence." Canadian Journal of Earth Sciences 55, no. 10 (2018): 1115–28. http://dx.doi.org/10.1139/cjes-2017-0231.

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Many small earthquakes occur annually in Eastern Canada, but moderate to strong earthquakes are infrequent. The 25 November 1988 MW 5.9 Saguenay mainshock remains the largest earthquake in the last 80 years in eastern North America. In this article, some aspects of that earthquake sequence were re-analyzed using several modern methods. The regional depth-phase modeling procedure was used to refine the focal depths for the foreshock, the aftershocks, and other MN ≥ 2.5 regional earthquakes. The hypocenters of 10 earthquakes were relocated using hypoDD. The spatial distribution of eight relocate

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9

Li, Jun, Ming Hao, and Zijian Cui. "A High-Resolution Aftershock Catalog for the 2014 Ms 6.5 Ludian (China) Earthquake Using Deep Learning Methods." Applied Sciences 14, no. 5 (2024): 1997. http://dx.doi.org/10.3390/app14051997.

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A high-resolution catalog for the 2014 Ms 6.5 Ludian aftershocks was constructed based on the deep learning phase-picking model (CERP) and seismic-phase association technology (PALM). A specific training strategy, which combines the advantages of the conventional short–long window average energy ratio algorithm (STA/LTA) and AI algorithms, is employed to retrain the CERP model. The P- and S-wave phases were accurately detected and picked on continuous seismic waveforms by the retained AI model. Hypoinverse and HypoDD were utilized for the precise location of 3286 events. Compared to the previo

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10

Novita, Sari Priyanto Putri, Yuliyanto Gatot, and Harmoko Udi. "Swarm Earthquake Hypocenter Relocation in Ambarawa 22 October – 24 November 2021 using Double Difference Method." Cognizance Journal of Multidisciplinary Studies (CJMS) 3, no. 5 (2023): 64–69. https://doi.org/10.47760/cognizance.2023.v03i05.006.

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<strong><em>The swarm earthquake that occurred in Ambarawa from October 22 to November 24, 2021, was an earthquake with a relatively small magnitude and occurred repeatedly over a certain time span, which is commonly called an earthquake swarm. Disaster mitigation efforts needs to be carried out considering that the area most of the tourist destinations. To assist disaster mitigation efforts, it is necessary to relocate the hypocenter. The relocation of the hypocenter itself aims to obtain an earthquake hypocenter position that has a higher level of accuracy by taking into account the RMS </em

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11

Irma Putri, Devi, I. Ketut Sukarasa, Rudy Darsono, Winardi Tjahyo Baskoro, Ni Nyoman Wendri, and I. Made Satriya Wibawa. "Relocation of Earthquakes Hypocenter Using the Double Difference Method in Bali and Its Surrounding Areas." BULETIN FISIKA 25, no. 2 (2024): 168. http://dx.doi.org/10.24843/bf.2024.v25.i02.p04.

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A study on the relocation of earthquake hypocenters using the Double Difference method has been conducted in Bali and its surrounding areas. This research was carried out at the Center for Meteorology, Climatology, and Geophysics Region III Denpasar. The purpose of this study is to find out the distribution of earthquake hypocenters before and after the relocation and to know the continuity of earthquake hypocenters in the Bali region. The data used are arrival time data of 1,815 earthquake events from January 1, 2014 to December 31, 2023, and data from 26 earthquake recording stations. The re

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12

Putri, Novita Sari Priyanto, Gatot Yuliyanto, and Udi Harmoko. "Swarm Earthquake Hypocenter Relocation in Ambarawa 22 October – 24 November 2021 using Double Difference Method." Cognizance Journal of Multidisciplinary Studies 3, no. 5 (2023): 64–69. http://dx.doi.org/10.47760/cognizance.2023.v03i05.006.

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The swarm earthquake that occurred in Ambarawa from October 22 to November 24, 2021, was an earthquake with a relatively small magnitude and occurred repeatedly over a certain time span, which is commonly called an earthquake swarm. Disaster mitigation efforts needs to be carried out considering that the area most of the tourist destinations. To assist disaster mitigation efforts, it is necessary to relocate the hypocenter. The relocation of the hypocenter itself aims to obtain an earthquake hypocenter position that has a higher level of accuracy by taking into account the RMS (Root Mean Squar

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13

Syafriani, Furqon Dawam Raharjo, Suaidi Ahadi, and Mohamad Ramdhan. "Study of Seismicity Based on the Results of Hypocenter Relocation Using Double Difference (HypoDD) Method in West Sumatera and Its Surrounding." Jurnal Penelitian Pendidikan IPA 9, no. 7 (2023): 5150–56. http://dx.doi.org/10.29303/jppipa.v9i7.3792.

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The presence of the Indo-Australian plate, the Eurasian plate and the active Sumatra fault zone makes the West Sumatra region and its surroundings have very high seismic activity. To describe the seismicity pattern, it is necessary to analyze the earthquake hypocenter relocation, one of which is using the double difference (hypoDD) method. This method basically uses the data residual travel time from each hypocenter pair to the earthquake seismic station. The purpose of this research is to analyze the relocation of the hypocenter and describe the seismicity pattern in the West Sumatra and surr

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14

Rendina, Domenico, Renato Ippolito, Lanfranco D’Elia, et al. "Hypovitaminosis D and Organ Damage In Patients With Arterial Hypertension: A Multicenter Double Blind Randomised Controlled Trial of Cholecalciferol Supplementation (HYPODD)." High Blood Pressure & Cardiovascular Prevention 22, no. 2 (2015): 135–42. http://dx.doi.org/10.1007/s40292-015-0080-9.

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15

Karamanos, Ch K., V. G. Karakostas, L. Seeber, E. E. Papadimitriou, and A. A. Kilias. "RECENT SEISMIC ACTIVITY IN CENTRAL GREECE REVEALING LOCAL SEISMOTECTONIC PROPERTIES." Bulletin of the Geological Society of Greece 43, no. 4 (2017): 2075. http://dx.doi.org/10.12681/bgsg.11397.

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The December 2008, M=5.2 earthquake occurred in the Voiotikos–Kifissos basin near the town of Amfikleia in Central Greece and was followed by an intense sequence with hundreds of earthquakes. Mainshock source characteristics derived from the recordings of the Greek National Seismological Network are consistent with previous known earthquakes as well as with the current nearly N–S extensional regime. The adequate azimuthal coverage and the calculated time residuals at each seismological station ensure high location accuracy, whereas the stations operated close to the seismic excitations constra

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16

Meidji, Icha Untari, Jajat Jatnika, Lukman Samatowa, et al. "Analyzing Seismicity Pattern of the Gorontalo Region and Its Surroundings in the Form of Hypocenter Relocation Using Double Difference Method." Jurnal Penelitian Pendidikan IPA 9, no. 10 (2023): 8581–87. http://dx.doi.org/10.29303/jppipa.v9i10.5400.

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The level of seismic activity due to earthquake events in Gorontalo is strongly influenced by the tectonic system model of the Gorontalo region and the presence of a subduction zone in the Sulawesi Sea. These characteristics make the Gorontalo region have high seismic activity. To describe the pattern of seismicity in the Gorontalo region, it is necessary to conduct an analysis in the form of earthquake hypocenter relocation using the double difference (hypoDD) method. This method uses residual travel time data from each pair of hypocenters to the recording station. This study aims to analyze

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17

Zhang, Miao, William L. Ellsworth, and Gregory C. Beroza. "Rapid Earthquake Association and Location." Seismological Research Letters 90, no. 6 (2019): 2276–84. http://dx.doi.org/10.1785/0220190052.

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ABSTRACT Rapid association of seismic phases and event location are crucial for real‐time seismic monitoring. We propose a new method, named rapid earthquake association and location (REAL), for associating seismic phases and locating seismic events rapidly, simultaneously, and automatically. REAL combines the advantages of both pick‐based and waveform‐based detection and location methods. It associates arrivals of different seismic phases and locates seismic events primarily through counting the number of P and S picks and secondarily from travel‐time residuals. A group of picks are associate

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18

Cirillo, Daniele, Cristina Totaro, Giusy Lavecchia, et al. "Structural complexities and tectonic barriers controlling recent seismic activity in the Pollino area (Calabria–Lucania, southern Italy) – constraints from stress inversion and 3D fault model building." Solid Earth 13, no. 1 (2022): 205–28. http://dx.doi.org/10.5194/se-13-205-2022.

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Abstract. We reconstruct the 3D fault model of the structures causative of the 2010–2014 Pollino seismic activity by integrating structural–geological and high-resolution seismological data. We constrained the model at the surface with fault-slip data, and at depth, by using the distributions of selected high-quality relocated hypocenters. Relocations were performed through the non-linear Bayloc algorithm, followed by the double-difference relative location method HypoDD applied to a 3D P-wave velocity model. Geological and seismological data highlight an asymmetric active extensional fault sy

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19

Gunnels, Michael, Gurban Yetrimishli, Sabina Kazimova, and Eric Sandvol. "Seismotectonic evidence for subduction beneath the Eastern Greater Caucasus." Geophysical Journal International 224, no. 3 (2020): 1825–34. http://dx.doi.org/10.1093/gji/ggaa522.

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SUMMARY We generated high-resolution 3-D seismic velocity models as well as a relocated earthquake catalogue across the eastern Greater Caucasus and Kura basins. This work was done using data from the recently upgraded Republic Seismological Survey Center's (RSSC) seismic network. We generated our tomographic images of crustal velocity structure in Azerbaijan using double-difference inversions (i.e. tomoDD and hypoDD). Earthquake catalogues from the RSSC between 2011 and 2016 were used; these catalogues include absolute arrival times of 103 288 P- and 120 952 S-wave traveltime picks for 7574 e

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20

Daniarsyad, Gatut, Priyobudi Priyobudi, Aprilia Puspita Cahyaningrum, et al. "Analysis on the Causative Fault of the 2021 Mw 6.0 Tehoru Earthquake in the South Coast of Seram Island: A Preliminary Result." E3S Web of Conferences 447 (2023): 01020. http://dx.doi.org/10.1051/e3sconf/202344701020.

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Seram Island is the northern part of the Banda subduction which is characterized by the existence of a thrust fault structure in the Seram Trough as the main contributor to seismicity in this region. Complex tectonic activity also forms a deformation zone of the Kawa Fault with a sinistral strike slip mechanism and high-angle normal faults in the mainland. On June 16, 2021 a Mw 6.0 earthquake occurred on the south coast of Seram, in Tehoru to be precise, which followed by a small tsunami wave which is thought to have been generated by an underwater landslide. This earthquake has a normal fault

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21

Yang, Hong Bin, Xiao Hong Wang, and Zong De Fang. "Comparison Experiment for Two Kinds of Hypoid Gear Drives." Applied Mechanics and Materials 20-23 (January 2010): 1385–90. http://dx.doi.org/10.4028/www.scientific.net/amm.20-23.1385.

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To develop a good quality of hypoid gear drive, the authors test the vibration and noise of two kinds of hypoid gear drives under different working conditions. The test object is a pair of hypoid gear drive used in the back axle of one minivan and a designed hypoid gear drive with high teeth based on the former. The results indicate that the hypoid gear drive with high teeth has lower vibration and noise.

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Wang, Pei Yu, and Zhang Hua Fong. "Mathematical Transformation of Machine Settings from Cradle-Type to Cartesian-Type Hypoid Generator." Key Engineering Materials 419-420 (October 2009): 365–68. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.365.

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A mathematical model for translating machine settings from universal Cradle-Type hypoid generator to Cartesian-Type hypoid generator is proposed in this paper. A mathematical model of universal Cradle-Type hypoid generator was proposed by Fong [12] to simulate conventional hypoid generators including face milling and face hobbing machines. A few years ago, the Gleason Works presented the Phoenix hypoid generator, which is a Cartesian-Type machine, and the machine is gaining good commercial success. Therefore, we proposed a mathematical transformation model to translate the machine settings fro

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Kim, Tong Min, Hyunah Kim, Seung-Hwan Lee, et al. "Characteristics of Hypoglycemic Diabetic Patients Visiting the Emergency Room." Cardiovascular Therapeutics 2020 (July 26, 2020): 1–9. http://dx.doi.org/10.1155/2020/3612607.

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Introduction. Severe hypoglycemia can be life-threatening; therefore, it is important to identify the characteristics of the hypoglycemic patients. The aim of this study is to analyze the type and characteristics of diabetic patients with hypoglycemia who visited an emergency room. Methods. We included diabetic patients with hypoglycemia who visited the emergency room of St. Mary’s Hospital in Seoul from January 2009 to August 2018 in the study. Hypo_S group patients visited the emergency room once whereas Hypo_M group patients visited twice or more. We also compared the incidence of cardiovas

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24

Samira Khanahmedova, Ayshad Mammadov, Samira Khanahmedova, Ayshad Mammadov. "APPLICATION OF HYPOID TRANSMISSION IN HYBRID ELECTRIC MACHINES." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 49, no. 02 (2025): 71–81. https://doi.org/10.36962/pahtei49022025-71.

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The article discusses the use of a hypoid gear, which is used in mechanisms where the axes of rotation of the gear and wheel do not intersect, but are displaced. These gears are different from ordinary gears with straight or tapered teeth, where the axes of rotation intersect. Hypoid gears are widely used in car transmissions, especially on the rear and front axles. In these gears, the hypoid wheel interacts with the hypoid gear, creating a specific tooth trajectory and allowing torque to be transferred between the misaligned axes. The main characteristics of hypoid gear are given, such as the

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25

Yu, Li Juan, Zhao Jun Yang, and Xu Peng Li. "Theoretical Analysis on Manufacturing Hypoid Left-Hand Gears by Generating-Line Method." Advanced Materials Research 690-693 (May 2013): 3032–35. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3032.

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According to the hypoid gear tooth surface forming principle, a generating-line will be formed in round-plane while a cone and its tangent circle plane do pure rolling, and the hypoid gear is cutting according to the motion equation as hypoid gears generating-line. to tools shape. The milling processing equation of the hypoid left-hand gear tooth surface on the right side gear tooth surface and on the left side gear tooth surface.There are a detailed description of the adjusting-tool , cutting out from ends, dividing, cycle cutting the whole process. The above method can realizes hypoid gearwh

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Li, Huibin, Huichao Gao, Yue Zhang, and Dequan Jin. "Nonlinear vibration of hypoid gear with backlash." Journal of Vibroengineering 18, no. 2 (2016): 1243–53. http://dx.doi.org/10.21595/jve.2015.16281.

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Due to the machining errors, alignment error, wear, tear and time varying stiffness of hypoid teeth, the vibration of hypoid gears is inevitably produced in the course of working, and its vibration and noise is the main sources of vibration and noise in the automobile transmission. Study on nonlinear vibration and noise of the hypoid gear pair, and investigating on reducing its vibration and noise are of great significance. Firstly, a simplified nonlinear vibration model of the hypoid gears of main reducer, with considering the time-varying teeth stiffness and teeth surface friction damping, w

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Heinemann, Lutz, Dorothee Deiss, Norbert Hermanns, et al. "HypoDE." Journal of Diabetes Science and Technology 9, no. 3 (2015): 651–62. http://dx.doi.org/10.1177/1932296815575999.

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Yang, Man, Hui Bin Li, and Bao Yun Xu. "Hypoid Gear Three-Dimensional Modeling with Pro/E." Advanced Materials Research 915-916 (April 2014): 236–39. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.236.

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For hypoid gear which processed by HFT (hypoid gear formate tilt) method, geometry parameters and machining parameters of hypoid gear were calculated by using Gleason card. According to the actual machining process and meshing principle, tooth surface equation was derived by coordinate transformation. Then the discrete coordinates points of tooth surface were obtained by using MATLAB tools and projection transformation principle, and data were saved in ibl format. At last the 3-demensional model of hypoid gear were established by importing the ibl format data in Pro/e.

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Huang, Dequan, Yan Li, Xingyuan Zheng, and Gang Li. "Study on Dynamic Behaviors of Hypoid Gears Under Variable Tidal Current Energy Harvesting Conditions." Machines 13, no. 3 (2025): 178. https://doi.org/10.3390/machines13030178.

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This study investigates dynamic behaviors of hypoid gear rotor systems under variable tidal current energy harvesting conditions through numerical simulations and experimental validation. The study examines dynamic responses of a hypoid gear rotor system induced by cyclical tidal current variations, which generate fluctuating loads and bidirectional rotational speeds in tidal energy conversion systems. Two hypoid gear pairs, modified through precise manufacturing parameters, are evaluated to optimize tooth contact patterns for bidirectional tidal loading conditions. A coupled torsional vibrati

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Fan, Qi. "Advanced Developments in Computerized Design and Manufacturing of Spiral Bevel and Hypoid Gear Drives." Applied Mechanics and Materials 86 (August 2011): 439–42. http://dx.doi.org/10.4028/www.scientific.net/amm.86.439.

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Design and manufacturing of spiral bevel and hypoid gears is highly complicated and has to be based on the employment of computerized tools. This paper comprehensively describes the latest developments in computerized modeling of tooth surface generation, flank form error correction, ease-off calculation, and tooth contact analysis for spiral bevel and hypoid gears. Accordingly, advanced software programs for computerized design and manufacturing of hypoid gears are developed.

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Nie, Li Xin, and Li Mei Zhang. "Digitalization and Meshing Performance Analysis on Tooth Surfaces of Hypoid Gear." Applied Mechanics and Materials 42 (November 2010): 224–27. http://dx.doi.org/10.4028/www.scientific.net/amm.42.224.

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Digitized hypoid gear’s surface model, which is constructed by NURBS method, can set free the constraints of conventional processing technique in the process of designing and manufacturing hypoid gear. The digitalization of tooth surfaces of hypoid gears consists of three parts: building large gear’s NURBS model, calculating small tooth surface’s character parameters based on actual requirements and small tooth surface’s digitalization. The digitalization of tooth surfaces can be realized by machining simulation, and the key points are how to establish equations of cutter head and grids of gea

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Fong, Zhang-Hua. "Mathematical Model of Universal Hypoid Generator With Supplemental Kinematic Flank Correction Motions." Journal of Mechanical Design 122, no. 1 (2000): 136–42. http://dx.doi.org/10.1115/1.533552.

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A mathematical model of universal hypoid generator is proposed to simulate virtually all primary spiral bevel and hypoid cutting methods. The proposed mathematical model simulates the face-milling, face-hobbing, plunge cutting, and bevel-worm-shaped hobbing processes with either generating or nongenerating cutting for the spiral bevel and hypoid gears. The supplemental kinematic flank correction motions, such as modified generating roll ratio, helical motion, and cutter tilt are included in the proposed mathematical model. The proposed mathematical model has more flexibility in writing compute

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Zhu, Xiu Rong. "Study on the NC Machining Theory and Simulation of Hypoid Gear." Applied Mechanics and Materials 539 (July 2014): 34–37. http://dx.doi.org/10.4028/www.scientific.net/amm.539.34.

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Based on NC machining principle of hypoid gears and NC machining with high efficiency quality, This paper discusses the feasibility of the hypoid gear processing, establishes the mathematical model of face gear wheel hypoid milling machining adjustment, that will be take the basic data into vertical machining center machine tool, tool, fixture, the installation and adjustment of parameters, and we write a program of the CNC machining and corresponding code, combined with the specific wheel blank parameters to milling simulation test and milling tests, we obtain a new process methods.

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Wang, Li Mei. "Study on the Processing and Simulation of End-Gear Based on CNC Theory." Applied Mechanics and Materials 608-609 (October 2014): 77–80. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.77.

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Based on NC machining principle of hypoid gears and NC machining with high efficiency quality, This paper discusses the feasibility of the hypoid gear processing, establishes the mathematical model of face gear wheel hypoid milling machining adjustment, that will be take the basic data into vertical machining center machine tool. Through analyze the principle of the oscillating tooth face gear transmission, and compared the structure differences between face gear and bevel gear, and the realization processing method of face gear is discussed by improving the bevel gear shaper.

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Yan, Hua Ru, and Miao Xin Xiao. "Study of V/H/J of Pointing-Lapping for Hypoid Gears." Applied Mechanics and Materials 300-301 (February 2013): 217–20. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.217.

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Pointing-lapping is a lapping way for modifying tooth surface defects of hypoid gears. For numerical control, V/H/J calculation principle of pointing-lapping of hypoid gears is introduced. According to mesh relations and coordinate relations, 8 nonlinear equations are formed on the basis of mesh theory of hypoid gears. V/H/J can be got by solving the nonlinear equations, which can be finished easily by computation program. The accuracy of the calculation principle has been proved by tooth surface contact pattern test in Y9550 roll checking machine.

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Xu, H., and A. Kahraman. "Prediction of friction-related power losses of hypoid gear pairs." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 221, no. 3 (2007): 387–400. http://dx.doi.org/10.1243/14644193jmbd48.

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A model to predict friction-related mechanical efficiency losses of hypoid gear pairs is proposed in this study. The model includes a gear contact model, a friction prediction model, and a mechanical efficiency formulation. The friction model uses a friction coefficient formula obtained by applying multiple linear regression analysis to a large number of elastohydrodynamic lubrication analyses covering typical ranges of key parameters associated with surface roughness, geometry, load, kinematics, and the lubricant. Formulations regarding the kinematic and geometric properties of the hypoid gea

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Gonzalez-Perez, Ignacio, and Alfonso Fuentes-Aznar. "An exact system of generation for face-hobbed hypoid gears: Application to high reduction hypoid gear drives." Mechanism and Machine Theory 179, no. 105115 (2023): 1–18. https://doi.org/10.1016/j.mechmachtheory.2022.105115.

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The determination of the pitch cones for hypoid gears is already well defined either through numerical methods as those shown in the Standard ANSI/AGMA ISO 23509-B17 or through algorithms available in the specialized literature. However, a procedure to determine the gear tooth surfaces for hypoid gears directly from their pitch cones is still missing. An analytical approach to determine the basic machine-tool settings for the pinion and the wheel of hypoid gear drives is proposed here. It is based on the condition of exact generation, which means that the gears will operate under conjugate con

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Mohammadpour, M., S. Theodossiades, H. Rahnejat, and D. Dowson. "Non-Newtonian mixed thermo-elastohydrodynamics of hypoid gear pairs." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 9 (2017): 1105–25. http://dx.doi.org/10.1177/1350650117700756.

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Transmission efficiency is the main objective in the development of vehicular differential systems, comprising hypoid gear pairs. The overall aim is to contribute to improved vehicle fuel efficiency and thus levels of harmful emissions for modern desired eco-drive axles. Detailed predictive analysis plays an important role in this quest, particularly under realistic operating conditions, comprising high contact loads and shear rates. Under these conditions, the hypoid gear pairs are subject to mixed non-Newtonian thermo-elastohydrodynamic conditions, which is the approach undertaken in this pa

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Le, H. K. "A Study on the Influence of Plasma Nitriding Technology Parameters on the Working Surface Deformation of Hypoid Gears." Engineering, Technology & Applied Science Research 12, no. 6 (2022): 9760–65. http://dx.doi.org/10.48084/etasr.5365.

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This paper presents the results of the research on the influence of plasma nitriding technology parameters on the working surface deformation of hypoid gears. Blue light technology with non-contact measuring devices is used to determine the working surface deformation of hypoid gears after plasma nitriding. The study has determined a regression equation showing the influence of plasma nitriding technology parameters on the deformation of the working surface of the hypoid gear. The minimum deformation optimization value at the planning area is 0.0071746 at permeation temperature TL=4.89oC, perm

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Wang, Xing, Zong De Fang, and Sheng Jin Li. "The Influence Caused by each Assembly Misalignment on the HGT Hypoid Gear's Meshing Performance." Applied Mechanics and Materials 538 (April 2014): 122–26. http://dx.doi.org/10.4028/www.scientific.net/amm.538.122.

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The assembly misalignment is the key factor that influences the meshing performance of gear, the meshing performance worked on no-load or light load conditions is more completely expressed by contact pattern and transmission error. According to the contact pattern and transmission error, the influence of assembly misalignment to the meshing performance of hypoid gear is studied, this method break the limitations relying on experience to adjust the installation. Based on the machining principle and method of Gleason hypoid gears which machined by the HGT method, the mathematical model of machin

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Pellkofer, J., I. Boiadjiev, D. Kadach, M. Klein, and K. Stahl. "New calculation method for the scuffing load-carrying capacity of bevel and hypoid gears." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 21-22 (2019): 7328–37. http://dx.doi.org/10.1177/0954406219843954.

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Future trends indicate that the demands on bevel and hypoid gears for higher power transmission and lower weight are continuously increasing. Beside typical fatigue failures such as pitting, tooth root breakage, and tooth flank fracture, spontaneous failures such as scuffing are often observed if the load-carrying capacity of the tribological system consisting of gears and lubricant is exceeded. This paper gives an overview of the newest findings on scuffing specifically on bevel and hypoid gears and discusses the hypoid-specific decisive influence parameters. Furthermore, the newly developed

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Li, Jubo, Weihao Sun, Yan Zhao, et al. "A Bootstrap-Based Tooth Surface Errors Statistics Methodology for Batch Hypoid Gears after Heat Treatment." Processes 11, no. 4 (2023): 1128. http://dx.doi.org/10.3390/pr11041128.

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In the manufacturing and production of hypoid gears, it is a necessary key problem to improve the tooth surface heat treatment precision and production efficiency of the hypoid gears. How to use advanced statistical theory and methods to evaluate the whole batch machining quality of the tooth surface after heat treatment is particularly urgent. In this connection, for the same batch of hypoid gears with the same gear material, numerical control gear milling method, and heat treatment specifications, a bootstrap-based statistics scheme of tooth surface errors after heat treatment is proposed in

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Shih, Yi-Pei, Zhang-Hua Fong, and Grandle C. Y. Lin. "Mathematical Model for a Universal Face Hobbing Hypoid Gear Generator." Journal of Mechanical Design 129, no. 1 (2006): 38–47. http://dx.doi.org/10.1115/1.2359471.

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Based on the theory of gearing and differential geometry, a universal hypoid generator mathematical model for face hobbing spiral bevel and hypoid gears has been developed. This model can be used to simulate existing face hobbing processes, such as Oerlikon’s Spiroflex© and Spirac© methods, Klingelnberg’s Cyclo-Palloid© cutting system, and Gleason’s face hobbing nongenerated and generated cutting systems. The proposed model is divided into three modules: the cutter head, the imaginary generating gear, and the relative motion between the imaginary generating gear and the work gear. With such a

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Shih, Yi-Pei, and Zhang-Hua Fong. "Flank Modification Methodology for Face-Hobbing Hypoid Gears Based on Ease-Off Topography." Journal of Mechanical Design 129, no. 12 (2006): 1294–302. http://dx.doi.org/10.1115/1.2779889.

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The fundamental design of spiral bevel and hypoid gears is usually based on a local synthesis and a tooth contact analysis of the gear drive. Recently, however, several flank modification methodologies have been developed to reduce running noise and avoid edge contact in gear making, including modulation of tooth surfaces under predesigned transmission errors. This paper proposes such a flank modification methodology for face-hobbing spiral bevel and hypoid gears based on the ease-off topography of the gear drive. First, the established mathematical model of a universal face-hobbing hypoid gea

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Simon, Vilmos. "Optimal Tooth Modifications in Hypoid Gears." Journal of Mechanical Design 127, no. 4 (2004): 646–55. http://dx.doi.org/10.1115/1.1899177.

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A method for the determination of optimal tooth modifications in hypoid gears based on improved load distribution and reduced transmission errors is presented. The modifications are introduced into the pinion tooth surface by using a cutter with bicircular profile and optimal diameter. In the optimization of tool parameters the influence of shaft misalignments of the mating members is included. As the result of these modifications a point contact of the meshed teeth surfaces appears instead of line contact; the hypoid gear pair becomes mismatched. By using the method presented in (Simon, V., 2

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Li, Gang, Zhonghou Wang, and Aizoh Kubo. "Error-sensitivity analysis for hypoid gears using a real tooth surface contact model." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 3 (2016): 507–21. http://dx.doi.org/10.1177/0954406215616835.

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Accurately and rapidly evaluated error sensitivity of actual tooth surfaces of hypoid gears can be a significant foundation for a variety of dynamic preference analysis and machine tool setting readjustments. Due to the complexity of local geometric features as well as the limitations of the data measurement on tooth surfaces of hypoid gears, automated error-sensitivity analysis for actual tooth surfaces still presents many substantial challenges. This paper presents a novel methodology for the error-sensitivity analysis of real tooth surfaces of hypoid gears. The methodology combines an error

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Wang, Wen Jin, Zhi Qiang Zhang, Jing Zhang, Jian Zhao, Ling Li Zhang, and Tai Yong Wang. "Computerized Modeling and CNC Machining Simulation of Spiral Bevel Gear." Advanced Materials Research 482-484 (February 2012): 1081–84. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1081.

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Based on the theory of gearing and differential geometry, a CNC hypoid generator mathematical model for spiral bevel has been developed. A mathematical model of a spiral bevel gear-tooth surface based on the CNC Gleason hypoid gear generator mechanism is proposed in the paper. The simulation of the spiral bevel gear is presented according to the developed machining mathematical model. A numerical example is provided to illustrate the implementation of the developed mathematic models.

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Yang, Zhao Jun, Yan Kun Wang, Li Nan Li, and Xue Cheng Zhang. "Optimization of Substituted Generating Lines of Cutting Hypoid Gears by Generating-Line Method." Advanced Materials Research 712-715 (June 2013): 1718–23. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1718.

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In order to make the substituted circular arc generating lines be a series easily, based on the principles of cutting hypoid gears by generating-line method and the pinion generating lines substituting method, an optimization which the objective was to make the substituted circular arc generating lines radiuses of pinion be integers or approximate integers was proposed. The feasibility of this optimization method was verified by the calculating example of a pair of hypoid gears.

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Fan, Qi. "Enhanced Algorithms of Contact Simulation for Hypoid Gear Drives Produced by Face-Milling and Face-Hobbing Processes." Journal of Mechanical Design 129, no. 1 (2006): 31–37. http://dx.doi.org/10.1115/1.2359475.

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Modeling of tooth surface generation and simulation of contact is an important part of computerized design and manufacturing of spiral bevel and hypoid gears. This paper presents new developments in this subject. Specifically, the paper covers: (i) development of a generic model of tooth surface generation for spiral bevel and hypoid gears produced by face-milling and face-hobbing processes conducted on free-form computer numerical control (CNC) hypoid gear generators which are incorporated with the Universal Motions Concept (UMC); (ii) a modified algorithm of tooth contact simulation with red

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Jia, Xin Jie, Xiao Zhong Deng, and Xiao Zhong Ren. "Multi-Toothed Milling Force Model and Simulation for Form Milling the Gear of the Hypoid Gears." Advanced Materials Research 328-330 (September 2011): 90–95. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.90.

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Prediction of the forces in milling hypoid gear was often needed in order to establish automation and optimization of the tooth-milling processes. Based on the geometrical theory of the format face-milling, the multi-toothed milling forces theoretical model for form milling the gear of the hypoid gears is presented, the milling force factors were calibrated via single factor experiments and the simulation programs were prepared. Experiments were carried out to verify the availability of the multi-toothed dynamic milling force model, the experimental results is consistent with the simulation re

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