{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:WT7GVNASMO5WVRQVPNCL5TE2NP","short_pith_number":"pith:WT7GVNAS","canonical_record":{"source":{"id":"physics/0701032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.class-ph","submitted_at":"2007-01-03T09:55:29Z","cross_cats_sorted":[],"title_canon_sha256":"43f5dd72977c814c86c72f8f18fa81ee6eae5d0ce655892512501bc3d1a29866","abstract_canon_sha256":"82b997f71b1ea5c773b9242bfb8877091b476e80f55d86ab0bea91e6a64c8e0b"},"schema_version":"1.0"},"canonical_sha256":"b4fe6ab41263bb6ac6157b44becc9a6bd41ba7d61602e662831cda2380c18fc9","source":{"kind":"arxiv","id":"physics/0701032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0701032","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0701032v1","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0701032","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"pith_short_12","alias_value":"WT7GVNASMO5W","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"WT7GVNASMO5WVRQV","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"WT7GVNAS","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:WT7GVNASMO5WVRQVPNCL5TE2NP","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0701032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.class-ph","submitted_at":"2007-01-03T09:55:29Z","cross_cats_sorted":[],"title_canon_sha256":"43f5dd72977c814c86c72f8f18fa81ee6eae5d0ce655892512501bc3d1a29866","abstract_canon_sha256":"82b997f71b1ea5c773b9242bfb8877091b476e80f55d86ab0bea91e6a64c8e0b"},"schema_version":"1.0"},"canonical_sha256":"b4fe6ab41263bb6ac6157b44becc9a6bd41ba7d61602e662831cda2380c18fc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:14.749284Z","signature_b64":"dZrs5sSx1d7n2Hl3FIBldeShld30xqrAVHP600DzQtaZ1lKkPvr4hGFLjVhJTpTJ+/eujXLSGzRybOVkxGLxDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4fe6ab41263bb6ac6157b44becc9a6bd41ba7d61602e662831cda2380c18fc9","last_reissued_at":"2026-05-18T01:09:14.748624Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:14.748624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0701032","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hst3956uU6ivpl1SrFDUiyeQYmKqqXiIq2jT6W+PNvaKIbXqrjsg8VCtJO6BRKeAXjeENv3mh46ITbQFv5v3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:20:30.529092Z"},"content_sha256":"3ab69b90b6a6a0f842eb5dc3772975a04898d2d211cc4e7506957dd4077b2767","schema_version":"1.0","event_id":"sha256:3ab69b90b6a6a0f842eb5dc3772975a04898d2d211cc4e7506957dd4077b2767"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:WT7GVNASMO5WVRQVPNCL5TE2NP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experiments and numerical results on nonlinear vibrations of an impacting hertzian contact. Part 1: harmonic excitation","license":"","headline":"","cross_cats":[],"primary_cat":"physics.class-ph","authors_text":"Emmanuel Rigaud (LTDS), Jo\\\"el Perret-Liaudet (LTDS)","submitted_at":"2007-01-03T09:55:29Z","abstract_excerpt":"The purpose of this paper is to investigate experimental and numerical dynamic responses of a preloaded vibro-impacting Hertzian contact under sinusoidal excitation. Dynamic response under random excitation is analysed in the second part of this paper. A test rig is built corresponding to a double sphere-plane contact preloaded by the weight of a moving cylinder. Typical response curves are obtained for several input levels. Time traces and spectral contents are explored. Both amplitude and phase of harmonics of the dynamic response are investigated. Linearised resonance frequency and damping "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0701032","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PbfcxQPGZVNt5Z08h3mLPO3RmgSJ6ScA4IXngaYA9gtsq1h5/7fOI6KjRcCBo+nvsca1w2LDUP/1zxbXVuNADQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:20:30.529450Z"},"content_sha256":"2b5ef4fc30572594a20362ac2c74bfa4afc4d896764fc770fae785d966081ada","schema_version":"1.0","event_id":"sha256:2b5ef4fc30572594a20362ac2c74bfa4afc4d896764fc770fae785d966081ada"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/bundle.json","state_url":"https://pith.science/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-24T05:20:30Z","links":{"resolver":"https://pith.science/pith/WT7GVNASMO5WVRQVPNCL5TE2NP","bundle":"https://pith.science/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/bundle.json","state":"https://pith.science/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WT7GVNASMO5WVRQVPNCL5TE2NP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:WT7GVNASMO5WVRQVPNCL5TE2NP","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"82b997f71b1ea5c773b9242bfb8877091b476e80f55d86ab0bea91e6a64c8e0b","cross_cats_sorted":[],"license":"","primary_cat":"physics.class-ph","submitted_at":"2007-01-03T09:55:29Z","title_canon_sha256":"43f5dd72977c814c86c72f8f18fa81ee6eae5d0ce655892512501bc3d1a29866"},"schema_version":"1.0","source":{"id":"physics/0701032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0701032","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0701032v1","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0701032","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"pith_short_12","alias_value":"WT7GVNASMO5W","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"WT7GVNASMO5WVRQV","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"WT7GVNAS","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:2b5ef4fc30572594a20362ac2c74bfa4afc4d896764fc770fae785d966081ada","target":"graph","created_at":"2026-05-18T01:09:14Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The purpose of this paper is to investigate experimental and numerical dynamic responses of a preloaded vibro-impacting Hertzian contact under sinusoidal excitation. Dynamic response under random excitation is analysed in the second part of this paper. A test rig is built corresponding to a double sphere-plane contact preloaded by the weight of a moving cylinder. Typical response curves are obtained for several input levels. Time traces and spectral contents are explored. Both amplitude and phase of harmonics of the dynamic response are investigated. Linearised resonance frequency and damping ","authors_text":"Emmanuel Rigaud (LTDS), Jo\\\"el Perret-Liaudet (LTDS)","cross_cats":[],"headline":"","license":"","primary_cat":"physics.class-ph","submitted_at":"2007-01-03T09:55:29Z","title":"Experiments and numerical results on nonlinear vibrations of an impacting hertzian contact. Part 1: harmonic excitation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0701032","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:3ab69b90b6a6a0f842eb5dc3772975a04898d2d211cc4e7506957dd4077b2767","target":"record","created_at":"2026-05-18T01:09:14Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"82b997f71b1ea5c773b9242bfb8877091b476e80f55d86ab0bea91e6a64c8e0b","cross_cats_sorted":[],"license":"","primary_cat":"physics.class-ph","submitted_at":"2007-01-03T09:55:29Z","title_canon_sha256":"43f5dd72977c814c86c72f8f18fa81ee6eae5d0ce655892512501bc3d1a29866"},"schema_version":"1.0","source":{"id":"physics/0701032","kind":"arxiv","version":1}},"canonical_sha256":"b4fe6ab41263bb6ac6157b44becc9a6bd41ba7d61602e662831cda2380c18fc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4fe6ab41263bb6ac6157b44becc9a6bd41ba7d61602e662831cda2380c18fc9","first_computed_at":"2026-05-18T01:09:14.748624Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:14.748624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dZrs5sSx1d7n2Hl3FIBldeShld30xqrAVHP600DzQtaZ1lKkPvr4hGFLjVhJTpTJ+/eujXLSGzRybOVkxGLxDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:14.749284Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0701032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ab69b90b6a6a0f842eb5dc3772975a04898d2d211cc4e7506957dd4077b2767","sha256:2b5ef4fc30572594a20362ac2c74bfa4afc4d896764fc770fae785d966081ada"],"state_sha256":"6032ab514a86051f349b64cdc1a85835d712afbf4e8b4dd8ee806007458e01c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MiBKkw+J2uizCLR+WIX7XpCfqa9ShVTiwiry8R0mDrfcw/j+QNk5BrjYZk1XncPDbTH+mw4GbxXbrxdCw8dUAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T05:20:30.531344Z","bundle_sha256":"989ad37fc583d791bd62ee9d44da60a3b4aa4d2db5ac8fb73350cb9c10df2cd4"}}